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    <lastBuildDate>Mon, 05 Oct 2026 12:11:45 +0000</lastBuildDate>
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      <title>CVE-2023-52646 — aio: fix mremap after fork null-deref</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2023-52646</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;aio: fix mremap after fork null-deref&lt;/p&gt;
&lt;p&gt;Commit e4a0d3e720e7 (&amp;#34;aio: Make it possible to remap aio ring&amp;#34;) introduced
a null-deref if mremap is called on an old aio mapping after fork as
mm-&amp;gt;ioctx_table will be set to NULL.&lt;/p&gt;
&lt;p&gt;[jmoyer@redhat.com: fix 80 column issue]&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;aio: fix mremap after fork null-deref&lt;/p&gt;
&lt;p&gt;Commit e4a0d3e720e7 (&amp;#34;aio: Make it possible to remap aio ring&amp;#34;) introduced
a null-deref if mremap is called on an old aio mapping after fork as
mm-&amp;gt;ioctx_table will be set to NULL.&lt;/p&gt;
&lt;p&gt;[jmoyer@redhat.com: fix 80 column issue]&lt;/p&gt;</content:encoded>
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