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    <lastBuildDate>Wed, 07 Oct 2026 12:44:00 +0000</lastBuildDate>
    <item>
      <title>CVE-2021-47046 — drm/amd/display: Fix off by one in hdmi_14_process_transaction()</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2021-47046</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 off by one in hdmi_14_process_transaction()&lt;/p&gt;
&lt;p&gt;The hdcp_i2c_offsets[] array did not have an entry for
HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE so it led to an off by one
read overflow.  I added an entry and copied the 0x0 value for the offset
from similar code in drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c.&lt;/p&gt;
&lt;p&gt;I also declared several of these arrays as having HDCP_MESSAGE_ID_MAX
entries.  This doesn&amp;#39;t change the code, but it&amp;#39;s just a belt and
suspenders approach to try future proof the code.&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 off by one in hdmi_14_process_transaction()&lt;/p&gt;
&lt;p&gt;The hdcp_i2c_offsets[] array did not have an entry for
HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE so it led to an off by one
read overflow.  I added an entry and copied the 0x0 value for the offset
from similar code in drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c.&lt;/p&gt;
&lt;p&gt;I also declared several of these arrays as having HDCP_MESSAGE_ID_MAX
entries.  This doesn&amp;#39;t change the code, but it&amp;#39;s just a belt and
suspenders approach to try future proof the code.&lt;/p&gt;</content:encoded>
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