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    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Mon, 05 Oct 2026 03:55:59 +0000</lastBuildDate>
    <item>
      <title>CVE-2024-26729 — drm/amd/display: Fix potential null pointer dereference in dc_dmub_srv</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2024-26729</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;drm/amd/display: Fix potential null pointer dereference in dc_dmub_srv&lt;/p&gt;
&lt;p&gt;Fixes potential null pointer dereference warnings in the
dc_dmub_srv_cmd_list_queue_execute() and dc_dmub_srv_is_hw_pwr_up()
functions.&lt;/p&gt;
&lt;p&gt;In both functions, the &amp;#39;dc_dmub_srv&amp;#39; variable was being dereferenced
before it was checked for null. This could lead to a null pointer
dereference if &amp;#39;dc_dmub_srv&amp;#39; is null. The fix is to check if
&amp;#39;dc_dmub_srv&amp;#39; is null before dereferencing it.&lt;/p&gt;
&lt;p&gt;Thus moving the null checks for &amp;#39;dc_dmub_srv&amp;#39; to the beginning of the
functions to ensure that &amp;#39;dc_dmub_srv&amp;#39; is not null when it is
dereferenced.&lt;/p&gt;
&lt;p&gt;Found by smatch &amp;amp; thus fixing the below:
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:133 dc_dmub_srv_cmd_list_queue_execute() warn: variable dereferenced before check &amp;#39;dc_dmub_srv&amp;#39; (see line 128)
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:1167 dc_dmub_srv_is_hw_pwr_up() warn: variable dereferenced before check &amp;#39;dc_dmub_srv&amp;#39; (see line 1164)&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;drm/amd/display: Fix potential null pointer dereference in dc_dmub_srv&lt;/p&gt;
&lt;p&gt;Fixes potential null pointer dereference warnings in the
dc_dmub_srv_cmd_list_queue_execute() and dc_dmub_srv_is_hw_pwr_up()
functions.&lt;/p&gt;
&lt;p&gt;In both functions, the &amp;#39;dc_dmub_srv&amp;#39; variable was being dereferenced
before it was checked for null. This could lead to a null pointer
dereference if &amp;#39;dc_dmub_srv&amp;#39; is null. The fix is to check if
&amp;#39;dc_dmub_srv&amp;#39; is null before dereferencing it.&lt;/p&gt;
&lt;p&gt;Thus moving the null checks for &amp;#39;dc_dmub_srv&amp;#39; to the beginning of the
functions to ensure that &amp;#39;dc_dmub_srv&amp;#39; is not null when it is
dereferenced.&lt;/p&gt;
&lt;p&gt;Found by smatch &amp;amp; thus fixing the below:
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:133 dc_dmub_srv_cmd_list_queue_execute() warn: variable dereferenced before check &amp;#39;dc_dmub_srv&amp;#39; (see line 128)
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:1167 dc_dmub_srv_is_hw_pwr_up() warn: variable dereferenced before check &amp;#39;dc_dmub_srv&amp;#39; (see line 1164)&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2024-26729</guid>
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