Description
In the Linux kernel, the following vulnerability has been resolved:
vsock: Keep the binding until socket destruction
Preserve sockets bindings; this includes both resulting from an explicit
bind() and those implicitly bound through autobind during connect().
Prevents socket unbinding during a transport reassignment, which fixes a
use-after-free:
1. vsock_create() (refcnt=1) calls vsock_insert_unbound() (refcnt=2)
2. transport->release() calls vsock_remove_bound() without checking if
sk was bound and moved to bound list (refcnt=1)
3. vsock_bind() assumes sk is in unbound list and before
__vsock_insert_bound(vsock_bound_sockets()) calls
__vsock_remove_bound() which does:
list_del_init(&vsk->bound_table); // nop
sock_put(&vsk->sk); // refcnt=0
BUG: KASAN: slab-use-after-free in __vsock_bind+0x62e/0x730
Read of size 4 at addr ffff88816b46a74c by task a.out/2057
dump_stack_lvl+0x68/0x90
print_report+0x174/0x4f6
kasan_report+0xb9/0x190
__vsock_bind+0x62e/0x730
vsock_bind+0x97/0xe0
__sys_bind+0x154/0x1f0
__x64_sys_bind+0x6e/0xb0
do_syscall_64+0x93/0x1b0
entry_SYSCALL_64_after_hwframe+0x76/0x7e
Allocated by task 2057:
kasan_save_stack+0x1e/0x40
kasan_save_track+0x10/0x30
__kasan_slab_alloc+0x85/0x90
kmem_cache_alloc_noprof+0x131/0x450
sk_prot_alloc+0x5b/0x220
sk_alloc+0x2c/0x870
__vsock_create.constprop.0+0x2e/0xb60
vsock_create+0xe4/0x420
__sock_create+0x241/0x650
__sys_socket+0xf2/0x1a0
__x64_sys_socket+0x6e/0xb0
do_syscall_64+0x93/0x1b0
entry_SYSCALL_64_after_hwframe+0x76/0x7e
Freed by task 2057:
kasan_save_stack+0x1e/0x40
kasan_save_track+0x10/0x30
kasan_save_free_info+0x37/0x60
__kasan_slab_free+0x4b/0x70
kmem_cache_free+0x1a1/0x590
__sk_destruct+0x388/0x5a0
__vsock_bind+0x5e1/0x730
vsock_bind+0x97/0xe0
__sys_bind+0x154/0x1f0
__x64_sys_bind+0x6e/0xb0
do_syscall_64+0x93/0x1b0
entry_SYSCALL_64_after_hwframe+0x76/0x7e
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 7 PID: 2057 at lib/refcount.c:25 refcount_warn_saturate+0xce/0x150
RIP: 0010:refcount_warn_saturate+0xce/0x150
__vsock_bind+0x66d/0x730
vsock_bind+0x97/0xe0
__sys_bind+0x154/0x1f0
__x64_sys_bind+0x6e/0xb0
do_syscall_64+0x93/0x1b0
entry_SYSCALL_64_after_hwframe+0x76/0x7e
refcount_t: underflow; use-after-free.
WARNING: CPU: 7 PID: 2057 at lib/refcount.c:28 refcount_warn_saturate+0xee/0x150
RIP: 0010:refcount_warn_saturate+0xee/0x150
vsock_remove_bound+0x187/0x1e0
__vsock_release+0x383/0x4a0
vsock_release+0x90/0x120
__sock_release+0xa3/0x250
sock_close+0x14/0x20
__fput+0x359/0xa80
task_work_run+0x107/0x1d0
do_exit+0x847/0x2560
do_group_exit+0xb8/0x250
__x64_sys_exit_group+0x3a/0x50
x64_sys_call+0xfec/0x14f0
do_syscall_64+0x93/0x1b0
entry_SYSCALL_64_after_hwframe+0x76/0x7e
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 5.5 | 5.10.235 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 6.12.16-1 | — |
| Debian 13 | linux | 6.12.16-1 | — |
| Debian 12 | linux | 6.1.133-1 | DSA-5900-1 |
| Debian 11 | linux | 5.10.237-1 | DLA-4178-1 |
| Debian 11 | linux-6.1 | 6.1.137-1~deb11u1 | DLA-4193-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1064.66 | — |
| Ubuntu 24.04 LTS | linux | 6.8.0-58.60 | USN-7449-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1027.29 | USN-7449-1 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1027.32 | USN-7449-1 |
| Ubuntu 24.04 LTS | linux-azure-nvidia | 6.8.0-1014.15 | USN-7468-1 |
| Ubuntu 24.04 LTS | linux-gcp | 6.8.0-1028.30 | USN-7450-1 |
| Ubuntu 24.04 LTS | linux-gcp-6.11 +1 | 6.11.0-1013.13~24.04.1 | USN-7448-1 |
| Ubuntu 24.04 LTS | linux-gke | 6.8.0-1023.27 | USN-7450-1 |
| Ubuntu 24.04 LTS | linux-gkeop | 6.8.0-1010.12 | USN-7450-1 |
| Ubuntu 24.04 LTS | linux-hwe-6.11 | 6.11.0-24.24~24.04.1 | USN-7445-1 |
| Ubuntu 24.04 LTS | linux-ibm | 6.8.0-1024.24 | USN-7449-1 |
| Ubuntu 24.04 LTS | linux-lowlatency-hwe-6.11 | 6.11.0-1012.13~24.04.1 | USN-7445-1 |
| Ubuntu 24.04 LTS | linux-nvidia | 6.8.0-1026.29 | USN-7449-1 |
| Ubuntu 24.04 LTS | linux-nvidia-6.11 | 6.11.0-1007.7 | — |
| Ubuntu 24.04 LTS | linux-nvidia-lowlatency | 6.8.0-1026.29.1 | USN-7449-1 |
| Ubuntu 24.04 LTS | linux-nvidia-tegra | 6.8.0-1008.8 | — |
| Ubuntu 24.04 LTS | linux-oem-6.11 | 6.11.0-1020.20 | USN-7445-1 |
| Ubuntu 24.04 LTS | linux-oem-6.8 | 6.8.0-1026.26 | USN-7449-1 |
| Ubuntu 24.04 LTS | linux-oracle | 6.8.0-1024.25 | USN-7449-1 |
| Ubuntu 24.04 LTS | linux-raspi | 6.8.0-1028.32 | USN-7524-1 |
| Ubuntu 24.04 LTS | linux-realtime +1 | No fix yet | — |
| Ubuntu 24.04 LTS | linux-riscv +1 | 6.8.0-58.60.1 | USN-7449-1 |
| Ubuntu 24.04 LTS | linux-xilinx | 6.8.0-1017.18 | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-138.148 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1082.89 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1027.29~22.04.1 | USN-7451-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1087.96 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1027.32~22.04.1 | USN-7449-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1087.96.1 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1081.90 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.8 | 6.8.0-1028.30~22.04.1 | USN-7452-1 |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1079.85 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1064.72 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 | 6.8.0-58.60~22.04.1 | USN-7449-2 |
| Ubuntu 22.04 LTS | linux-ibm | 5.15.0-1074.77 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 | 6.8.0-1024.24~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1077.83 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1078.83 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1076.77 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.8 | 6.8.0-1026.29~22.04.1 | USN-7449-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1035.35 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1023.23 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-oracle-6.8 | 6.8.0-1024.25~22.04.1 | USN-7449-1 |
| Ubuntu 22.04 LTS | linux-raspi | 5.15.0-1076.79 | USN-7455-1 |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv-6.8 +1 | 6.8.0-58.60.1~22.04.1 | USN-7449-1 |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1046.50 | USN-7475-1 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1082.89~20.04.1 | USN-7455-5 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1087.96~20.04.1 | USN-7455-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1087.96~20.04.1.1 | USN-7455-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1081.90~20.04.1 | USN-7459-2 |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-138.148~20.04.1 | USN-7455-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1074.77~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1077.83~20.04.1 | USN-7459-1 |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1079.85~20.04.1 | USN-7455-4 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1077.81~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-raspi-realtime | 6.8.0-2023.24 | USN-7523-1 |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1020.21 | USN-7453-1 |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1075.77 | USN-7455-3 |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1082.91 | USN-7455-3 |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1020.21~22.04.1 | — |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-fips | 6.8.0-78.78+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-aws-fips | 5.15.0-1082.89+fips1 | USN-7455-2 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1087.96+fips1 | USN-7460-1 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-138.148+fips1 | USN-7455-2 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1081.90+fips1 | USN-7455-2 |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1039.39~20.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | rv +77 | 6.12.0-55.13.1.el10_0 | RHSA-2025:8137 |
| RHEL 9 | rv +77 | 5.14.0-570.17.1.el9_6 | RHSA-2025:7903 |
| RHEL 8 | kernel-rt +12 | 4.18.0-553.53.1.rt7.394.el8_10 | RHSA-2025:8057 |
| RHEL 8 | kpatch-patch-4_18_0-553 | 1-6.el8_10 | RHSA-2025:8345 |
| RHEL 8 | kpatch-patch-4_18_0-553_16_1 | 1-5.el8_10 | RHSA-2025:8345 |
| RHEL 8 | kpatch-patch-4_18_0-553_30_1 | 1-4.el8_10 | RHSA-2025:8345 |
| RHEL 8 | kpatch-patch-4_18_0-553_40_1 | 1-2.el8_10 | RHSA-2025:8345 |
| RHEL 8 | perf +26 | 4.18.0-553.53.1.el8_10 | RHSA-2025:8056 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.4 EUS | bpftool | 7.3.0-427.68.2.el9_4 | RHSA-2025:8248, RHSA-2025:8058 |
| RHEL 9.4 EUS | kpatch-patch-5_14_0-427_13_1 | 1-9.el9_4 | RHSA-2025:8342 |
| RHEL 9.4 EUS | kpatch-patch-5_14_0-427_31_1 | 1-7.el9_4 | RHSA-2025:8342 |
| RHEL 9.4 EUS | kpatch-patch-5_14_0-427_44_1 | 1-5.el9_4 | RHSA-2025:8342 |
| RHEL 9.4 EUS | kpatch-patch-5_14_0-427_55_1 | 1-3.el9_4 | RHSA-2025:8342 |
| RHEL 9.4 EUS | rv +64 | 5.14.0-427.68.2.el9_4 | RHSA-2025:8248, RHSA-2025:8058 |
| RHEL 9.2 EUS | bpftool | 7.0.0-284.117.1.el9_2 | RHSA-2025:7683 |
| RHEL 9.2 EUS | kernel-rt +14 | 5.14.0-284.117.1.rt14.402.el9_2 | RHSA-2025:7676 |
| RHEL 9.2 EUS | kpatch-patch-5_14_0-284_104_1 | 1-3.el9_2 | RHSA-2025:8343 |
| RHEL 9.2 EUS | kpatch-patch-5_14_0-284_52_1 | 1-11.el9_2 | RHSA-2025:8343 |
| RHEL 9.2 EUS | kpatch-patch-5_14_0-284_79_1 | 1-7.el9_2 | RHSA-2025:8343 |
| RHEL 9.2 EUS | kpatch-patch-5_14_0-284_92_1 | 1-5.el9_2 | RHSA-2025:8343 |
| RHEL 9.2 EUS | perf +48 | 5.14.0-284.117.1.el9_2 | RHSA-2025:7683 |
| RHEL 9.0 E4S | kernel-rt +12 | 5.14.0-70.132.1.rt21.204.el9_0 | RHSA-2025:7896 |
| RHEL 9.0 E4S | kpatch-patch-5_14_0-70_112_1 | 1-7.el9_0 | RHSA-2025:8344 |
| RHEL 9.0 E4S | kpatch-patch-5_14_0-70_121_1 | 1-6.el9_0 | RHSA-2025:8344 |
| RHEL 9.0 E4S | kpatch-patch-5_14_0-70_124_1 | 1-4.el9_0 | RHSA-2025:8344 |
| RHEL 9.0 E4S | kpatch-patch-5_14_0-70_85_1 | 1-11.el9_0 | RHSA-2025:8344 |
| RHEL 9.0 E4S | perf +28 | 5.14.0-70.132.1.el9_0 | RHSA-2025:7897 |
| RHEL 8.8 EUS | kpatch-patch-4_18_0-477_43_1 | 1-9.el8_8 | RHSA-2025:8346 |
| RHEL 8.8 EUS | kpatch-patch-4_18_0-477_67_1 | 1-6.el8_8 | RHSA-2025:8346 |
| RHEL 8.8 EUS | kpatch-patch-4_18_0-477_81_1 | 1-4.el8_8 | RHSA-2025:8346 |
| RHEL 8.8 EUS | kpatch-patch-4_18_0-477_89_1 | 1-2.el8_8 | RHSA-2025:8346 |
| RHEL 8.8 EUS | perf +26 | 4.18.0-477.97.1.el8_8 | RHSA-2025:7682 |
| RHEL 8.6 TUS | perf +17 | 4.18.0-372.145.1.el8_6 | RHSA-2025:7652 |
| RHEL 8.6 E4S | kpatch-patch-4_18_0-372_118_1 | 1-6.el8_6 | RHSA-2025:8347 |
| RHEL 8.6 E4S | kpatch-patch-4_18_0-372_131_1 | 1-5.el8_6 | RHSA-2025:8347 |
| RHEL 8.6 E4S | kpatch-patch-4_18_0-372_137_1 | 1-2.el8_6 | RHSA-2025:8347 |
| RHEL 8.6 E4S | kpatch-patch-4_18_0-372_91_1 | 1-10.el8_6 | RHSA-2025:8347 |
| RHEL 8.6 E4S | perf +25 | 4.18.0-372.145.1.el8_6 | RHSA-2025:7652 |
| RHEL 8.6 AUS | perf +17 | 4.18.0-372.145.1.el8_6 | RHSA-2025:7652 |
| RHEL 8.4 TUS | kernel-rt +12 | 4.18.0-305.157.1.rt7.234.el8_4 | RHSA-2025:7902 |
| RHEL 8.4 TUS | perf +17 | 4.18.0-305.157.1.el8_4 | RHSA-2025:7901 |
| RHEL 8.4 E4S | kpatch-patch-4_18_0-305_120_1 | 1-10.el8_4 | RHSA-2025:8348 |
| RHEL 8.4 E4S | kpatch-patch-4_18_0-305_138_1 | 1-6.el8_4 | RHSA-2025:8348 |
| RHEL 8.4 E4S | kpatch-patch-4_18_0-305_145_1 | 1-4.el8_4 | RHSA-2025:8348 |
| RHEL 8.4 E4S | kpatch-patch-4_18_0-305_150_1 | 1-2.el8_4 | RHSA-2025:8348 |
| RHEL 8.4 E4S | perf +18 | 4.18.0-305.157.1.el8_4 | RHSA-2025:7901 |
| RHEL 8.4 AUS | perf +17 | 4.18.0-305.157.1.el8_4 | RHSA-2025:7901 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | rv +75 | 5.14.0-570.17.1.el9_6 | ALSA-2025:7903 |
| AlmaLinux 8 | kernel-rt +9 | 4.18.0-553.53.1.rt7.394.el8_10 | ALSA-2025:8057 |
| AlmaLinux 8 | perf +24 | 4.18.0-553.53.1.el8_10 | ALSA-2025:8056 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | kernel | 6.12.0-55.13.1.el10_0 | RLSA-2025:8137 |
| Rocky Linux 8 | kernel | 4.18.0-553.53.1.el8_10 | RLSA-2025:8056 |
| Rocky Linux 8 | kernel-rt | 4.18.0-553.53.1.rt7.394.el8_10 | RLSA-2025:8057 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | kernel-64kb +3 | 6.4.0-150600.23.47.2 | SUSE-SU-2025:1180-1 |
| SLES 15 SP6 | kernel-azure +1 | 6.4.0-150600.8.34.2 | SUSE-SU-2025:1177-1 |
| SLES 15 SP6 | kernel-coco +3 | 6.4.0-15061.21.coco15sp6.1 | SUSE-SU-2025:01919-1 |
| SLES 15 SP6 | kernel-default-base | 6.4.0-150600.23.47.2.150600.12.20.2 | SUSE-SU-2025:1180-1 |
| SLES 15 SP6 | kernel-docs +2 | 6.4.0-150600.23.47.1 | SUSE-SU-2025:1180-1 |
| SLES 15 SP6 | kernel-syms-azure | 6.4.0-150600.8.34.1 | SUSE-SU-2025:1177-1 |
| SLES 15 SP5 | kernel-64kb +6 | 5.14.21-150500.55.113.1 | SUSE-SU-2025:02264-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.113.1.150500.6.53.1 | SUSE-SU-2025:02264-1 |
| SLES 15 SP4 | kernel-64kb +3 | 5.14.21-150400.24.170.2 | SUSE-SU-2025:02537-1 |
| SLES 15 SP4 | kernel-default-base | 5.14.21-150400.24.170.2.150400.24.86.2 | SUSE-SU-2025:02537-1 |
| SLES 15 SP4 | kernel-docs +2 | 5.14.21-150400.24.170.1 | SUSE-SU-2025:02537-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | kernel-default-base | 5.14.21-150500.55.113.1.150500.6.53.1 | SUSE-SU-2025:02264-1 |
| SLES for SAP 15 SP5 | kernel-docs +4 | 5.14.21-150500.55.113.1 | SUSE-SU-2025:02264-1 |
| SLES for SAP 15 SP4 | kernel-default +1 | 5.14.21-150400.24.170.2 | SUSE-SU-2025:02537-1 |
| SLES for SAP 15 SP4 | kernel-default-base | 5.14.21-150400.24.170.2.150400.24.86.2 | SUSE-SU-2025:02537-1 |
| SLES for SAP 15 SP4 | kernel-docs +2 | 5.14.21-150400.24.170.1 | SUSE-SU-2025:02537-1 |
| SLE Micro 6.1 | kernel-default-base | 6.4.0-28.1.21.6 | SUSE-SU-2025:20270-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0-RT_Update_4 | 9-1.1 | SUSE-SU-2025:20785-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0-RT_Update_5 | 8-1.1 | SUSE-SU-2025:20786-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0_Update_2 +1 | 12-1.1 | SUSE-SU-2025:20784-1, SUSE-SU-2025:20768-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0_Update_4 | 10-1.2 | SUSE-SU-2025:20769-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0_Update_5 | 8-1.2 | SUSE-SU-2025:20770-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0_Update_6 +1 | 1-3.1 | SUSE-SU-2025:20270-1, SUSE-SU-2025:20260-1 |
| SLE Micro 6.1 | kernel-rt +4 | 6.4.0-28.1 | SUSE-SU-2025:20270-1, SUSE-SU-2025:20260-1 |
| SLE Micro 6.0 | kernel-default-base | 6.4.0-28.1.21.6 | SUSE-SU-2025:20192-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0-RT_Update_4 | 9-1.1 | SUSE-SU-2025:20726-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0-RT_Update_5 | 8-1.1 | SUSE-SU-2025:20727-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_2 +1 | 12-1.1 | SUSE-SU-2025:20723-1, SUSE-SU-2025:20722-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_3 +1 | 12-1.2 | SUSE-SU-2025:20738-1, SUSE-SU-2025:20737-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_4 | 10-1.2 | SUSE-SU-2025:20724-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_5 | 8-1.2 | SUSE-SU-2025:20725-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_6 +1 | 1-3.1 | SUSE-SU-2025:20192-1, SUSE-SU-2025:20190-1 |
| SLE Micro 6.0 | kernel-rt +4 | 6.4.0-28.1 | SUSE-SU-2025:20192-1, SUSE-SU-2025:20190-1 |
| SLE Micro 5.5 | kernel-default-base | 5.14.21-150500.55.113.1.150500.6.53.1 | SUSE-SU-2025:02264-1 |
| SLE Micro 5.5 | kernel-rt | 5.14.21-150500.13.100.2 | SUSE-SU-2025:02321-1 |
| SLE Micro 5.5 | kernel-source +1 | 5.14.21-150500.55.113.1 | SUSE-SU-2025:02264-1 |
| SLE Micro 5.5 | kernel-source-rt | 5.14.21-150500.13.100.1 | SUSE-SU-2025:02321-1 |
| SLE Micro 5.4 | kernel-default | 5.14.21-150400.24.170.2 | SUSE-SU-2025:02537-1 |
| SLE Micro 5.4 | kernel-default-base | 5.14.21-150400.24.170.2.150400.24.86.2 | SUSE-SU-2025:02537-1 |
| SLE Micro 5.4 | kernel-rt +1 | 5.14.21-150400.15.124.1 | SUSE-SU-2025:02322-1 |
| SLE Micro 5.3 | kernel-default | 5.14.21-150400.24.170.2 | SUSE-SU-2025:02537-1 |
| SLE Micro 5.3 | kernel-default-base | 5.14.21-150400.24.170.2.150400.24.86.2 | SUSE-SU-2025:02537-1 |
| SLE Micro 5.3 | kernel-rt +1 | 5.14.21-150400.15.124.1 | SUSE-SU-2025:02322-1 |
| SLE Live Patching 15 SP6 | kernel-default | 6.4.0-150600.23.47.2 | SUSE-SU-2025:1180-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_1 | 21-150600.2.2 | SUSE-SU-2025:03341-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_10 | 1-150600.1.5.1 | SUSE-SU-2025:1178-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_2 | 17-150600.2.2 | SUSE-SU-2025:03315-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_4 | 16-150600.2.2 | SUSE-SU-2025:03317-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_5 | 15-150600.2.2 | SUSE-SU-2025:03343-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_10 | 1-150600.13.5.1 | SUSE-SU-2025:1180-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_4 | 17-150600.2.1 | SUSE-SU-2025:03406-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_5 | 16-150600.2.1 | SUSE-SU-2025:03408-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.113.1 | SUSE-SU-2025:02264-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_19 | 15-150500.2.1 | SUSE-SU-2025:03393-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_23 +1 | 7-150500.2.1 | SUSE-SU-2025:03400-1, SUSE-SU-2025:03395-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_26 | 6-150500.2.1 | SUSE-SU-2025:03397-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_28 | 1-150500.11.3.1 | SUSE-SU-2025:02264-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_31 +1 | 15-150400.2.1 | SUSE-SU-2025:03374-1, SUSE-SU-2025:03370-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_33 | 14-150400.2.1 | SUSE-SU-2025:03387-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_34 | 13-150400.2.1 | SUSE-SU-2025:03381-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_36 | 7-150400.2.1 | SUSE-SU-2025:03375-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_40 | 6-150400.2.1 | SUSE-SU-2025:03391-1 |
| SLE HPC 15 SP5 | kernel-64kb +5 | 5.14.21-150500.55.113.1 | SUSE-SU-2025:02264-1 |
| SLE HPC 15 SP5 | kernel-default-base | 5.14.21-150500.55.113.1.150500.6.53.1 | SUSE-SU-2025:02264-1 |
| SLE HPC 15 SP4 | kernel-64kb +2 | 5.14.21-150400.24.170.2 | SUSE-SU-2025:02537-1 |
| SLE HPC 15 SP4 | kernel-default-base | 5.14.21-150400.24.170.2.150400.24.86.2 | SUSE-SU-2025:02537-1 |
| SLE HPC 15 SP4 | kernel-docs +2 | 5.14.21-150400.24.170.1 | SUSE-SU-2025:02537-1 |
| SUSE Real Time Module 15 SP6 | kernel-rt +3 | 6.4.0-150600.10.34.1 | SUSE-SU-2025:1178-1 |
| SUSE Manager Server 4.3 | kernel-default +1 | 5.14.21-150400.24.170.2 | SUSE-SU-2025:02537-1 |
| SUSE Manager Server 4.3 | kernel-default-base | 5.14.21-150400.24.170.2.150400.24.86.2 | SUSE-SU-2025:02537-1 |
| SUSE Manager Server 4.3 | kernel-syms +1 | 5.14.21-150400.24.170.1 | SUSE-SU-2025:02537-1 |
| SUSE Manager Proxy 4.3 | kernel-default | 5.14.21-150400.24.170.2 | SUSE-SU-2025:02537-1 |
| SUSE Manager Proxy 4.3 | kernel-default-base | 5.14.21-150400.24.170.2.150400.24.86.2 | SUSE-SU-2025:02537-1 |
| SUSE Manager Proxy 4.3 | kernel-syms +1 | 5.14.21-150400.24.170.1 | SUSE-SU-2025:02537-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | dtb-aarch64 +4 | 6.4.0-150600.23.47.1 | SUSE-SU-2025:1180-1 |
| openSUSE Leap 15.6 | kernel-64kb +5 | 6.4.0-150600.23.47.2 | SUSE-SU-2025:1180-1 |
| openSUSE Leap 15.6 | kernel-azure +1 | 6.4.0-150600.8.34.2 | SUSE-SU-2025:1177-1 |
| openSUSE Leap 15.6 | kernel-default-base | 6.4.0-150600.23.47.2.150600.12.20.2 | SUSE-SU-2025:1180-1 |
| openSUSE Leap 15.6 | kernel-rt +3 | 6.4.0-150600.10.34.1 | SUSE-SU-2025:1178-1 |
| openSUSE Leap 15.6 | kernel-syms-azure | 6.4.0-150600.8.34.1 | SUSE-SU-2025:1177-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.131-143.221 | 1.0-0.amzn2023 | ALAS2023-2025-915 |
| Amazon Linux 2023 | perf +14 | 6.1.131-143.221.amzn2023 | ALAS2023-2025-915 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | kernel | 6.6.82.1-1 | — |
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.180.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | rv +28 | 6.12.0-55.19.1.0.1.el10_0 | ELSA-2025-8137 |
| Oracle Linux 9 | kernel-uek +34 | 6.12.0-101.33.4.3.el10uek | ELSA-2025-20530, ELSA-2025-20480 |
| Oracle Linux 9 | rv +28 | 5.14.0-570.17.1.0.1.el9_6 | ELSA-2025-7903 |
| Oracle Linux 8 | perf +19 | 4.18.0-553.53.1.el8_10 | ELSA-2025-8056 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 4 repositories
-
hoefler02/CVE-2025-21756 ★ 158 · Apr 18, 2025
Exploit for CVE-2025-21756 for Linux kernel 6.6.75. My first linux kernel exploit!
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khoatran107/cve-2025-21756 ★ 9 · Jun 26, 2025
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h3raklez/CVE-2025-21756 ★ 1 · Mar 22, 2026
CVE-2025-21756: Attack of the Vsock
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KuanKuanQAQ/cve-testing ★ 0 · Jun 19, 2025
Reproduce CVE-2022-32250 and CVE-2025-21756 by tampering with modprobe_path and hijacking control flow, respectively.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 50
- WID-SEC-2025-0453 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- USN-7449-1 linux, linux-aws, linux-azure, linux-azure-6.8, linux-ibm, linux-lowlatency, linux-lowlatency-hwe-6.8, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency, linux-oem-6.8, linux-oracle, linux-oracle-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7450-1 linux-gcp, linux-gke, linux-gkeop vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7468-1 linux-azure-nvidia vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7453-1 linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7451-1 linux-aws-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7524-1 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7523-1 linux-raspi-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7452-1 linux-gcp-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7449-2 linux-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7455-1 linux, linux-aws, linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15, linux-gcp, linux-gke, linux-gkeop, linux-hwe-5.15, linux-ibm, linux-intel-iotg, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-nvidia-tegra, linux-nvidia-tegra-igx, linux-oracle, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7459-1 linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7445-1 linux, linux-aws, linux-gcp, linux-hwe-6.11, linux-lowlatency, linux-lowlatency-hwe-6.11, linux-oem-6.11, linux-oracle, linux-raspi, linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7459-2 linux-gcp-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7455-2 linux-aws-fips, linux-fips, linux-gcp-fips vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7460-1 linux-azure-fips vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7475-1 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7455-5 linux-aws-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7455-4 linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7455-3 linux-intel-iot-realtime, linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7448-1 linux-azure, linux-azure-6.11 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- ALSA-2025:7903 Important: kernel security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:8056 Important: kernel security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:8057 Important: kernel-rt security update AlmaLinux Security Advisories · Oct 29, 2026
- ICSA-26-295-16 Siemens SIMATIC S7-1500 TM MFP CISA ICS & IT advisories · Oct 22, 2026
- WID-SEC-2026-3891 Siemens SIMATIC S7: Mehrere Schwachstelle BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2025:8248 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2025:8137 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- SSA-082556 SSA-082556: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.5 Siemens ProductCERT · Oct 13, 2026
- SSA-265688 SSA-265688: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 TM MFP V1.1 Siemens ProductCERT · Oct 13, 2026
- SSA-784472 SSA-784472: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 TM MFP V1.1.1 Siemens ProductCERT · Oct 13, 2026
- WID-SEC-2025-1439 Dell Secure Connect Gateway: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Oct 11, 2026
- RHSA-2025:8348 Red Hat Security Advisory: kpatch-patch-4_18_0-305_120_1, kpatch-patch-4_18_0-305_138_1, kpatch-patch-4_18_0-305_145_1, and kpatch-patch-4_18_0-305_150_1 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:8347 Red Hat Security Advisory: kpatch-patch-4_18_0-372_118_1, kpatch-patch-4_18_0-372_131_1, kpatch-patch-4_18_0-372_137_1, and kpatch-patch-4_18_0-372_91_1 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:8346 Red Hat Security Advisory: kpatch-patch-4_18_0-477_43_1, kpatch-patch-4_18_0-477_67_1, kpatch-patch-4_18_0-477_81_1, and kpatch-patch-4_18_0-477_89_1 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:8345 Red Hat Security Advisory: kpatch-patch-4_18_0-553, kpatch-patch-4_18_0-553_16_1, kpatch-patch-4_18_0-553_30_1, and kpatch-patch-4_18_0-553_40_1 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:8343 Red Hat Security Advisory: kpatch-patch-5_14_0-284_104_1, kpatch-patch-5_14_0-284_52_1, kpatch-patch-5_14_0-284_79_1, and kpatch-patch-5_14_0-284_92_1 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:8344 Red Hat Security Advisory: kpatch-patch-5_14_0-70_112_1, kpatch-patch-5_14_0-70_121_1, kpatch-patch-5_14_0-70_124_1, and kpatch-patch-5_14_0-70_85_1 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:8342 Red Hat Security Advisory: kpatch-patch-5_14_0-427_13_1, kpatch-patch-5_14_0-427_31_1, kpatch-patch-5_14_0-427_44_1, and kpatch-patch-5_14_0-427_55_1 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:8057 Red Hat Security Advisory: kernel-rt security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:8056 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:7902 Red Hat Security Advisory: kernel-rt security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:7901 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:7896 Red Hat Security Advisory: kernel-rt security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:7897 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:7683 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:7682 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:7676 Red Hat Security Advisory: kernel-rt security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:7652 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2025:7903 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jul 30, 2026
References
- https://git.kernel.org/stable/c/e7754d564579a5db9c5c9f74228df5d6dd6f1173
- https://git.kernel.org/stable/c/e48fcb403c2d0e574c19683f09399ab4cf67809c
- https://git.kernel.org/stable/c/42b33381e5e1f2b967dc4fb4221ddb9aaf10d197
- https://git.kernel.org/stable/c/3f43540166128951cc1be7ab1ce6b7f05c670d8b
- https://git.kernel.org/stable/c/645ce25aa0e67895b11d89f27bb86c9d444c40f8
- https://git.kernel.org/stable/c/b1afd40321f1c243cffbcf40ea7ca41aca87fa5e
- https://git.kernel.org/stable/c/fcdd2242c0231032fc84e1404315c245ae56322a