# CVE-2024-49943: linux: In the Linux kernel, the following vulnerability has been resolved:  drm/xe/guc_submit: add missing locking in wedged...

CVE-2024-49943 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-49943, released October 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-49943
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 21, 2024

## 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)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.11.4-1 | [DEBIAN-CVE-2024-49943](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49943.md) | Oct 21, 2024 |
| Linux | linux Debian 14 | 6.11.4-1 | [DEBIAN-CVE-2024-49943](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49943.md) | Oct 21, 2024 |

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