Description
A race condition in the x86 KVM subsystem in the Linux kernel through 6.1-rc6 allows guest OS users to cause a denial of service (host OS crash or host OS memory corruption) when nested virtualisation and the TDP MMU are enabled.
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 | 6.0.12-1 | — |
| Debian 13 | linux | 6.0.12-1 | — |
| Debian 12 | linux | 6.0.12-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1014.16 | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-67.74 | USN-5912-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1031.35 | USN-5912-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1034.41 | USN-5912-1 |
| Ubuntu 22.04 LTS | linux-azure-5.19 | 5.19.0-1021.22~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1034.41.1 | USN-5912-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1030.37 | USN-5912-1 |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1028.33 | USN-5912-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1016.21 | USN-5938-1 |
| Ubuntu 22.04 LTS | linux-hwe-5.19 | 5.19.0-35.36~22.04.1 | USN-5911-1 |
| Ubuntu 22.04 LTS | linux-ibm | 5.15.0-1026.29 | USN-5935-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1026.31 | USN-5962-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1029.34 | USN-5941-1 |
| Ubuntu 22.04 LTS | linux-lowlatency-hwe-5.19 | 5.19.0-1018.19~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1023.23 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1030.36 | USN-5912-1 |
| Ubuntu 22.04 LTS | linux-raspi | 5.15.0-1025.27 | USN-5935-1 |
| Ubuntu 22.04 LTS | linux-riscv +8 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1031.35~20.04.1 | USN-5912-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1034.41~20.04.1 | USN-5912-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1034.41~20.04.1.2 | — |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1030.37~20.04.1 | USN-5912-1 |
| Ubuntu 20.04 LTS | linux-gke-5.15 | 5.15.0-1028.33~20.04.1 | USN-5912-1 |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1016.21~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-67.74~20.04.1 | USN-5912-1 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1026.31~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1030.36~20.04.1 | USN-5912-1 |
| Ubuntu 20.04 LTS | linux-riscv +23 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1030.34~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
Show 2 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 | 5.15.0-1022.27 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1033.36 | — |
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 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | perf +2 | 4.18.0-372.95.1.el8_6 | RHSA-2024:1188 |
| RHEL 8.8 EUS | perf +26 | 4.18.0-477.51.1.el8_8 | RHSA-2024:1404 |
| RHEL 8.6 EUS | perf +26 | 4.18.0-372.95.1.el8_6 | RHSA-2024:1188 |
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 SP4 | kernel-64kb +6 | 5.14.21-150400.24.38.1 | SUSE-SU-2022:4585-1 |
| SLES 15 SP4 | kernel-azure +2 | 5.14.21-150400.14.28.1 | SUSE-SU-2022:4504-1 |
| SLES 15 SP4 | kernel-default-base | 5.14.21-150400.24.38.1.150400.24.13.2 | SUSE-SU-2022:4585-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Live Patching 15 SP4 | kernel-default | 5.14.21-150400.24.38.1 | SUSE-SU-2022:4585-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4-RT_Update_1 | 1-150400.1.3.1 | SUSE-SU-2022:4617-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_6 | 1-150400.9.3.2 | SUSE-SU-2022:4585-1 |
| SUSE Real Time Module 15 SP4 | kernel-rt +3 | 5.14.21-150400.15.5.1 | SUSE-SU-2022:4617-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | dtb-aarch64 +10 | 5.14.21-150400.24.38.1 | SUSE-SU-2022:4585-1 |
| openSUSE Leap 15.4 | kernel-azure +2 | 5.14.21-150400.14.28.1 | SUSE-SU-2022:4504-1 |
| openSUSE Leap 15.4 | kernel-default-base | 5.14.21-150400.24.38.1.150400.24.13.2 | SUSE-SU-2022:4585-1 |
| openSUSE Leap 15.4 | kernel-rt +3 | 5.14.21-150400.15.5.1 | SUSE-SU-2022:4617-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.10-15.42 | 1.0-0.amzn2023 | ALAS2023-2023-070 |
| Amazon Linux 2023 | perf +12 | 6.1.10-15.42.amzn2023 | ALAS2023-2023-070 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.82.1-1 | — |
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 | kernel-uek +10 | 5.15.0-7.86.6.1.el9uek | ELSA-2023-12116 |
| Oracle Linux 8 | kernel-uek-container +1 | 5.15.0-7.86.6.1.el8uek | ELSA-2023-12120 |
| Oracle Linux 8 | perf +19 | 4.18.0-513.5.1.el8_9 | ELSA-2023-12116, ELSA-2023-7077 |
Advisories 26
- 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-5935-1 linux-ibm, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-5938-1 linux-gkeop vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-5941-1 linux-kvm vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-5962-1 linux-intel-iotg vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-5911-1 linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.19, linux-ibm, linux-lowlatency, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-5912-1 linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-azure-fde, linux-gcp, linux-gcp-5.15, linux-gke, linux-gke-5.15, linux-hwe-5.15, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-oracle, linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- RHSA-2023:7077 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2024:1404 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-2024:1188 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · 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
- RLSA-2023:4378 Important: kernel-rt security and bug fix update Rocky Linux Security Advisories · Feb 5, 2026
- SUSE-SU-2022:4617-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4585-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-1086 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 19, 2025
- SUSE-SU-2022:4504-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ALAS2023-2023-070 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 10, 2024
- WID-SEC-2022-2197 Linux Kernel: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Mar 20, 2024
- 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
- ELSA-2023-12116 Important: Unbreakable Enterprise kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 13, 2023
- ELSA-2023-12120 Important: Unbreakable Enterprise kernel-container security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 13, 2023