Riskcovery

CVE-2024-49943

drm/xe/guc_submit: add missing locking in wedged_fini

State
Published
Severity
7.8 High
Published
Oct 21, 2024
Updated
Aug 5, 2026
Reserved
Oct 21, 2024

Read the record on cve.org

Description

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

drm/xe/guc_submit: add missing locking in wedged_fini

Any non-wedged queue can have a zero refcount here and can be running concurrently with an async queue destroy, therefore dereferencing the queue ptr to check wedge status after the lookup can trigger UAF if queue is not wedged. Fix this by keeping the submission_state lock held around the check to postpone the free and make the check safe, before dropping again around the put() to avoid the deadlock.

(cherry picked from commit d28af0b6b9580b9f90c265a7da0315b0ad20bbfd)

Scores

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

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 8ed9aaae39f39130b7a3eb2726be05d7f64b344c to before d88f9bab7e62dd0dbe983fa70cf040042a60cc84Affected
  • 8ed9aaae39f39130b7a3eb2726be05d7f64b344c to before 790533e44bfc7af929842fccd9674c9f424d4627Affected
LinuxLinux
  • 6.11Affected
  • before 6.11Not affected
  • 6.11.3 through 6.11.*Not affected
  • 6.12 and laterNot affected

References

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