CVE-2025-39705

MEDIUM

MEDIUM Priority: 0.01 BB Relevance: 36/100

Published: 2025-09-05 Modified: 2026-10-30 First seen: 2026-10-30 Status: active

Attack Surface

Low Complexity No Interaction

CVSS Vector Breakdown

AV: Local

AC: Low

PR: Low

UI: None

S: Unchanged

C: None

I: None

A: High

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix a Null pointer dereference vulnerability [Why] A null pointer dereference vulnerability exists in the AMD display driver's (DC module) cleanup function dc_destruct(). When display control context (dc->ctx) construction fails (due to memory allocation failure), this pointer remains NULL. During subsequent error handling when dc_destruct() is called, there's no NULL check before dereferencing the perf_trace member (dc->ctx->perf_trace), causing a kernel null pointer dereference crash. [How] Check if dc->ctx is non-NULL before dereferencing. (Updated commit text and removed unnecessary error message) (cherry picked from commit 9dd8e2ba268c636c240a918e0a31e6feaee19404)

Weakness Classification (1)

CWE-476

Affected Software (7)

Vendor	Product	Version
Linux	Linux	4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < dd9699368f37aca4f216857847a46a8a2c289f94
Linux	Linux	4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 0d9f4f202de1522aadc7a827aba0ae92b3d70937
Linux	Linux	4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 0961673cc5f0055957aa46f25eb4ef6c07e00165
Linux	Linux	4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 4ade995b9b25b3c6e8dc42c27070340f1358d8c8
Linux	Linux	4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 1bcf63a44381691d6192872801f830ce3250e367
Linux	Linux	4.15
linux	linux_kernel	4.15 – 6.12.44