CVE-2024-44956
" Linux DRM Deadlock Vulnerability"
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.
INFO
Published Date :
Sept. 4, 2024, 7:15 p.m.
Last Modified :
Sept. 6, 2024, 4:37 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-44956.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/3cd1585e57908b6efcd967465ef7685f40b2a294 | Patch |
| https://git.kernel.org/stable/c/458bb83119dfee5d14c677f7846dd9363817006f | Patch |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-44956 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-44956 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Sep. 06, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/3cd1585e57908b6efcd967465ef7685f40b2a294 No Types Assigned https://git.kernel.org/stable/c/3cd1585e57908b6efcd967465ef7685f40b2a294 Patch Changed Reference Type https://git.kernel.org/stable/c/458bb83119dfee5d14c677f7846dd9363817006f No Types Assigned https://git.kernel.org/stable/c/458bb83119dfee5d14c677f7846dd9363817006f Patch Added CWE NIST CWE-667 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 6.10.5 -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 04, 2024
Action Type Old Value New Value Added 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. Added Reference kernel.org https://git.kernel.org/stable/c/458bb83119dfee5d14c677f7846dd9363817006f [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/3cd1585e57908b6efcd967465ef7685f40b2a294 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-44956 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-44956
weaknesses.