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Critical · 9.3 CVE-2025-38560 EUVD-2025-27903GHSA-rcx5-mm72-w6xv

x86/sev: Evict cache lines during SNP memory validation

Published Aug 19, 2025 · Updated Oct 15, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: kernel Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-aws-6.14 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-6.8 Package: linux-aws-fips Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.8 Package: linux-azure-6.11 Package: linux-azure-6.14 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-6.8 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.14 Package: linux-azure-fde-6.2 Package: linux-azure-fde-6.8 Package: linux-azure-fips Package: linux-azure-nvidia Package: linux-azure-nvidia-6.14 Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.15 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gcp-6.11 Package: linux-gcp-6.14 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-6.8 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.19 Package: linux-hwe-5.8 Package: linux-hwe-6.11 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-6.8 Package: linux-intel Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-lowlatency Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.11 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.11 Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency Package: linux-nvidia-tegra Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.11 Package: linux-oem-6.14 Package: linux-oem-6.5 Package: linux-oem-6.8 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-oracle-6.14 Package: linux-oracle-6.5 Package: linux-oracle-6.8 Package: linux-raspi Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.14 Package: linux-realtime-6.8 Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.14 Package: linux-riscv-6.5 Package: linux-riscv-6.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx Platform: Linux Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

In the Linux kernel, the following vulnerability has been resolved:

x86/sev: Evict cache lines during SNP memory validation

An SNP cache coherency vulnerability requires a cache line eviction
mitigation when validating memory after a page state change to private.
The specific mitigation is to touch the first and last byte of each 4K
page that is being validated. There is no need to perform the mitigation
when performing a page state change to shared and rescinding validation.

CPUID bit Fn8000001F_EBX[31] defines the COHERENCY_SFW_NO CPUID bit
that, when set, indicates that the software mitigation for this
vulnerability is not needed.

Implement the mitigation and invoke it when validating memory (making it
private) and the COHERENCY_SFW_NO bit is not set, indicating the SNP
guest is vulnerable.

Affected products

VendorProductAffectedFixed
Linux Linux 5.19 6.1.148

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.

ReleasePackageFixed inAdvisory
Debian 14 linux 6.16.3-1 —
Debian 13 linux 6.12.43-1 —
Debian 12 linux 6.1.148-1 —
Debian 11 linux-6.1 6.1.153-1~deb11u1 DLA-4328-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 24.04 LTS linux-bluefield 6.8.0-1016.20 —
Ubuntu 25.10 linux-azure-fde No fix yet —
Ubuntu 24.04 LTS linux 6.8.0-100.100 USN-8028-1
Ubuntu 24.04 LTS linux-aws +1 6.8.0-1046.49 USN-8028-5
Ubuntu 24.04 LTS linux-aws-6.14 +2 6.14.0-1017.17~24.04.1 USN-7934-1, USN-7879-3
Ubuntu 24.04 LTS linux-azure 6.8.0-1046.52 USN-8074-1
Ubuntu 24.04 LTS linux-azure-fde 6.8.0-1046.53 —
Ubuntu 24.04 LTS linux-azure-nvidia 6.8.0-1039.42 —
Ubuntu 24.04 LTS linux-gcp 6.8.0-1047.50 USN-8031-3
Ubuntu 24.04 LTS linux-gcp-6.14 6.14.0-1020.21~24.04.1 USN-7879-4
Ubuntu 24.04 LTS linux-gke 6.8.0-1043.48 USN-8031-3
Ubuntu 24.04 LTS linux-gkeop 6.8.0-1030.33 USN-8028-5
Ubuntu 24.04 LTS linux-hwe-6.14 6.14.0-36.36~24.04.1 USN-7879-1
Ubuntu 24.04 LTS linux-ibm 6.8.0-1044.44 USN-8028-8
Ubuntu 24.04 LTS linux-intel +12 No fix yet —
Ubuntu 24.04 LTS linux-lowlatency 6.8.0-100.100.1 USN-8052-1
Ubuntu 24.04 LTS linux-nvidia-lowlatency 6.8.0-1046.49.1 USN-8028-7
Ubuntu 24.04 LTS linux-nvidia-tegra 6.8.0-1020.20 —
Ubuntu 24.04 LTS linux-oem-6.14 6.14.0-1016.16 USN-7880-1
Ubuntu 24.04 LTS linux-oracle 6.8.0-1043.44 USN-8028-5
Ubuntu 24.04 LTS linux-raspi 6.8.0-1047.51 USN-8028-1
Ubuntu 24.04 LTS linux-riscv-6.14 6.14.0-36.36.1~24.04.1 —
Ubuntu 24.04 LTS linux-xilinx 6.8.0-1023.24 USN-8052-2
Ubuntu 22.04 LTS linux-aws-6.8 +1 6.8.0-1046.49~22.04.1 USN-8028-5
Ubuntu 22.04 LTS linux-azure-6.8 6.8.0-1051.57~22.04.1 USN-8126-1
Ubuntu 22.04 LTS linux-azure-fde-6.8 6.8.0-1046.53~22.04.1 —
Ubuntu 22.04 LTS linux-gcp +33 No fix yet —
Ubuntu 22.04 LTS linux-gcp-6.8 6.8.0-1047.50~22.04.2 USN-8031-1
Ubuntu 22.04 LTS linux-hwe-6.8 +1 6.8.0-100.100~22.04.1 USN-8028-6
Ubuntu 22.04 LTS linux-ibm-6.8 6.8.0-1044.44~22.04.1 USN-8028-8
Ubuntu 22.04 LTS linux-lowlatency-hwe-6.8 6.8.0-100.100.1~22.04.1 USN-8028-6
Ubuntu 22.04 LTS linux-oracle-6.8 6.8.0-1043.44~22.04.1 USN-8028-5
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Show 8 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2037.38 USN-8028-3
Ubuntu Pro Realtime 24.04 LTS linux-realtime 6.8.1-1041.42 USN-8028-3
Ubuntu Pro Realtime 24.04 LTS linux-realtime-6.14 6.14.0-1016.16~24.04.1 USN-7879-2
Ubuntu Pro Realtime 22.04 LTS linux-realtime-6.8 6.8.1-1041.42~22.04.1 USN-8028-2
Ubuntu Pro FIPS-updates 24.04 LTS linux-aws-fips 6.8.0-1046.49+fips1 USN-8028-4
Ubuntu Pro FIPS-updates 24.04 LTS linux-azure-fips 6.8.0-1046.52+fips1 USN-8074-2
Ubuntu Pro FIPS-updates 24.04 LTS linux-fips 6.8.0-100.100+fips1 USN-8028-4
Ubuntu Pro FIPS-updates 24.04 LTS linux-gcp-fips 6.8.0-1047.50+fips1 USN-8031-2
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips No fix yet —
Ubuntu Pro FIPS-preview 22.04 LTS linux-gcp-fips No fix yet —
Ubuntu Pro 20.04 LTS linux-gcp-5.15 No fix yet —
ReleasePackageFixed inAdvisory
SLES 15 SP7 kernel-64kb +6 6.4.0-150700.53.16.1 SUSE-SU-2025:03290-1
SLES 15 SP7 kernel-azure +1 6.4.0-150700.20.15.2 SUSE-SU-2025:03633-1
SLES 15 SP7 kernel-default-base 6.4.0-150700.53.16.1.150700.17.11.2 SUSE-SU-2025:03290-1
SLES 15 SP7 kernel-syms-azure 6.4.0-150700.20.15.1 SUSE-SU-2025:03633-1
SLES 15 SP6 kernel-64kb +6 6.4.0-150600.23.70.1 SUSE-SU-2025:03301-1
SLES 15 SP6 kernel-azure +2 6.4.0-150600.8.52.1 SUSE-SU-2025:03634-1
SLES 15 SP6 kernel-coco +3 6.4.0-15061.32.coco15sp6.1 SUSE-SU-2025:03602-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.70.1.150600.12.30.2 SUSE-SU-2025:03301-1
SLES 15 SP5 kernel-64kb +3 5.14.21-150500.55.121.2 SUSE-SU-2025:03344-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.121.2.150500.6.57.2 SUSE-SU-2025:03344-1
SLES 15 SP5 kernel-docs +2 5.14.21-150500.55.121.1 SUSE-SU-2025:03344-1
SLES 15 SP4 kernel-64kb +6 5.14.21-150400.24.176.1 SUSE-SU-2025:03314-1
SLES 15 SP4 kernel-default-base 5.14.21-150400.24.176.1.150400.24.90.1 SUSE-SU-2025:03314-1
Show 19 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 16.0 kernel-64kb +7 6.12.0-160000.6.1 SUSE-SU-2025:21139-1
SLES for SAP 16.0 kernel-default-base 6.12.0-160000.6.1.160000.2.4 SUSE-SU-2025:21139-1
SLES for SAP 15 SP5 kernel-default-base 5.14.21-150500.55.121.2.150500.6.57.2 SUSE-SU-2025:03344-1
SLES for SAP 15 SP5 kernel-docs +2 5.14.21-150500.55.121.1 SUSE-SU-2025:03344-1
SLES for SAP 15 SP5 kernel-source +1 5.14.21-150500.55.121.2 SUSE-SU-2025:03344-1
SLES for SAP 15 SP4 kernel-default-base 5.14.21-150400.24.176.1.150400.24.90.1 SUSE-SU-2025:03314-1
SLES for SAP 15 SP4 kernel-docs +4 5.14.21-150400.24.176.1 SUSE-SU-2025:03314-1
SLES 16.0 kernel-64kb +7 6.12.0-160000.6.1 SUSE-SU-2025:21179-1, SUSE-SU-2025:21139-1
SLES 16.0 kernel-default-base 6.12.0-160000.6.1.160000.2.4 SUSE-SU-2025:21139-1
SLE Micro 6.2 kernel-default-base 6.12.0-160000.6.1.160000.2.4 SUSE-SU-2025:21074-1
SLE Micro 6.2 kernel-rt +5 6.12.0-160000.6.1 SUSE-SU-2026:20560-1, SUSE-SU-2025:21074-1
SLE Micro 6.1 kernel-default-base 6.4.0-34.1.21.11 SUSE-SU-2025:20669-1
SLE Micro 6.1 kernel-rt +1 6.4.0-36.1 SUSE-SU-2025:20756-1
SLE Micro 6.1 kernel-source +2 6.4.0-34.1 SUSE-SU-2025:20669-1
SLE Micro 6.0 kernel-default-base 6.4.0-34.1.21.11 SUSE-SU-2025:20653-1
SLE Micro 6.0 kernel-rt +1 6.4.0-36.1 SUSE-SU-2025:20739-1
SLE Micro 6.0 kernel-source +2 6.4.0-34.1 SUSE-SU-2025:20653-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.121.2.150500.6.57.2 SUSE-SU-2025:03344-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.106.1 SUSE-SU-2025:03283-1
SLE Micro 5.5 kernel-source +1 5.14.21-150500.55.121.2 SUSE-SU-2025:03344-1
SLE Micro 5.4 kernel-default 5.14.21-150400.24.176.1 SUSE-SU-2025:03314-1
SLE Micro 5.4 kernel-default-base 5.14.21-150400.24.176.1.150400.24.90.1 SUSE-SU-2025:03314-1
SLE Micro 5.4 kernel-rt +1 5.14.21-150400.15.130.1 SUSE-SU-2025:03383-1
SLE Micro 5.3 kernel-default 5.14.21-150400.24.176.1 SUSE-SU-2025:03314-1
SLE Micro 5.3 kernel-default-base 5.14.21-150400.24.176.1.150400.24.90.1 SUSE-SU-2025:03314-1
SLE Micro 5.3 kernel-rt +1 5.14.21-150400.15.130.1 SUSE-SU-2025:03383-1
SLE Live Patching 15 SP7 kernel-default 6.4.0-150700.53.16.1 SUSE-SU-2025:03290-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7-RT_Update_4 1-150700.1.3.2 SUSE-SU-2025:03382-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7_Update_4 1-150700.15.3.2 SUSE-SU-2025:03290-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.70.1 SUSE-SU-2025:03301-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_15 1-150600.1.3.1 SUSE-SU-2025:03272-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_15 1-150600.13.3.2 SUSE-SU-2025:03301-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.121.2 SUSE-SU-2025:03344-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_30 1-150500.11.5.1 SUSE-SU-2025:03344-1
SLE HPC 15 SP5 kernel-64kb +2 5.14.21-150500.55.121.2 SUSE-SU-2025:03344-1
SLE HPC 15 SP5 kernel-default-base 5.14.21-150500.55.121.2.150500.6.57.2 SUSE-SU-2025:03344-1
SLE HPC 15 SP5 kernel-docs +2 5.14.21-150500.55.121.1 SUSE-SU-2025:03344-1
SLE HPC 15 SP4 kernel-64kb +5 5.14.21-150400.24.176.1 SUSE-SU-2025:03314-1
SLE HPC 15 SP4 kernel-default-base 5.14.21-150400.24.176.1.150400.24.90.1 SUSE-SU-2025:03314-1
SUSE Real Time Module 15 SP7 kernel-rt +2 6.4.0-150700.7.16.1 SUSE-SU-2025:03382-1
SUSE Real Time Module 15 SP6 kernel-rt +3 6.4.0-150600.10.52.1 SUSE-SU-2025:03272-1
SUSE Manager Server LTS 4.3 kernel-default-base 5.14.21-150400.24.176.1.150400.24.90.1 SUSE-SU-2025:03314-1
SUSE Manager Server LTS 4.3 kernel-syms +3 5.14.21-150400.24.176.1 SUSE-SU-2025:03314-1
SUSE Manager Proxy LTS 4.3 kernel-default-base 5.14.21-150400.24.176.1.150400.24.90.1 SUSE-SU-2025:03314-1
SUSE Manager Proxy LTS 4.3 kernel-syms +2 5.14.21-150400.24.176.1 SUSE-SU-2025:03314-1
ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 kernel-default-base 6.12.0-160000.6.1.160000.2.4 openSUSE-SU-2025:20081-1
openSUSE Leap 16.0 kernel-rt +10 6.12.0-160000.6.1 openSUSE-SU-2025:20081-1
openSUSE Leap 15.6 dtb-aarch64 +10 6.4.0-150600.23.70.1 SUSE-SU-2025:03301-1
openSUSE Leap 15.6 kernel-azure +2 6.4.0-150600.8.52.1 SUSE-SU-2025:03634-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.70.1.150600.12.30.2 SUSE-SU-2025:03301-1
openSUSE Leap 15.6 kernel-rt +3 6.4.0-150600.10.52.1 SUSE-SU-2025:03272-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.12.40-64.114 +1 1:1.0-0.amzn2023 ALAS2023-2025-1170, ALAS2023-2025-1169
Amazon Linux 2023 perf +14 1:6.1.148-173.267.amzn2023 ALAS2023-2025-1169
Amazon Linux 2023 perf6.12 +14 1:6.12.40-64.114.amzn2023 ALAS2023-2025-1170

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 kernel 6.6.104.2-1 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 9 kernel-uek +34 6.12.0-103.40.4.3.el10uek ELSA-2025-20662, ELSA-2025-20608
Oracle Linux 8 bpftool +18 5.15.0-324.217.5.2.el9uek ELSA-2026-500249

Advisories 49

References