Description
In the Linux kernel, the following vulnerability has been resolved:
x86/entry_32: Clear CPU buffers after register restore in NMI return
CPU buffers are currently cleared after call to exc_nmi, but before
register state is restored. This may be okay for MDS mitigation but not for
RDFS. Because RDFS mitigation requires CPU buffers to be cleared when
registers don't have any sensitive data.
Move CLEAR_CPU_BUFFERS after RESTORE_ALL_NMI.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 5.10.215 – < 5.10.228, 5.15.154 – < 5.15.169, 6.1.81 – < 6.1.114, 6.6.21 – < 6.6.58, 6.7.9 – < 6.8, 6.8 | 5.10.228 |
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 | 6.11.5-1 | — |
| Debian 13 | linux | 6.11.5-1 | — |
| Debian 12 | linux | 6.1.115-1 | — |
| Debian 11 | linux | 5.10.234-1 | DLA-4075-1 |
| Debian 11 | linux-6.1 | 6.1.119-1~deb11u1 | DLA-4008-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1060.62 | — |
| Ubuntu 24.04 LTS | linux | 6.8.0-56.58 | USN-7383-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1025.27 | USN-7383-1 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1025.30 | USN-7384-1 |
| Ubuntu 24.04 LTS | linux-azure-6.11 | 6.11.0-1012.12~24.04.1 | — |
| Ubuntu 24.04 LTS | linux-azure-nvidia | 6.8.0-1014.15 | USN-7468-1 |
| Ubuntu 24.04 LTS | linux-gcp | 6.8.0-1026.28 | USN-7383-1 |
| Ubuntu 24.04 LTS | linux-gcp-6.11 | 6.11.0-1011.11~24.04.1 | — |
| Ubuntu 24.04 LTS | linux-gke | 6.8.0-1021.25 | USN-7383-1 |
| Ubuntu 24.04 LTS | linux-gkeop | 6.8.0-1008.10 | USN-7383-1 |
| Ubuntu 24.04 LTS | linux-ibm | 6.8.0-1022.22 | USN-7385-1 |
| Ubuntu 24.04 LTS | linux-nvidia | 6.8.0-1024.27 | USN-7383-1 |
| Ubuntu 24.04 LTS | linux-nvidia-6.11 | 6.11.0-1007.7 | — |
| Ubuntu 24.04 LTS | linux-nvidia-lowlatency | 6.8.0-1024.27.1 | USN-7383-1 |
| Ubuntu 24.04 LTS | linux-nvidia-tegra | 6.8.0-1004.4 | — |
| Ubuntu 24.04 LTS | linux-oem-6.11 | 6.11.0-1015.15 | USN-7310-1 |
| Ubuntu 24.04 LTS | linux-oem-6.8 | 6.8.0-1024.24 | USN-7386-1 |
| Ubuntu 24.04 LTS | linux-oracle | 6.8.0-1022.23 | USN-7383-1 |
| 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 | 6.8.0-56.58.1 | USN-7383-1 |
| Ubuntu 24.04 LTS | linux-xilinx | 6.8.0-1017.18 | — |
| Ubuntu 22.04 LTS | linux | 5.15.0-133.144 | USN-7288-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1078.85 | USN-7308-1 |
| 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 | 5.15.0-1081.90 | USN-7289-1 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1025.30~22.04.1 | USN-7384-2 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1081.90.1 | USN-7289-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1077.86 | USN-7291-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.8 | 6.8.0-1026.28~22.04.1 | USN-7383-1 |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1075.81 | USN-7291-1, USN-7289-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1060.68 | USN-7289-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 | 6.8.0-57.59~22.04.1 | USN-7403-1 |
| Ubuntu 22.04 LTS | linux-ibm | 5.15.0-1070.73 | USN-7289-3 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 | 6.8.0-1023.23~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1073.79 | USN-7289-4 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1076.81 | USN-7388-1 |
| Ubuntu 22.04 LTS | linux-lowlatency | 5.15.0-133.143 | USN-7288-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1072.73 | USN-7289-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.8 | 6.8.0-1024.27~22.04.1 | USN-7383-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1033.33 | USN-7389-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1021.21 | USN-7389-1 |
| Ubuntu 22.04 LTS | linux-oracle-6.8 | 6.8.0-1022.23~22.04.1 | USN-7383-1 |
| Ubuntu 22.04 LTS | linux-raspi | 5.15.0-1072.75 | USN-7305-1 |
| Ubuntu 22.04 LTS | linux-riscv +31 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv-6.8 +1 | 6.8.0-56.58.1~22.04.1 | USN-7383-1 |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1044.48 | USN-7390-1 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1080.87~20.04.1 | USN-7388-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1081.90~20.04.1 | USN-7289-2 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1081.90~20.04.1.1 | USN-7289-2 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1077.86~20.04.1 | USN-7291-1 |
| Ubuntu 20.04 LTS | linux-gke +27 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 | 5.15.0-134.145~20.04.1 | USN-7331-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1074.77~20.04.1 | USN-7458-1 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1073.79~20.04.2 | USN-7289-4 |
| Ubuntu 20.04 LTS | linux-lowlatency-hwe-5.15 | 5.15.0-133.143~20.04.1 | USN-7288-2 |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1075.81~20.04.1 | USN-7289-2 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1073.77~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
Show 6 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 | 6.8.1-1018.19 | USN-7383-2 |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1071.73 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1078.86 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1018.19~22.04.1 | — |
| 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 | 5.15.0-1078.85+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1080.89+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-133.144+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1077.86+fips1 | — |
| Ubuntu Pro 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1039.39~20.04.1 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 6.11.8-1.1 | openSUSE-SU-2024:14500-1 |
| openSUSE Tumbleweed | kernel-source-longterm | 6.12.11-1.1 | openSUSE-SU-2025:14705-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | kernel | 6.6.64.2-1 | — |
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.173.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | bpftool +13 | 5.15.0-303.171.5.2.el9uek | ELSA-2024-12887 |
Advisories 34
- USN-7468-1 linux-azure-nvidia 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-7310-1 linux-oem-6.11 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7384-2 linux-azure-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7384-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7383-1 linux, linux-aws, linux-gcp, linux-gcp-6.8, linux-gke, linux-gkeop, linux-lowlatency, linux-lowlatency-hwe-6.8, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency, linux-oracle, linux-oracle-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7458-1 linux-ibm-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7289-2 linux-azure-5.15, linux-azure-fde-5.15, linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7289-1 linux-azure, linux-azure-fde, linux-gkeop, linux-nvidia, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7289-3 linux-ibm vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7388-1 linux-aws-5.15, linux-kvm vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7389-1 linux-nvidia-tegra, linux-nvidia-tegra-igx vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7386-1 linux-oem-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7383-2 linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7291-1 linux-gcp, linux-gcp-5.15, linux-gke vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7390-1 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7403-1 linux-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7288-1 linux, linux-lowlatency vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7289-4 linux-intel-iotg, linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7385-1 linux-ibm vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7308-1 linux-aws vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7331-1 linux-hwe-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7305-1 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7288-2 linux-lowlatency-hwe-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- DLA-4008-1 linux-6.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4075-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ICSA-25-226-07 Siemens Third-Party Components in SINEC OS CISA ICS & IT advisories · Feb 25, 2026
- SSA-355557 SSA-355557: Multiple Vulnerabilities in Third-Party Components in SINEC OS before V3.2 Siemens ProductCERT · Feb 24, 2026
- WID-SEC-2024-3376 Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Feb 16, 2026
- openSUSE-SU-2025:14705-1 kernel-devel-longterm-6.12.11-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14500-1 kernel-devel-6.11.8-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2024-12887 Important: Unbreakable Enterprise kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Dec 18, 2024
References
- https://git.kernel.org/stable/c/6f44a5fc15b5cece0785bc07453db77d99b0a6de
- https://git.kernel.org/stable/c/b6400eb0b347821efc57760221f8fb6d63b9548a
- https://git.kernel.org/stable/c/43778de19d2ef129636815274644b9c16e78c66b
- https://git.kernel.org/stable/c/227358e89703c344008119be7e8ffa3fdb5b92de
- https://git.kernel.org/stable/c/64adf22c4bc73ede920baca5defefb70f190cdbc
- https://git.kernel.org/stable/c/48a2440d0f20c826b884e04377ccc1e4696c84e9