CVE-2025-40058

Description

In the Linux kernel, the following vulnerability has been resolved:iommu/vt-d: Disallow dirty tracking if incoherent page walkDirty page tracking relies on the IOMMU atomically updating the dirty bitin the paging-structure entry. For this operation to succeed, the paging-structure memory must be coherent between the IOMMU and the CPU. Inanother word, if the iommu page walk is incoherent, dirty page trackingdoesnt 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 pagetracking when it is operating in an incoherent mode, mark SSADS assupported only when both ecap_slads and ecap_smpwc are supported.

Risk Information

Base Score

5.3

MODERATE

Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H

EPSS Score

Exploitation Probability

0.032

Associated Vulnerability

No records found

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234