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CVE-2025-38560 The advisory has been revoked - it doesn't affect any version of package kernel-default-livepatch  (opens in a new tab)

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0.18% (8th percentile)

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  • Snyk IDSNYK-SLES154-KERNELDEFAULTLIVEPATCH-13024679
  • published24 Sept 2025
  • disclosed23 Sept 2025
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Introduced: 23 Sep 2025

CVE-2025-38560  (opens in a new tab)

Amendment

The SLES security team deemed this advisory irrelevant for SLES:15.4.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-default-livepatch package and not the kernel-default-livepatch package as distributed by SLES.

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.