x86/sev: Evict cache lines during SNP memory validation
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.
CVE-2025-38560
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-38560
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4f9c403e44e5e88feb27d5e617d1adc9cc7ef684",
"lessThan": "1fec416c03d0a64cc21aa04ce4aa14254b017e6a",
"versionType": "git"
},
{
"status": "affected",
"version": "4f9c403e44e5e88feb27d5e617d1adc9cc7ef684",
"lessThan": "1fb873971e23c35c53823c62809a474a92bc3022",
"versionType": "git"
},
{
"status": "affected",
"version": "4f9c403e44e5e88feb27d5e617d1adc9cc7ef684",
"lessThan": "aed15fc08f15dbb15822b2a0b653f67e76aa0fdf",
"versionType": "git"
},
{
"status": "affected",
"version": "4f9c403e44e5e88feb27d5e617d1adc9cc7ef684",
"lessThan": "a762a4c8d9e768b538b3cc60615361a8cf377de8",
"versionType": "git"
},
{
"status": "affected",
"version": "4f9c403e44e5e88feb27d5e617d1adc9cc7ef684",
"lessThan": "f92af52e6dbd8d066d77beba451e0230482dc45b",
"versionType": "git"
},
{
"status": "affected",
"version": "4f9c403e44e5e88feb27d5e617d1adc9cc7ef684",
"lessThan": "7b306dfa326f70114312b320d083b21fa9481e1e",
"versionType": "git"
}
],
"programFiles": [
"arch/x86/boot/cpuflags.c",
"arch/x86/boot/startup/sev-shared.c",
"arch/x86/coco/sev/core.c",
"arch/x86/include/asm/cpufeatures.h",
"arch/x86/include/asm/sev.h",
"arch/x86/kernel/cpu/scattered.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.148",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.102",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.42",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.10",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16.1",
"versionType": "semver",
"lessThanOrEqual": "6.16.*"
},
{
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/x86/boot/cpuflags.c",
"arch/x86/boot/startup/sev-shared.c",
"arch/x86/coco/sev/core.c",
"arch/x86/include/asm/cpufeatures.h",
"arch/x86/include/asm/sev.h",
"arch/x86/kernel/cpu/scattered.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38560
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #30592 · Revision 1
- Added to Heist Feed
- Publisher date