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      <title>CVE-2026-80551 — s390/vfio_ccw: Ensure first IDAW remains constant</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-80551</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;s390/vfio_ccw: Ensure first IDAW remains constant&lt;/p&gt;
&lt;p&gt;The first IDAW in a list does not need to be on a 2K/4K boundary
like all others, and so is read separately to accurately calculate
the size of the buffer needed to read the full IDAL.&lt;/p&gt;
&lt;p&gt;Verify that the address found in the first IDAW is unchanged between
reads, to ensure a consistent set of IDAWs being worked with.&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;s390/vfio_ccw: Ensure first IDAW remains constant&lt;/p&gt;
&lt;p&gt;The first IDAW in a list does not need to be on a 2K/4K boundary
like all others, and so is read separately to accurately calculate
the size of the buffer needed to read the full IDAL.&lt;/p&gt;
&lt;p&gt;Verify that the address found in the first IDAW is unchanged between
reads, to ensure a consistent set of IDAWs being worked with.&lt;/p&gt;</content:encoded>
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