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)

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 0961673cc5f0055957aa46f25eb4ef6c07e00165affected
LinuxLinux4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 4ade995b9b25b3c6e8dc42c27070340f1358d8c8affected
LinuxLinux4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 1bcf63a44381691d6192872801f830ce3250e367affected
LinuxLinux4.15affected
LinuxLinux0 < 4.15unaffected
LinuxLinux6.12.44 <= 6.12.*unaffected
LinuxLinux6.16.4 <= 6.16.*unaffected
LinuxLinux6.17 <= *unaffected

Weaknesses

References