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Review reviewHigh

CVE-2022-50454

Linux 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.

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.10.01
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

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.

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5 < 56ee9577915dc06f55309901012a9ef68dbdb5a8, >= 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5 < 5d6093c49c098d86c7b136aba9922df44aeb6944, >= 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5 < 861f085f81fd569b02cc2c11165a9e6cca144424, >= 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5 < 3aeda2fe6517cc52663d4ce3588dd43f0d4124a7, >= 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5 < 7d80473e9f12548ac05b36af4fb9ce80f2f73509, >= 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5 < 540dfd188ea2940582841c1c220bd035a7db0e51, >= 5.4, >= 5.4 < 5.4.220, >= 5.5 < 5.10.150, >= 5.11 < 5.15.75, >= 5.16 < 5.19.17, >= 6.0 < 6.0.3
Fixed versions
5.4.220, 5.10.150, 5.15.75, 5.19.17, 6.0.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416