Riskcovery

CVE-2023-54043

iommufd: Do not add the same hwpt to the ioas->hwpt_list twice

State
Published
Severity
8.8 High
Published
Dec 24, 2025
Updated
Oct 15, 2026
Reserved
Dec 24, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

iommufd: Do not add the same hwpt to the ioas->hwpt_list twice

The hwpt is added to the hwpt_list only during its creation, it is never added again. This hunk is some missed leftover from rework. Adding it twice will corrupt the linked list in some cases.

It effects HWPT specific attachment, which is something the test suite cannot cover until we can create a legitimate struct device with a non-system iommu "driver" (ie we need the bus removed from the iommu code)

Scores

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • e8d57210035b6377d424ba964961892d01127cf6 to before c44adefdcf472f946f0632f4e0ddcbf3e00b8516Affected
  • e8d57210035b6377d424ba964961892d01127cf6 to before b4ff830eca097df51af10a9be29e8cc817327919Affected
LinuxLinux
  • 6.2Affected
  • before 6.2Not affected
  • 6.2.3 through 6.2.*Not affected
  • 6.3 and laterNot affected

References

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