# CVE-2024-49876: linux: In the Linux kernel, the following vulnerability has been resolved:  drm/xe: fix UAF around queue destruction  We cur...

CVE-2024-49876 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-49876, released October 21, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-49876
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0024
- 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: 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)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.11.4-1 | [DEBIAN-CVE-2024-49876](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49876.md) | Oct 21, 2024 |
| Linux | linux Debian 14 | 6.11.4-1 | [DEBIAN-CVE-2024-49876](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49876.md) | Oct 21, 2024 |

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