CVE-2025-39705

Summary

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)

Impact & exploitability

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

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/0961673cc5f0055957aa46f25eb4ef6c07e00165 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/0961673cc5f0055957aa46f25eb4ef6c07e00165Patch
• https://git.kernel.org/stable/c/1bcf63a44381691d6192872801f830ce3250e367Patch
• https://git.kernel.org/stable/c/4ade995b9b25b3c6e8dc42c27070340f1358d8c8Patch
• https://git.kernel.org/stable/c/0d9f4f202de1522aadc7a827aba0ae92b3d70937
• https://git.kernel.org/stable/c/dd9699368f37aca4f216857847a46a8a2c289f94