CVE-2024-44956

MEDIUM EPSS 3.9%
Published Sep 4, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 4, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: drm/xe/preempt_fence: enlarge the fence critical section It is really easy to introduce subtle deadlocks in preempt_fence_work_func() since we operate on single global ordered-wq for signalling our preempt fences behind the scenes, so even though we signal a particular fence, everything in the callback should be in the fence critical section, since blocking in the callback will prevent other published fences from signalling. If we enlarge the fence critical section to cover the entire callback, then lockdep should be able to understand this better, and complain if we grab a sensitive lock like vm->lock, which is also held when waiting on preempt fences.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-667

Affected Products 1

VendorProductVersionRange
linuxlinux_kernel* <6.10.5

References 2

  • git.kernel.org https://git.kernel.org/stable/c/3cd1585e57908b6efcd967465ef7685f40b2a294
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/458bb83119dfee5d14c677f7846dd9363817006f
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/3cd1585e57908b6efcd967465ef7685f40b2a294
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/458bb83119dfee5d14c677f7846dd9363817006f
    Patch