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Vulnerability record · CVE-2022-50454 · published 1 October 2025

CVE-2022-50454: Linux kernel use after free vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix a use-after-free in nouveau_gem_prime_import_sg_table() nouveau_bo_init() is backed by ttm_bo_init() and ferries its return code back to the caller. On failures, ttm will call nouveau_bo_del_ttm() and free the memory.Thus, when nouveau_bo_init() returns an error, the gem object has already been released. Then the call to nouveau_bo_ref() will use the freed "nvbo->bo" and lead to a use-after-free bug. We should delete the call to nouveau_bo_ref() to avoid the use-after-free.

7.8 CVSS 3.1 High EPSS 0.16% · top 95.6% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
4 Aug 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix a use-after-free in nouveau_gem_prime_import_sg_table() nouveau_bo_init() is backed by ttm_bo_init() and ferries its return code back to the caller. On failures, ttm will call nouveau_bo_del_ttm() and free the memory.Thus, when nouveau_bo_init() returns an error, the gem object has already been released. Then the call to nouveau_bo_ref() will use the freed "nvbo->bo" and lead to a use-after-free bug. We should delete the call to nouveau_bo_ref() to avoid the use-after-free.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/3aeda2fe6517cc52663d4ce3588dd43f0d4124a7 Patch
https://git.kernel.org/stable/c/540dfd188ea2940582841c1c220bd035a7db0e51 Patch
https://git.kernel.org/stable/c/56ee9577915dc06f55309901012a9ef68dbdb5a8 Patch
https://git.kernel.org/stable/c/5d6093c49c098d86c7b136aba9922df44aeb6944 Patch
https://git.kernel.org/stable/c/7d80473e9f12548ac05b36af4fb9ce80f2f73509 Patch
https://git.kernel.org/stable/c/861f085f81fd569b02cc2c11165a9e6cca144424 Patch

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Source: NIST National Vulnerability Database (record CVE-2022-50454), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.