CVE-2025-38560 (GCVE-0-2025-38560)

Vulnerability from cvelistv5 – Published: 2025-08-19 17:02 – Updated: 2026-08-05 12:02
VLAI
Title
x86/sev: Evict cache lines during SNP memory validation
Summary
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.
Severity
9.3 (Critical)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 , < 1fec416c03d0a64cc21aa04ce4aa14254b017e6a (git)
Affected: 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 , < 1fb873971e23c35c53823c62809a474a92bc3022 (git)
Affected: 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 , < aed15fc08f15dbb15822b2a0b653f67e76aa0fdf (git)
Affected: 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 , < a762a4c8d9e768b538b3cc60615361a8cf377de8 (git)
Affected: 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 , < f92af52e6dbd8d066d77beba451e0230482dc45b (git)
Affected: 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 , < 7b306dfa326f70114312b320d083b21fa9481e1e (git)
Create a notification for this product.
Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.148 , ≤ 6.1.* (semver)
Unaffected: 6.6.102 , ≤ 6.6.* (semver)
Unaffected: 6.12.42 , ≤ 6.12.* (semver)
Unaffected: 6.15.10 , ≤ 6.15.* (semver)
Unaffected: 6.16.1 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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There is no need to perform the mitigation\\nwhen performing a page state change to shared and rescinding validation.\\n\\nCPUID bit Fn8000001F_EBX[31] defines the COHERENCY_SFW_NO CPUID bit\\nthat, when set, indicates that the software mitigation for this\\nvulnerability is not needed.\\n\\nImplement the mitigation and invoke it when validating memory (making it\\nprivate) and the COHERENCY_SFW_NO bit is not set, indicating the SNP\\nguest is vulnerable.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: x86/sev: Expulsar l\u00edneas de cach\u00e9 durante la validaci\u00f3n de memoria SNP Una vulnerabilidad de coherencia de cach\u00e9 SNP requiere una mitigaci\u00f3n de expulsi\u00f3n de l\u00ednea de cach\u00e9 al validar la memoria despu\u00e9s de un cambio de estado de p\u00e1gina a privado. La mitigaci\u00f3n espec\u00edfica es tocar el primer y el \u00faltimo byte de cada p\u00e1gina de 4K que se est\u00e1 validando. 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Implemente la mitigaci\u00f3n e inv\u00f3quela al validar la memoria (haci\u00e9ndola privada) y el bit COHERENCY_SFW_NO no est\u00e1 establecido, lo que indica que el invitado SNP es vulnerable.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"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\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"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\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"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\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.19\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.19\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.148\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.102\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.42\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15.10\",\"lessThanOrEqual\":\"6.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.16.1\",\"lessThanOrEqual\":\"6.16.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H\",\"baseScore\":9.3,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.5,\"impactScore\":6.0},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.19\",\"versionEndExcluding\":\"6.1.148\",\"matchCriteriaId\":\"1853C7E7-8603-4206-B741-78AC57BA1D20\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.102\",\"matchCriteriaId\":\"DD6EDB96-08AC-49D8-A1A9-4D2140C49BC7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.42\",\"matchCriteriaId\":\"EA7AA5E6-4376-4A85-A021-6ACC5FF801C3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.15.10\",\"matchCriteriaId\":\"5890C690-B295-40C2-9121-FF5F987E5142\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.16\",\"versionEndExcluding\":\"6.16.1\",\"matchCriteriaId\":\"58182352-D7DF-4CC9-841E-03C1D852C3F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Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T09:03:52+00:00",
      "cve": "CVE-2025-38560",
      "id": "CVE-2025-38560",
      "initial_release_date": "2025-08-19T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: x86/sev: Evict cache lines during SNP memory validation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38560.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-25T00:44:27Z",
      "cve": "CVE-2025-38560",
      "id": "CVE-2025-38560",
      "initial_release_date": "2025-08-19T23:23:56Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "426",
      "product_status:known_not_affected": "156",
      "product_status:recommended": "714",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38560",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38560.json",
      "version": "57"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.