Description
In the Linux kernel, the following vulnerability has been resolved:
KVM: SEV: Compute the correct max length of the in-GHCB scratch area
When setting the length of the GHCB scratch area, and the area is in the
GHCB shared buffer, set the effective length of the scratch area to the max
possible size given the start of the guest-provided pointer, and the end of
the shared buffer.
The code was "fine" when first introduced, as KVM doesn't consult the
length of the buffer when emulating MMIO, because the passed in @len always
specifies the *max* size required. But for PSC requests, the incoming @len
is just the minimum length (to process the header), and KVM needs to know
the full size of the scratch area to avoid buffer overflows (spoiler alert).
Opportunistically rename @len => @min_len to better reflect its role.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 6.11 | 6.12.93 |
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 | 7.0.12-1 | — |
| Debian 13 | linux | 6.12.94-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | linux | 7.0.0-28.28 | — |
| Ubuntu 26.04 LTS | linux-aws +2 | 7.0.0-1009.9 | USN-8618-1, USN-8603-1 |
| Ubuntu 26.04 LTS | linux-gcp +1 | 7.0.0-1008.8 | USN-8593-1 |
| Ubuntu 26.04 LTS | linux-gke | 7.0.0-1003.4 | — |
| Ubuntu 26.04 LTS | linux-ibm +1 | 7.0.0-1010.10 | USN-8603-1, USN-8593-1 |
| Ubuntu 26.04 LTS | linux-nvidia | 7.0.0-1016.16 | USN-8663-1 |
| Ubuntu 26.04 LTS | linux-nvidia-bos | 7.0.0-2016.16 | USN-8664-1 |
| Ubuntu 26.04 LTS | linux-raspi | 7.0.0-1015.15 | USN-8618-1 |
| Ubuntu 26.04 LTS | linux-riscv +1 | 7.0.0-28.28.1 | — |
| Ubuntu 24.04 LTS | linux-azure-7.0 | 7.0.0-1014.14~24.04.1 | USN-8728-2 |
| Ubuntu 24.04 LTS | linux-azure-fde-7.0 | 7.0.0-1013.13~24.04.1 | — |
| Ubuntu 24.04 LTS | linux-gcp-7.0 +1 | 7.0.0-1011.11~24.04.1 | USN-8728-3, USN-8728-1 |
| Ubuntu 24.04 LTS | linux-hwe-7.0 | 7.0.0-28.28~24.04.1 | — |
| Ubuntu 24.04 LTS | linux-nvidia-7.0 | 7.0.0-1016.16~24.04.1 | USN-8663-1 |
| Ubuntu 24.04 LTS | linux-riscv +26 | No fix yet | — |
| Ubuntu 24.04 LTS | linux-riscv-7.0 | 7.0.0-28.28.1~24.04.3 | — |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | 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 24.04 LTS | linux-realtime-6.14 +1 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | kernel-64kb +7 | 6.4.0-150700.53.78.1 | SUSE-SU-2026:3790-1 |
| SLES 15 SP7 | kernel-default-base | 6.4.0-150700.53.78.1.150700.17.43.2 | SUSE-SU-2026:3790-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | kernel-64kb +8 | 6.12.0-160000.37.1 | SUSE-SU-2026:23231-1, SUSE-SU-2026:23221-1 |
| SLES for SAP 16.0 | kernel-default-base | 6.12.0-160000.37.1.160000.2.19 | SUSE-SU-2026:23231-1, SUSE-SU-2026:23221-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_0 | 20-160000.4.3 | SUSE-SU-2026:24453-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_1 | 18-160000.1.1 | SUSE-SU-2026:24458-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_12 | 7-160000.1.1 | SUSE-SU-2026:24448-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_13 | 7-160000.1.2 | SUSE-SU-2026:24447-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_2 | 16-160000.1.1 | SUSE-SU-2026:24452-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_3 | 15-160000.1.1 | SUSE-SU-2026:24444-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_4 | 14-160000.1.1 | SUSE-SU-2026:24443-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_5 | 13-160000.1.1 | SUSE-SU-2026:24457-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_6 | 12-160000.1.1 | SUSE-SU-2026:24451-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_7 | 11-160000.1.1 | SUSE-SU-2026:24450-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_8 | 10-160000.1.1 | SUSE-SU-2026:24456-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_9 +2 | 9-160000.1.1 | SUSE-SU-2026:24455-1, SUSE-SU-2026:24454-1, SUSE-SU-2026:24449-1 |
| SLES 16.0 | kernel-64kb +8 | 6.12.0-160000.37.1 | SUSE-SU-2026:23237-1, SUSE-SU-2026:23231-1, SUSE-SU-2026:23221-1 |
| SLES 16.0 | kernel-default-base | 6.12.0-160000.37.1.160000.2.19 | SUSE-SU-2026:23231-1, SUSE-SU-2026:23221-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_0 | 20-160000.4.3 | SUSE-SU-2026:24453-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_1 | 18-160000.1.1 | SUSE-SU-2026:24458-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_12 | 7-160000.1.1 | SUSE-SU-2026:24448-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_13 | 7-160000.1.2 | SUSE-SU-2026:24447-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_2 | 16-160000.1.1 | SUSE-SU-2026:24452-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_3 | 15-160000.1.1 | SUSE-SU-2026:24444-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_4 | 14-160000.1.1 | SUSE-SU-2026:24443-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_5 | 13-160000.1.1 | SUSE-SU-2026:24457-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_6 | 12-160000.1.1 | SUSE-SU-2026:24451-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_7 | 11-160000.1.1 | SUSE-SU-2026:24450-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_8 | 10-160000.1.1 | SUSE-SU-2026:24456-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_9 +2 | 9-160000.1.1 | SUSE-SU-2026:24455-1, SUSE-SU-2026:24454-1, SUSE-SU-2026:24449-1 |
| SLE Micro 6.2 | kernel-default-base | 6.12.0-160000.37.1.160000.2.19 | SUSE-SU-2026:23068-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16-RT_Update_0 | 18-160000.3.4 | SUSE-SU-2026:24402-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16-RT_Update_1 | 17-160000.1.1 | SUSE-SU-2026:24401-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_0 | 20-160000.4.3 | SUSE-SU-2026:24429-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_1 | 18-160000.1.1 | SUSE-SU-2026:24434-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_12 +2 | 7-160000.1.1 | SUSE-SU-2026:24424-1, SUSE-SU-2026:24396-1, SUSE-SU-2026:24395-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_13 | 7-160000.1.2 | SUSE-SU-2026:24423-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_2 | 16-160000.1.1 | SUSE-SU-2026:24428-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_3 +1 | 15-160000.1.1 | SUSE-SU-2026:24420-1, SUSE-SU-2026:24400-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_4 +2 | 14-160000.1.1 | SUSE-SU-2026:24419-1, SUSE-SU-2026:24399-1, SUSE-SU-2026:24398-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_5 +1 | 13-160000.1.1 | SUSE-SU-2026:24433-1, SUSE-SU-2026:24397-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_6 +1 | 12-160000.1.1 | SUSE-SU-2026:24427-1, SUSE-SU-2026:24389-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_7 +1 | 11-160000.1.1 | SUSE-SU-2026:24426-1, SUSE-SU-2026:24388-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_8 +1 | 10-160000.1.1 | SUSE-SU-2026:24432-1, SUSE-SU-2026:24403-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_9 +5 | 9-160000.1.1 | SUSE-SU-2026:24431-1, SUSE-SU-2026:24430-1, SUSE-SU-2026:24425-1 |
| SLE Micro 6.2 | kernel-rt +5 | 6.12.0-160000.37.1 | SUSE-SU-2026:23068-1, SUSE-SU-2026:23066-1 |
| SLE Live Patching 15 SP7 | kernel-default | 6.4.0-150700.53.78.1 | SUSE-SU-2026:3790-1 |
| SLE Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7-RT_Update_10 | 11-150700.2.1 | SUSE-SU-2026:4714-1 |
| SLE Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7-RT_Update_19 | 1-150700.1.5.1 | SUSE-SU-2026:3810-1 |
| SLE Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_20 | 1-150700.15.3.2 | SUSE-SU-2026:3790-1 |
| SUSE Real Time Module 15 SP7 | kernel-rt +2 | 6.4.0-150700.7.72.1 | SUSE-SU-2026:3810-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | kernel-default-base | 6.12.0-160000.37.1.160000.2.19 | openSUSE-SU-2026:21555-1 |
| openSUSE Leap 16.0 | kernel-rt +11 | 6.12.0-160000.37.1 | openSUSE-SU-2026:21555-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.18.35-68.127 +1 | 1:1.0-0.amzn2023 | ALAS2023-2026-1968, ALAS2023-2026-1881 |
| Amazon Linux 2023 | perf6.12 +11 | 1:6.12.94-123.174.amzn2023 | ALAS2023-2026-1968 |
| Amazon Linux 2023 | perf6.18 +12 | 1:6.18.35-68.127.amzn2023 | ALAS2023-2026-1881 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | kernel-uek +34 | 6.12.0-206.104.3.3.el10uek | ELSA-2026-500248 |
Advisories 50
- USN-8593-1 linux-ibm, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Nov 13, 2026
- USN-8663-1 linux-nvidia, linux-nvidia-7.0 vulnerabilities Ubuntu Security Notices (USN) · Nov 13, 2026
- USN-8728-1 linux-gcp-7.0 vulnerabilities Ubuntu Security Notices (USN) · Nov 13, 2026
- USN-8618-1 linux-aws, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 13, 2026
- USN-8728-3 linux-oracle-7.0 vulnerabilities Ubuntu Security Notices (USN) · Nov 13, 2026
- USN-8728-2 linux-azure-7.0 vulnerabilities Ubuntu Security Notices (USN) · Nov 13, 2026
- USN-8603-1 linux-azure, linux-azure-fde vulnerabilities Ubuntu Security Notices (USN) · Nov 13, 2026
- USN-8664-1 linux-nvidia-bos vulnerabilities Ubuntu Security Notices (USN) · Nov 13, 2026
- WID-SEC-2026-2403 Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Nov 12, 2026
- SUSE-SU-2026:24454-1 Security update for the Linux Kernel (Live Patch 11 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24458-1 Security update for the Linux Kernel (Live Patch 1 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24450-1 Security update for the Linux Kernel (Live Patch 7 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24451-1 Security update for the Linux Kernel (Live Patch 6 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24452-1 Security update for the Linux Kernel (Live Patch 2 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24453-1 Security update for the Linux Kernel (Live Patch 0 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24455-1 Security update for the Linux Kernel (Live Patch 10 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24447-1 Security update for the Linux Kernel (Live Patch 13 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24456-1 Security update for the Linux Kernel (Live Patch 8 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24448-1 Security update for the Linux Kernel (Live Patch 12 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24457-1 Security update for the Linux Kernel (Live Patch 5 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24449-1 Security update for the Linux Kernel (Live Patch 9 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24443-1 Security update for the Linux Kernel (Live Patch 4 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24444-1 Security update for the Linux Kernel (Live Patch 3 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Nov 1, 2026
- SUSE-SU-2026:24424-1 Security update for the Linux Kernel (Live Patch 12 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24432-1 Security update for the Linux Kernel (Live Patch 8 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24425-1 Security update for the Linux Kernel (Live Patch 9 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24433-1 Security update for the Linux Kernel (Live Patch 5 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24426-1 Security update for the Linux Kernel (Live Patch 7 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24434-1 Security update for the Linux Kernel (Live Patch 1 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24428-1 Security update for the Linux Kernel (Live Patch 2 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24429-1 Security update for the Linux Kernel (Live Patch 0 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24430-1 Security update for the Linux Kernel (Live Patch 11 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24423-1 Security update for the Linux Kernel (Live Patch 13 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24431-1 Security update for the Linux Kernel (Live Patch 10 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24427-1 Security update for the Linux Kernel (Live Patch 6 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24419-1 Security update for the Linux Kernel (Live Patch 4 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24420-1 Security update for the Linux Kernel (Live Patch 3 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24399-1 Security update for the Linux Kernel RT (Live Patch 3 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24400-1 Security update for the Linux Kernel RT (Live Patch 2 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24401-1 Security update for the Linux Kernel RT (Live Patch 1 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24391-1 Security update for the Linux Kernel RT (Live Patch 10 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24402-1 Security update for the Linux Kernel RT (Live Patch 0 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24403-1 Security update for the Linux Kernel RT (Live Patch 8 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24397-1 Security update for the Linux Kernel RT (Live Patch 5 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24398-1 Security update for the Linux Kernel RT (Live Patch 4 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24389-1 Security update for the Linux Kernel RT (Live Patch 6 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24390-1 Security update for the Linux Kernel RT (Live Patch 11 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24392-1 Security update for the Linux Kernel RT (Live Patch 9 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24395-1 Security update for the Linux Kernel RT (Live Patch 13 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026
- SUSE-SU-2026:24396-1 Security update for the Linux Kernel RT (Live Patch 12 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Oct 30, 2026