CVE-2025-40058
- Source
- https://cve.org/CVERecord?id=CVE-2025-40058
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-40058.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-40058
- Downstream
- Related
- Published
- 2025-10-28T11:48:31Z
- Modified
- 2026-08-12T03:30:49Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- iommu/vt-d: Disallow dirty tracking if incoherent page walk
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
iommu/vt-d: Disallow dirty tracking if incoherent page walk
Dirty page tracking relies on the IOMMU atomically updating the dirty bit in the paging-structure entry. For this operation to succeed, the paging- structure memory must be coherent between the IOMMU and the CPU. In another word, if the iommu page walk is incoherent, dirty page tracking doesn't work.
The Intel VT-d specification, Section 3.10 "Snoop Behavior" states:
"Remapping hardware encountering the need to atomically update A/EA/D bits in a paging-structure entry that is not snooped will result in a non- recoverable fault."
To prevent an IOMMU from being incorrectly configured for dirty page tracking when it is operating in an incoherent mode, mark SSADS as supported only when both ecap_slads and ecap_smpwc are supported.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40058.json" }- References
-
- https://git.kernel.org/stable/c/57f55048e564dedd8a4546d018e29d6bbfff0a7e
- https://git.kernel.org/stable/c/8d096ce0e87bdc361f0b25d7943543bc53aa0b9e
- https://git.kernel.org/stable/c/ebe16d245a00626bb87163862a1b07daf5475a3e
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40058.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-40058
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git