CVE-2025-38560
A critical vulnerability in the Linux kernel’s SNP memory validation can allow attackers to manipulate cache lines, potentially compromising data confidentiality, integrity, and availability. The issue has been fixed in kernel 6.17 and later. Users should update their kernel to mitigate the risk.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Linux kernel 6.17 and newer, including Debian Linux 11.0.
Real-world impact
An attacker could read or modify data in memory, leading to data corruption or unauthorized access.
Why this severity
The CVSS score of 9.3 reflects local access, low attack complexity, no privileges, no user interaction, a change in scope, and high impact on confidentiality, integrity, and availability.
What to do about it
- 01Upgrade the Linux kernel to version 6.17 or later.
NVD-referenced vendor advisory
Timeline
- Aug 19, 2025 · Aug 19, 2025PublishedDisclosed and added to the National Vulnerability Database.
- Jul 30, 2026 · 7d agoAdvisory updatedThe NVD record was last revised.
- Jul 30, 2026 · 6d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.
How it’s attacked
References & advisories
- git.kernel.org/stable/c/1fb873971e23c35c53…patch
- git.kernel.org/stable/c/1fec416c03d0a64cc2…patch
- git.kernel.org/stable/c/7b306dfa326f701143…patch
- git.kernel.org/stable/c/a762a4c8d9e768b538…patch
- git.kernel.org/stable/c/aed15fc08f15dbb158…patch
- git.kernel.org/stable/c/f92af52e6dbd8d066d…patch
- lists.debian.org/debian-lts-announce/2025/10…third party advisory