Answer in brief
CVE-2025-38560 records a Unknown severity vulnerability in x86/sev: Evict cache lines during SNP memory validation. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2025-38560 records a Unknown severity vulnerability in x86/sev: Evict cache lines during SNP memory validation. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 <1fec416c03d0a64cc21aa04ce4aa14254b017e6a || >=4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 <1fb873971e23c35c53823c62809a474a92bc3022 || >=4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 <aed15fc08f15dbb15822b2a0b653f67e76aa0fdf || >=4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 <a762a4c8d9e768b538b3cc60615361a8cf377de8 || >=4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 <f92af52e6dbd8d066d77beba451e0230482dc45b || >=4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 <7b306dfa326f70114312b320d083b21fa9481e1e | 1fec416c03d0a64cc21aa04ce4aa14254b017e6a, 1fb873971e23c35c53823c62809a474a92bc3022, aed15fc08f15dbb15822b2a0b653f67e76aa0fdf, a762a4c8d9e768b538b3cc60615361a8cf377de8, f92af52e6dbd8d066d77beba451e0230482dc45b, 7b306dfa326f70114312b320d083b21fa9481e1e |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Aug 19, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 <1fec416c03d0a64cc21aa04ce4aa14254b017e6a || >=4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 <1fb873971e23c35c53823c62809a474a92bc3022 || >=4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 <aed15fc08f15dbb15822b2a0b653f67e76aa0fdf || >=4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 <a762a4c8d9e768b538b3cc60615361a8cf377de8 || >=4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 <f92af52e6dbd8d066d77beba451e0230482dc45b || >=4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 <7b306dfa326f70114312b320d083b21fa9481e1e | 1fec416c03d0a64cc21aa04ce4aa14254b017e6a, 1fb873971e23c35c53823c62809a474a92bc3022, aed15fc08f15dbb15822b2a0b653f67e76aa0fdf, a762a4c8d9e768b538b3cc60615361a8cf377de8, f92af52e6dbd8d066d77beba451e0230482dc45b, 7b306dfa326f70114312b320d083b21fa9481e1e |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Aug 19, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.