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

2026-07-06

AI Q&A

2025-10-01

EPSS Evaluated

2026-07-05

NVD

CVE-2022-50454

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 5.15.160 (inc) to 5.16 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

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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