CVE-2022-50454
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-01

Last updated on: 2025-10-02

Assigner: kernel.org

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.
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Meta Information
Published
2025-10-01
Last Modified
2025-10-02
Generated
2026-06-16
AI Q&A
2025-10-01
EPSS Evaluated
2026-06-15
NVD
CVE-2022-50454
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a use-after-free bug in the Linux kernel's nouveau driver, specifically in the function nouveau_gem_prime_import_sg_table(). When nouveau_bo_init() fails, it frees memory, but a subsequent call to nouveau_bo_ref() uses this already freed memory, leading to a use-after-free condition. The fix involves removing the call to nouveau_bo_ref() to prevent accessing freed memory.

Impact Analysis

The use-after-free vulnerability can lead to undefined behavior such as system crashes, memory corruption, or potentially allow an attacker to execute arbitrary code or escalate privileges by exploiting the freed memory access in the nouveau driver.

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