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    <lastBuildDate>Wed, 30 Sep 2026 16:24:26 +0000</lastBuildDate>
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      <title>CVE-2026-63855 — drm/amdgpu/vcn: set no_user_fence for VCN v2.5 enc/dec rings</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-63855</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/amdgpu/vcn: set no_user_fence for VCN v2.5 enc/dec rings&lt;/p&gt;
&lt;p&gt;VCN encoder and decoder rings do not support 64-bit user fence writes,
reject CS submissions with user fences.&lt;/p&gt;
&lt;p&gt;(cherry picked from commit efc9dd5590894109bce9a0bfe1fa5592dd6b20b1)&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/amdgpu/vcn: set no_user_fence for VCN v2.5 enc/dec rings&lt;/p&gt;
&lt;p&gt;VCN encoder and decoder rings do not support 64-bit user fence writes,
reject CS submissions with user fences.&lt;/p&gt;
&lt;p&gt;(cherry picked from commit efc9dd5590894109bce9a0bfe1fa5592dd6b20b1)&lt;/p&gt;</content:encoded>
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