Description
In the Linux kernel before 6.6.7, an untrusted VMM can trigger int80 syscall handling at any given point. This is related to arch/x86/coco/tdx/tdx.c and arch/x86/mm/mem_encrypt_amd.c.
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 | 6.6.8-1 | — |
| Debian 13 | linux | 6.6.8-1 | — |
| Debian 12 | linux | 6.1.69-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1056.58 | — |
| Ubuntu 24.04 LTS | linux-raspi | 6.7.0-1001.1 | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-125.135 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1072.78 | USN-7100-2 |
| Ubuntu 22.04 LTS | linux-aws-6.5 +1 | 6.5.0-1015.15~22.04.1 | USN-6680-3, USN-6680-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1075.84 | USN-7123-1 |
| Ubuntu 22.04 LTS | linux-azure-6.5 | 6.5.0-1016.16~22.04.1 | USN-6680-2 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1076.85.1 | — |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1071.79 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1069.75 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1055.62 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.5 | 6.5.0-25.25~22.04.1 | USN-6680-2 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1065.68 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1067.73 | USN-7144-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1069.74 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1067.68 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.5 | 6.5.0-1014.14 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1032.32 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1020.20 | — |
| Ubuntu 22.04 LTS | linux-oem-6.5 | 6.5.0-1016.17 | USN-6680-1 |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1070.76 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-riscv +22 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv-6.5 +1 | 6.5.0-25.25.1~22.04.1 | USN-6680-1 |
| Ubuntu 22.04 LTS | linux-starfive-6.5 | 6.5.0-1009.10~22.04.1 | USN-6680-1 |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1038.42 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1072.78~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1078.87~20.04.1 | USN-7194-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1071.79~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-gke +27 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1055.62~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-125.135~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1065.68~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1067.73~20.04.1 | USN-7144-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1032.32~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1070.76~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1068.72~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 12 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 | 5.15.0-1066.68 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1073.81 | — |
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-aws-fips | 5.15.0-1072.78+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1075.84+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-125.135+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1071.79+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2109.115 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2088.94 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1125.136 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2072.77 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | linux +10 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux | 4.15.0-227.239 | USN-6926-1 |
| Ubuntu Pro 18.04 LTS | linux-aws | 4.15.0-1170.183 | USN-6926-1 |
| Ubuntu Pro 18.04 LTS | linux-aws-5.4 +6 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux-azure-4.15 | 4.15.0-1179.194 | USN-6926-2 |
| Ubuntu Pro 18.04 LTS | linux-gcp-4.15 | 4.15.0-1164.181 | USN-6926-1 |
| Ubuntu Pro 18.04 LTS | linux-kvm | 4.15.0-1154.159 | USN-6926-1 |
| Ubuntu Pro 18.04 LTS | linux-oracle | 4.15.0-1133.144 | USN-6926-1 |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1170.183~16.04.1 | USN-6926-1 |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1179.194~16.04.1 | USN-6926-3 |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1164.181~16.04.1 | USN-6926-1 |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-227.239~16.04.1 | USN-6926-1 |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1133.144~16.04.1 | USN-6926-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1179.194~14.04.1 | USN-6926-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | bpftool | 7.3.0-427.13.1.el9_4 | RHSA-2024:2394 |
| RHEL 9 | rv +64 | 5.14.0-427.13.1.el9_4 | RHSA-2024:2394 |
| RHEL 8 | kernel-rt +12 | 4.18.0-553.5.1.rt7.346.el8_10 | RHSA-2024:3627 |
| RHEL 8 | perf +26 | 4.18.0-553.5.1.el8_10 | RHSA-2024:3618 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | bpftool | 7.0.0-284.66.1.el9_2 | RHSA-2024:2845 |
| RHEL 9.2 EUS | kernel-rt +14 | 5.14.0-284.66.1.rt14.351.el9_2 | RHSA-2024:2846 |
| RHEL 9.2 EUS | perf +47 | 5.14.0-284.66.1.el9_2 | RHSA-2024:2845 |
| RHEL 8.8 EUS | perf +26 | 4.18.0-477.55.1.el8_8 | RHSA-2024:2621 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | bpftool | 7.3.0-427.13.1.el9_4 | ALSA-2024:2394 |
| AlmaLinux 9 | rv +60 | 5.14.0-427.13.1.el9_4 | ALSA-2024:2394 |
| AlmaLinux 8 | kernel-rt +11 | 4.18.0-553.5.1.rt7.346.el8_10 | ALSA-2024:3627 |
| AlmaLinux 8 | perf +24 | 4.18.0-553.5.1.el8_10 | ALSA-2024:3618 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | kernel | 4.18.0-553.5.1.el8_10 | RLSA-2024:3618 |
| Rocky Linux 8 | kernel-rt | 4.18.0-553.5.1.rt7.346.el8_10 | RLSA-2024:3627 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | kernel-64kb +6 | 5.14.21-150500.55.52.1 | SUSE-SU-2024:0858-1 |
| SLES 15 SP5 | kernel-azure +2 | 5.14.21-150500.33.37.1 | SUSE-SU-2024:0855-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.52.1.150500.6.23.1 | SUSE-SU-2024:0858-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 5.5 | kernel-default | 5.14.21-150500.55.52.1 | SUSE-SU-2024:0858-1 |
| SLE Micro 5.5 | kernel-default-base | 5.14.21-150500.55.52.1.150500.6.23.1 | SUSE-SU-2024:0858-1 |
| SLE Micro 5.5 | kernel-rt +1 | 5.14.21-150500.13.38.1 | SUSE-SU-2024:0910-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.52.1 | SUSE-SU-2024:0858-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_11 +1 | 1-150500.11.3.1 | SUSE-SU-2024:0910-1, SUSE-SU-2024:0858-1 |
| SUSE Real Time Module 15 SP5 | kernel-rt +3 | 5.14.21-150500.13.38.1 | SUSE-SU-2024:0910-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | dtb-aarch64 +10 | 5.14.21-150500.55.52.1 | SUSE-SU-2024:0858-1 |
| openSUSE Leap 15.5 | kernel-azure +2 | 5.14.21-150500.33.37.1 | SUSE-SU-2024:0855-1 |
| openSUSE Leap 15.5 | kernel-default-base | 5.14.21-150500.55.52.1.150500.6.23.1 | SUSE-SU-2024:0858-1 |
| openSUSE Leap 15.5 | kernel-rt +3 | 5.14.21-150500.13.38.1 | SUSE-SU-2024:0910-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.72-96.166 | 1.0-0.amzn2023 | ALAS2023-2024-488 |
| Amazon Linux 2023 | perf +14 | 6.1.72-96.166.amzn2023 | ALAS2023-2024-488 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | kernel-uek +16 | 5.15.0-308.179.6.el9uek | ELSA-2025-20320 |
| Oracle Linux 8 | perf +19 | 4.18.0-553.5.1.el8_10 | ELSA-2025-20320, ELSA-2024-3618 |
Advisories 29
- RHSA-2024:3627 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- USN-7100-1 linux, linux-aws-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-gkeop-5.15, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle, linux-oracle-5.15, linux-raspi, linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7144-1 linux-intel-iotg, linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7194-1 linux-azure-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7100-2 linux-aws vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7123-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- ALSA-2024:2394 Important: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:3627 Moderate: kernel-rt security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:3618 Moderate: kernel update AlmaLinux Security Advisories · Oct 29, 2026
- USN-6926-3 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6926-1 linux, linux-aws, linux-aws-hwe, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6926-2 linux-azure, linux-azure-4.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6680-1 linux, linux-gcp, linux-gcp-6.5, linux-laptop, linux-lowlatency, linux-lowlatency-hwe-6.5, linux-oem-6.5, linux-oracle, linux-raspi, linux-starfive, linux-starfive-6.5 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6680-2 linux-azure, linux-azure-6.5, linux-hwe-6.5 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6680-3 linux-aws, linux-aws-6.5 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- RHSA-2024:2394 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2024:2621 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2024:3618 Red Hat Security Advisory: kernel update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:2845 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2024:2846 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- ALAS2023-2024-488 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 3, 2026
- RLSA-2024:3627 Moderate: kernel-rt security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2024:3618 Moderate: kernel update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2024:0858-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0855-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0910-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-0344 Linux Kernel: Schwachstelle ermöglicht nicht spezifizierten Angriff BSI CERT-Bund (WID) · May 13, 2025
- ELSA-2025-20320 Important: Unbreakable Enterprise kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 11, 2025
- ELSA-2024-3618 Moderate: kernel update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 5, 2024