Riskcovery

CVE-2024-49876

drm/xe: fix UAF around queue destruction

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: fix UAF around queue destruction

We currently do stuff like queuing the final destruction step on a random system wq, which will outlive the driver instance. With bad timing we can teardown the driver with one or more work workqueue still being alive leading to various UAF splats. Add a fini step to ensure user queues are properly torn down. At this point GuC should already be nuked so queue itself should no longer be referenced from hw pov.

v2 (Matt B) - Looks much safer to use a waitqueue and then just wait for the xa_array to become empty before triggering the drain.

(cherry picked from commit 861108666cc0e999cffeab6aff17b662e68774e3)

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
  • dd08ebf6c3525a7ea2186e636df064ea47281987 to before 272b0e78874586d6ccae04079d75b27b47705544Affected
  • dd08ebf6c3525a7ea2186e636df064ea47281987 to before 421c74670b0f9d5c007f1276d3647aa58f407fdeAffected
  • dd08ebf6c3525a7ea2186e636df064ea47281987 to before 2d2be279f1ca9e7288282d4214f16eea8a727cdbAffected
LinuxLinux
  • 6.8Affected
  • before 6.8Not affected
  • 6.10.14 through 6.10.*Not affected
  • 6.11.3 through 6.11.*Not affected
  • 6.12 and laterNot affected

References

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