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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)

PUBLISHED Reserved 2024-10-21 | Published 2024-10-21 | Updated 2025-05-04 | Assigner Linux

Product status

Default status
unaffected

8ed9aaae39f39130b7a3eb2726be05d7f64b344c (git) before d88f9bab7e62dd0dbe983fa70cf040042a60cc84
affected

8ed9aaae39f39130b7a3eb2726be05d7f64b344c (git) before 790533e44bfc7af929842fccd9674c9f424d4627
affected

Default status
affected

6.11
affected

Any version before 6.11
unaffected

6.11.3 (semver)
unaffected

6.12 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/d88f9bab7e62dd0dbe983fa70cf040042a60cc84

git.kernel.org/...c/790533e44bfc7af929842fccd9674c9f424d4627

cve.org (CVE-2024-49943)

nvd.nist.gov (CVE-2024-49943)

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