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    <lastBuildDate>Fri, 16 Oct 2026 21:40:32 +0000</lastBuildDate>
    <item>
      <title>CVE-2022-49895 — cxl/region: Fix decoder allocation crash</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2022-49895</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;cxl/region: Fix decoder allocation crash&lt;/p&gt;
&lt;p&gt;When an intermediate port&amp;#39;s decoders have been exhausted by existing
regions, and creating a new region with the port in question in it&amp;#39;s
hierarchical path is attempted, cxl_port_attach_region() fails to find a
port decoder (as would be expected), and drops into the failure / cleanup
path.&lt;/p&gt;
&lt;p&gt;However, during cleanup of the region reference, a sanity check attempts
to dereference the decoder, which in the above case didn&amp;#39;t exist. This
causes a NULL pointer dereference BUG.&lt;/p&gt;
&lt;p&gt;To fix this, refactor the decoder allocation and de-allocation into
helper routines, and in this &amp;#39;free&amp;#39; routine, check that the decoder,
@cxld, is valid before attempting any operations on it.&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;cxl/region: Fix decoder allocation crash&lt;/p&gt;
&lt;p&gt;When an intermediate port&amp;#39;s decoders have been exhausted by existing
regions, and creating a new region with the port in question in it&amp;#39;s
hierarchical path is attempted, cxl_port_attach_region() fails to find a
port decoder (as would be expected), and drops into the failure / cleanup
path.&lt;/p&gt;
&lt;p&gt;However, during cleanup of the region reference, a sanity check attempts
to dereference the decoder, which in the above case didn&amp;#39;t exist. This
causes a NULL pointer dereference BUG.&lt;/p&gt;
&lt;p&gt;To fix this, refactor the decoder allocation and de-allocation into
helper routines, and in this &amp;#39;free&amp;#39; routine, check that the decoder,
@cxld, is valid before attempting any operations on it.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2022-49895</guid>
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