CVE-2025-39705

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drm/amd/display: fix a Null pointer dereference vulnerability<br /> <br /> [Why]<br /> A null pointer dereference vulnerability exists in the AMD display driver&amp;#39;s<br /> (DC module) cleanup function dc_destruct().<br /> When display control context (dc-&gt;ctx) construction fails<br /> (due to memory allocation failure), this pointer remains NULL.<br /> During subsequent error handling when dc_destruct() is called,<br /> there&amp;#39;s no NULL check before dereferencing the perf_trace member<br /> (dc-&gt;ctx-&gt;perf_trace), causing a kernel null pointer dereference crash.<br /> <br /> [How]<br /> Check if dc-&gt;ctx is non-NULL before dereferencing.<br /> <br /> (Updated commit text and removed unnecessary error message)<br /> (cherry picked from commit 9dd8e2ba268c636c240a918e0a31e6feaee19404)