Description
The Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to attacks in some cases even after enabling the spectre-BTI mitigation with prctl. The same behavior can be observed on a bare-metal machine when forcing the mitigation to IBRS on boot command line.
This happened because when plain IBRS was enabled (not enhanced IBRS), the kernel had some logic that determined that STIBP was not needed. The IBRS bit implicitly protects against cross-thread branch target injection. However, with legacy IBRS, the IBRS bit was cleared on returning to userspace, due to performance reasons, which disabled the implicit STIBP and left userspace threads vulnerable to cross-thread branch target injection against which STIBP protects.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux Kernel | < 6.3 | 6.3 |
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 | 6.1.20-1 | — |
| Debian 13 | linux | 6.1.20-1 | — |
| Debian 12 | linux | 6.1.20-1 | — |
| Debian 10 | linux | 4.19.282-1 | DLA-3403-1 |
| Debian 10 | linux-5.10 | 5.10.178-3~deb10u1 | DLA-3404-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1019.21 | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-75.82 | USN-6172-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1038.43 | USN-6172-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1040.47 | USN-6172-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1041.48.1 | USN-6223-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1036.44 | USN-6172-1 |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1036.41 | USN-6172-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1022.27 | USN-6172-1 |
| Ubuntu 22.04 LTS | linux-hwe-5.19 | 5.19.0-45.46~22.04.1 | USN-6171-1 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1032.35 | USN-6172-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1033.38 | USN-6207-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1035.40 | USN-6172-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1027.27 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1015.15 | — |
| Ubuntu 22.04 LTS | linux-oem-6.1 | 6.1.0-1009.9 | USN-6033-1 |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1037.43 | USN-6172-1 |
| Ubuntu 22.04 LTS | linux-riscv +5 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-152.169 | USN-6172-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1104.112 | USN-6185-1 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1038.43~20.04.1 | USN-6172-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1110.116 | USN-6185-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1040.47~20.04.1 | USN-6172-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1040.47~20.04.1.1 | USN-6172-1 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1065.71 | USN-6185-1 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1107.116 | USN-6185-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1036.44~20.04.1 | USN-6172-1 |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1102.109 | USN-6185-1 |
| Ubuntu 20.04 LTS | linux-gke-5.15 | 5.15.0-1036.41~20.04.1 | USN-6172-1 |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1071.75 | USN-6185-1 |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1022.27~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-75.82~20.04.1 | USN-6172-1 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1051.56 | USN-6185-1 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1033.38~20.04.1 | USN-6207-1 |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1017.18 | USN-6256-1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1093.99 | USN-6185-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1015.15~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1103.112 | USN-6185-1 |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1037.43~20.04.1 | USN-6172-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1088.99 | USN-6185-1 |
| Ubuntu 20.04 LTS | linux-riscv +23 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1035.39~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-xilinx-zynqmp | 5.4.0-1024.28 | USN-6222-1 |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
Show 9 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 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1033.35 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1040.45 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1104.112+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1110.116+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1079.88 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1107.116+fips1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2106.112 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2085.91 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1122.133 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2069.74 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1100.107 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux | 4.15.0-224.236 | USN-6740-1 |
| Ubuntu Pro 18.04 LTS | linux-aws | 4.15.0-1167.180 | USN-6740-1 |
| Ubuntu Pro 18.04 LTS | linux-aws-5.4 | 5.4.0-1104.112~18.04.1 | — |
| Ubuntu Pro 18.04 LTS | linux-azure-4.15 | 4.15.0-1176.191 | USN-6740-1 |
| Ubuntu Pro 18.04 LTS | linux-azure-5.4 | 5.4.0-1110.116~18.04.1 | — |
| Ubuntu Pro 18.04 LTS | linux-gcp-4.15 | 4.15.0-1161.178 | USN-6740-1 |
| Ubuntu Pro 18.04 LTS | linux-gcp-5.4 | 5.4.0-1107.116~18.04.1 | — |
| Ubuntu Pro 18.04 LTS | linux-hwe-5.4 | 5.4.0-152.169~18.04.1 | — |
| Ubuntu Pro 18.04 LTS | linux-ibm-5.4 | 5.4.0-1051.56~18.04.1 | — |
| Ubuntu Pro 18.04 LTS | linux-kvm | 4.15.0-1151.156 | USN-6740-1 |
| Ubuntu Pro 18.04 LTS | linux-oracle | 4.15.0-1130.141 | USN-6740-1 |
| Ubuntu Pro 18.04 LTS | linux-oracle-5.4 | 5.4.0-1103.112~18.04.1 | — |
| Ubuntu Pro 18.04 LTS | linux-raspi-5.4 | 5.4.0-1088.99~18.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux | 4.4.0-253.287 | USN-6739-1 |
| Ubuntu Pro 16.04 LTS | linux-aws | 4.4.0-1168.183 | USN-6739-1 |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1167.180~16.04.1 | USN-6740-1 |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1176.191~16.04.1 | USN-6740-1 |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1161.178~16.04.1 | USN-6740-1 |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-224.236~16.04.1 | USN-6740-1 |
| Ubuntu Pro 16.04 LTS | linux-kvm | 4.4.0-1131.141 | USN-6739-1 |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1130.141~16.04.1 | USN-6740-1 |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1130.136 | USN-6739-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1176.191~14.04.1 | USN-6740-1 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-253.287~14.04.1 | USN-6739-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | bpftool | 7.0.0-284.25.1.el9_2 | RHSA-2023:4377 |
| RHEL 9 | kernel-rt +14 | 5.14.0-284.25.1.rt14.310.el9_2 | RHSA-2023:4378 |
| RHEL 9 | perf +48 | 5.14.0-284.25.1.el9_2 | RHSA-2023:4377 |
| RHEL 8 | kernel-rt +12 | 4.18.0-513.5.1.rt7.307.el8_9 | RHSA-2023:6901 |
| RHEL 8 | perf +26 | 4.18.0-513.5.1.el8_9 | RHSA-2023:7077 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | perf +2 | 4.18.0-372.87.1.el8_6 | RHSA-2024:0412 |
| RHEL 9.0 EUS | kernel-rt +12 | 5.14.0-70.75.1.rt21.146.el9_0 | RHSA-2023:5603 |
| RHEL 9.0 EUS | perf +29 | 5.14.0-70.75.1.el9_0 | RHSA-2023:5604 |
| RHEL 8.8 EUS | perf +26 | 4.18.0-477.58.1.el8_8 | RHSA-2024:3810 |
| RHEL 8.6 EUS | perf +26 | 4.18.0-372.87.1.el8_6 | RHSA-2024:0412 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | bpftool | 7.0.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux 9 | kernel-rt +13 | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux 9 | perf +45 | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux 8 | perf +24 | 4.18.0-513.5.1.el8_9 | ALSA-2023:7077 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | kernel-rt | 5.14.0-284.25.1.rt14.310.el9_2 | RLSA-2023:4378 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | kernel-64kb +6 | 5.14.21-150500.55.7.1 | SUSE-SU-2023:2871-1 |
| SLES 15 SP5 | kernel-azure +2 | 5.14.21-150500.33.3.1 | SUSE-SU-2023:2646-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.7.1.150500.6.2.5 | SUSE-SU-2023:2871-1 |
| SLES 15 SP4 | kernel-64kb +6 | 5.14.21-150400.24.63.1 | SUSE-SU-2023:2140-1 |
| SLES 15 SP4 | kernel-azure +2 | 5.14.21-150400.14.49.1 | SUSE-SU-2023:2141-1 |
| SLES 15 SP4 | kernel-default-base | 5.14.21-150400.24.63.1.150400.24.27.1 | SUSE-SU-2023:2140-1 |
| SLES 15 SP3 | kernel-64kb +6 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SLES 15 SP3 | kernel-syms | 5.3.18-150300.59.121.1 | SUSE-SU-2023:2148-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-150200.24.151.1.150200.9.73.1 | SUSE-SU-2023:2146-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.151.1 | SUSE-SU-2023:2146-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-150100.197.145.1 | SUSE-SU-2023:2151-1 |
Show 32 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.133.1 | SUSE-SU-2023:2162-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.159.1 | SUSE-SU-2023:2163-1 |
| SLES 12 SP4 | drbd | 9.0.14+git.62f906cf-4.26.2 | SUSE-SU-2023:2232-1 |
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.125.1 | SUSE-SU-2023:2232-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.205.1 | SUSE-SU-2023:2805-1 |
| SLES for SAP 15 SP3 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SLES for SAP 15 SP3 | kernel-docs +4 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLES for SAP 15 SP3 | kernel-syms | 5.3.18-150300.59.121.1 | SUSE-SU-2023:2148-1 |
| SLES for SAP 15 SP2 | kernel-default-base | 5.3.18-150200.24.151.1.150200.9.73.1 | SUSE-SU-2023:2146-1 |
| SLES for SAP 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.151.1 | SUSE-SU-2023:2146-1 |
| SLES for SAP 15 SP1 | kernel-docs +4 | 4.12.14-150100.197.145.1 | SUSE-SU-2023:2151-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.133.1 | SUSE-SU-2023:2162-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.159.1 | SUSE-SU-2023:2163-1 |
| SLE Real Time 15 SP3 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SLE Real Time 15 SP3 | kernel-docs +4 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLE Real Time 15 SP3 | kernel-syms | 5.3.18-150300.59.121.1 | SUSE-SU-2023:2148-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.124.1 | SUSE-SU-2023:2156-1 |
| SLE Micro 5.4 | kernel-default | 5.14.21-150400.24.63.1 | SUSE-SU-2023:2140-1 |
| SLE Micro 5.4 | kernel-default-base | 5.14.21-150400.24.63.1.150400.24.27.1 | SUSE-SU-2023:2140-1 |
| SLE Micro 5.4 | kernel-rt | 5.14.21-150400.15.28.2 | SUSE-SU-2023:2231-1 |
| SLE Micro 5.3 | kernel-default | 5.14.21-150400.24.63.1 | SUSE-SU-2023:2140-1 |
| SLE Micro 5.3 | kernel-default-base | 5.14.21-150400.24.63.1.150400.24.27.1 | SUSE-SU-2023:2140-1 |
| SLE Micro 5.3 | kernel-rt | 5.14.21-150400.15.28.2 | SUSE-SU-2023:2231-1 |
| SLE Micro 5.2 | kernel-default | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLE Micro 5.2 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SLE Micro 5.2 | kernel-rt | 5.3.18-150300.127.1 | SUSE-SU-2023:2147-1 |
| SLE Micro 5.1 | kernel-default | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLE Micro 5.1 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SLE Micro 5.1 | kernel-rt | 5.3.18-150300.127.1 | SUSE-SU-2023:2147-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.7.1 | SUSE-SU-2023:2871-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5-RT_Update_1 | 1-150500.11.5.1 | SUSE-SU-2023:2809-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_1 | 1-150500.11.7.1 | SUSE-SU-2023:2871-1 |
| SLE Live Patching 15 SP4 | kernel-default | 5.14.21-150400.24.63.1 | SUSE-SU-2023:2140-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4-RT_Update_7 | 1-150400.1.5.2 | SUSE-SU-2023:2231-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_12 | 1-150400.9.3.1 | SUSE-SU-2023:2140-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_32 | 1-150300.7.3.2 | SUSE-SU-2023:2148-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-150200.24.151.1 | SUSE-SU-2023:2146-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_36 | 1-150200.5.3.1 | SUSE-SU-2023:2146-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-150100.197.145.1 | SUSE-SU-2023:2151-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_40 | 1-150100.3.3.1 | SUSE-SU-2023:2151-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.159.1 | SUSE-SU-2023:2163-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_43 | 1-8.3.1 | SUSE-SU-2023:2163-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.125.1 | SUSE-SU-2023:2232-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_35 | 1-6.5.1 | SUSE-SU-2023:2232-1 |
| SLE HPC 15 SP3 | kernel-64kb +5 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SLE HPC 15 SP3 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SLE HPC 15 SP3 | kernel-syms | 5.3.18-150300.59.121.1 | SUSE-SU-2023:2148-1 |
| SLE HPC 15 SP2 | kernel-default-base | 5.3.18-150200.24.151.1.150200.9.73.1 | SUSE-SU-2023:2146-1 |
| SLE HPC 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.151.1 | SUSE-SU-2023:2146-1 |
| SLE HPC 15 SP1 | kernel-docs +4 | 4.12.14-150100.197.145.1 | SUSE-SU-2023:2151-1 |
| SUSE Real Time Module 15 SP5 | kernel-rt +3 | 5.14.21-150500.13.5.1 | SUSE-SU-2023:2809-1 |
| SUSE Real Time Module 15 SP4 | kernel-rt +1 | 5.14.21-150400.15.28.2 | SUSE-SU-2023:2231-1 |
| SUSE Real Time Module 15 SP4 | kernel-syms-rt +1 | 5.14.21-150400.15.28.1 | SUSE-SU-2023:2231-1 |
| SUSE Real Time Module 15 SP3 | kernel-rt +3 | 5.3.18-150300.127.1 | SUSE-SU-2023:2147-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.125.1 | SUSE-SU-2023:2232-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.125.1 | SUSE-SU-2023:2232-1 |
| SUSE Manager Server 4.2 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SUSE Manager Server 4.2 | kernel-source +3 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SUSE Manager Proxy 4.2 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SUSE Manager Proxy 4.2 | kernel-source +2 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SUSE Enterprise Storage 7.1 | kernel-64kb +5 | 5.3.18-150300.59.121.2 | SUSE-SU-2023:2148-1 |
| SUSE Enterprise Storage 7.1 | kernel-default-base | 5.3.18-150300.59.121.2.150300.18.70.2 | SUSE-SU-2023:2148-1 |
| SUSE Enterprise Storage 7.1 | kernel-syms | 5.3.18-150300.59.121.1 | SUSE-SU-2023:2148-1 |
| SUSE Enterprise Storage 7 | kernel-default-base | 5.3.18-150200.24.151.1.150200.9.73.1 | SUSE-SU-2023:2146-1 |
| SUSE Enterprise Storage 7 | kernel-docs +5 | 5.3.18-150200.24.151.1 | SUSE-SU-2023:2146-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | dtb-aarch64 +10 | 5.14.21-150500.55.7.1 | SUSE-SU-2023:2871-1 |
| openSUSE Leap 15.5 | kernel-azure +2 | 5.14.21-150500.33.3.1 | SUSE-SU-2023:2646-1 |
| openSUSE Leap 15.5 | kernel-default-base | 5.14.21-150500.55.7.1.150500.6.2.5 | SUSE-SU-2023:2871-1 |
| openSUSE Leap 15.5 | kernel-rt +3 | 5.14.21-150500.13.5.1 | SUSE-SU-2023:2809-1 |
| openSUSE Leap 15.4 | dtb-aarch64 | 5.3.18-150300.59.121.1 | SUSE-SU-2023:2148-1, SUSE-SU-2023:2140-1 |
| openSUSE Leap 15.4 | kernel-64kb +5 | 5.14.21-150400.24.63.1 | SUSE-SU-2023:2140-1 |
| openSUSE Leap 15.4 | kernel-azure +2 | 5.14.21-150400.14.49.1 | SUSE-SU-2023:2141-1 |
| openSUSE Leap 15.4 | kernel-debug +4 | 4.12.14-150100.197.145.1 | SUSE-SU-2023:2151-1, SUSE-SU-2023:2140-1 |
| openSUSE Leap 15.4 | kernel-default-base | 5.14.21-150400.24.63.1.150400.24.27.1 | SUSE-SU-2023:2140-1 |
| openSUSE Leap 15.4 | kernel-rt +1 | 5.14.21-150400.15.28.2 | SUSE-SU-2023:2231-1 |
| openSUSE Leap 15.4 | kernel-syms-rt +1 | 5.14.21-150400.15.28.1 | SUSE-SU-2023:2231-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.3 | kernel-default | 5.14.21-150400.24.63.1 | SUSE-SU-2023:2140-1 |
| openSUSE Leap Micro 5.3 | kernel-default-base | 5.14.21-150400.24.63.1.150400.24.27.1 | SUSE-SU-2023:2140-1 |
| openSUSE Leap Micro 5.3 | kernel-rt | 5.14.21-150400.15.28.2 | SUSE-SU-2023:2231-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.19-30.43 | 1.0-0.amzn2023 | ALAS2023-2023-138 |
| Amazon Linux 2023 | perf +12 | 6.1.19-30.43.amzn2023 | ALAS2023-2023-138 |
| Amazon Linux 2 | kernel-livepatch-4.14.309-231.529 | 1.0-0.amzn2 | ALAS2-2023-1987 |
| Amazon Linux 2 | perf +8 | 4.14.309-231.529.amzn2 | ALAS2-2023-1987 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | hyperv-daemons | 5.15.118.1-1 | — |
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.111.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | bpftool | 7.0.0-284.25.1.0.1.el9_2 | ELSA-2023-4377 |
| Oracle Linux 9 | perf +25 | 5.14.0-284.25.1.0.1.el9_2 | ELSA-2023-4377 |
| Oracle Linux 8 | perf +19 | 4.18.0-513.5.1.el8_9 | ELSA-2023-7077 |
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.
Exploit-DB 1
- Linux Kernel 6.2 - Userspace Processes To Enable Mitigation EDB-51384 · local · Apr 20, 2023
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 46
- ALSA-2023:4378 Important: kernel-rt security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:4377 Important: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:7077 Important: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- USN-6256-1 linux-iot vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6222-1 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6740-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6739-1 linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6185-1 linux-aws, linux-azure, linux-bluefield, linux-gcp, linux-gke, linux-gkeop, linux-ibm, linux-kvm, linux-oracle, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6033-1 linux-oem-6.1 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6171-1 linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.19, linux-kvm, linux-lowlatency, linux-oracle, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6207-1 linux-intel-iotg vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6172-1 linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-azure-fde-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gke-5.15, linux-gkeop, linux-hwe-5.15, linux-ibm, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-oracle, linux-oracle-5.15, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6223-1 linux-azure-fde vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- RHSA-2024:3810 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2023:7077 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2023:5604 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2024:0412 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2023:6901 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2023:5603 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- WID-SEC-2024-0794 Dell ECS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- RHSA-2023:4378 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2023:4377 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- DLA-3404-1 linux-5.10 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3403-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ALAS2-2023-1987 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 8, 2026
- ALAS2023-2023-138 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 8, 2026
- RLSA-2023:4378 Important: kernel-rt security and bug fix update Rocky Linux Security Advisories · Feb 5, 2026
- SUSE-SU-2023:2141-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2151-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2805-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2646-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2162-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2871-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2146-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2148-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2231-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2163-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2140-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2147-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2232-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2809-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2156-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0988 Linux Kernel: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Nov 6, 2025
- WID-SEC-2024-1086 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 19, 2025
- ELSA-2023-7077 Important: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 17, 2023
- ELSA-2023-4377 Important: kernel security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 4, 2023
References
- https://github.com/google/security-research/security/advisories/GHSA-mj4w-6495-6crx
- https://github.com/torvalds/linux/commit/6921ed9049bc7457f66c1596c5b78aec0dae4a9d
- https://kernel.dance/#6921ed9049bc7457f66c1596c5b78aec0dae4a9d
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html