CVE-2025-38560x86/sev: Evict cache lines during SNP memory validation
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.3 CRITICAL (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 builds before 1fec416c03d0a64cc21aa04ce4aa14254b017e6a; 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 builds before 1fb873971e23c35c53823c62809a474a92bc3022; from 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 before aed15fc08f15dbb15822b2a0b653f67e76aa0fdf; from 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 before a762a4c8d9e768b538b3cc60615361a8cf377de8; from 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 before f92af52e6dbd8d066d77beba451e0230482dc45b; from 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 before 7b306dfa326f70114312b320d083b21fa9481e1e | CNA record |
linux linux_kernel linux:linux_kernel | from 5.19 before 6.1.148; from 6.2 before 6.6.102; from 6.7 before 6.12.42; from 6.13 before 6.15.10; from 6.16 before 6.16.1; 6.17 | NVD |
debian debian_linux debian:debian_linux | 11.0 | NVD |
References
- https://git.kernel.org/stable/c/1fec416c03d0a64cc21aa04ce4aa14254b017e6apatch
- https://git.kernel.org/stable/c/1fb873971e23c35c53823c62809a474a92bc3022patch
- https://git.kernel.org/stable/c/aed15fc08f15dbb15822b2a0b653f67e76aa0fdfpatch
- https://git.kernel.org/stable/c/a762a4c8d9e768b538b3cc60615361a8cf377de8patch
- https://git.kernel.org/stable/c/f92af52e6dbd8d066d77beba451e0230482dc45bpatch
- https://git.kernel.org/stable/c/7b306dfa326f70114312b320d083b21fa9481e1epatch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.