Description
In the Linux kernel, the following vulnerability has been resolved:
vsock/bpf: return early if transport is not assigned
Some of the core functions can only be called if the transport
has been assigned.
As Michal reported, a socket might have the transport at NULL,
for example after a failed connect(), causing the following trace:
BUG: kernel NULL pointer dereference, address: 00000000000000a0
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 12faf8067 P4D 12faf8067 PUD 113670067 PMD 0
Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
CPU: 15 UID: 0 PID: 1198 Comm: a.out Not tainted 6.13.0-rc2+
RIP: 0010:vsock_connectible_has_data+0x1f/0x40
Call Trace:
vsock_bpf_recvmsg+0xca/0x5e0
sock_recvmsg+0xb9/0xc0
__sys_recvfrom+0xb3/0x130
__x64_sys_recvfrom+0x20/0x30
do_syscall_64+0x93/0x180
entry_SYSCALL_64_after_hwframe+0x76/0x7e
So we need to check the `vsk->transport` in vsock_bpf_recvmsg(),
especially for connected sockets (stream/seqpacket) as we already
do in __vsock_connectible_recvmsg().
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 6.4 | 6.6.74 |
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 | 6.12.11-1 | — |
| Debian 13 | linux | 6.12.11-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux | 6.8.0-62.65 | USN-7595-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1030.32 | USN-7595-1 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1030.35 | USN-7596-1 |
| Ubuntu 24.04 LTS | linux-azure-nvidia | 6.8.0-1018.19 | USN-7596-2 |
| Ubuntu 24.04 LTS | linux-gcp | 6.8.0-1031.33 | USN-7595-5 |
| 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 | 6.8.0-1026.30 | USN-7595-1 |
| Ubuntu 24.04 LTS | linux-gkeop | 6.8.0-1013.15 | USN-7595-1 |
| 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 | 6.8.0-1027.27 | USN-7595-1 |
| Ubuntu 24.04 LTS | linux-lowlatency | 6.8.0-62.65.1 | USN-7595-1 |
| 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 | 6.8.0-1029.32 | USN-7595-1 |
| Ubuntu 24.04 LTS | linux-nvidia-6.11 | 6.11.0-1007.7 | — |
| Ubuntu 24.04 LTS | linux-nvidia-lowlatency | 6.8.0-1029.32.1 | USN-7595-1 |
| 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 | 6.8.0-1029.29 | USN-7595-1 |
| Ubuntu 24.04 LTS | linux-oracle | 6.8.0-1027.28 | USN-7595-4 |
| Ubuntu 24.04 LTS | linux-raspi | 6.8.0-1029.33 | USN-7595-4 |
| Ubuntu 24.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 24.04 LTS | linux-xilinx | 6.8.0-1017.18 | — |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1030.32~22.04.1 | USN-7595-1 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1030.35~22.04.1 | USN-7596-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.8 | 6.8.0-1031.33~22.04.1 | USN-7595-5 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 | 6.8.0-64.67~22.04.1 | USN-7653-1 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 | 6.8.0-1027.27~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-lowlatency-hwe-6.8 | 6.8.0-62.65.1~22.04.1 | USN-7595-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.8 | 6.8.0-1029.32~22.04.1 | USN-7595-1 |
| Ubuntu 22.04 LTS | linux-oracle-6.8 | 6.8.0-1027.28~22.04.1 | USN-7595-4 |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv-6.8 | 6.8.0-62.65~22.04.1 | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro Realtime 24.04 LTS | linux-raspi-realtime | 6.8.0-2024.25 | USN-7595-3 |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1023.24 | USN-7595-2 |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1023.24~22.04.1 | — |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-fips | 6.8.0-78.78+fips1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | kernel-64kb +6 | 6.4.0-150600.23.38.1 | SUSE-SU-2025:0499-1 |
| SLES 15 SP6 | kernel-azure +2 | 6.4.0-150600.8.31.1 | SUSE-SU-2025:0847-1 |
| SLES 15 SP6 | kernel-coco +3 | 6.4.0-15061.15.coco15sp6.1 | SUSE-SU-2025:0564-1 |
| SLES 15 SP6 | kernel-default-base | 6.4.0-150600.23.38.1.150600.12.16.2 | SUSE-SU-2025:0499-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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_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_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 Live Patching 15 SP6 | kernel-default | 6.4.0-150600.23.38.1 | SUSE-SU-2025:0499-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_8 | 1-150600.1.3.1 | SUSE-SU-2025:0557-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_8 | 1-150600.13.3.2 | SUSE-SU-2025:0499-1 |
| SUSE Real Time Module 15 SP6 | kernel-rt +3 | 6.4.0-150600.10.26.1 | SUSE-SU-2025:0557-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | dtb-aarch64 +10 | 6.4.0-150600.23.38.1 | SUSE-SU-2025:0499-1 |
| openSUSE Leap 15.6 | kernel-azure +2 | 6.4.0-150600.8.31.1 | SUSE-SU-2025:0847-1 |
| openSUSE Leap 15.6 | kernel-default-base | 6.4.0-150600.23.38.1.150600.12.16.2 | SUSE-SU-2025:0499-1 |
| openSUSE Leap 15.6 | kernel-rt +3 | 6.4.0-150600.10.26.1 | SUSE-SU-2025:0557-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | kernel | 6.6.76.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | kernel-uek +34 | 6.12.0-101.33.4.3.el10uek | ELSA-2025-20530, ELSA-2025-20480 |
Advisories 21
- USN-7653-1 linux-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7595-1 linux, linux-aws, linux-aws-6.8, linux-gke, linux-gkeop, linux-ibm, linux-lowlatency, linux-lowlatency-hwe-6.8, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency, linux-oem-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7595-4 linux-oracle, linux-oracle-6.8, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7595-3 linux-raspi-realtime 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-7448-1 linux-azure, linux-azure-6.11 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7595-5 linux-gcp, linux-gcp-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7595-2 linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7596-2 linux-azure-nvidia vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7596-1 linux-azure, linux-azure-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- WID-SEC-2025-0232 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Sep 3, 2026
- SUSE-SU-2025:20270-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20192-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20260-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20190-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:0564-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0557-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0499-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0847-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2025-20530 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 18, 2025
- ELSA-2025-20480 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 17, 2025