Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c before 0d9f4f202de1522aadc7a827aba0ae92b3d70937; affected 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c before 0961673cc5f0055957aa46f25eb4ef6c07e00165; affected 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c before 4ade995b9b25b3c6e8dc42c27070340f1358d8c8; affected 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c before 1bcf63a44381691d6192872801f830ce3250e367 |
| Linux / Linux | affected 4.15; unaffected 0 before 4.15; unaffected 6.6.160 through 6.6.*; unaffected 6.12.44 through 6.12.*; unaffected 6.16.4 through 6.16.*; unaffected 6.17 through * |
CWE
No CWE identifiers supplied.