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      <title>CVE-2024-40938 — landlock: Fix d_parent walk</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2024-40938</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;landlock: Fix d_parent walk&lt;/p&gt;
&lt;p&gt;The WARN_ON_ONCE() in collect_domain_accesses() can be triggered when
trying to link a root mount point.  This cannot work in practice because
this directory is mounted, but the VFS check is done after the call to
security_path_link().&lt;/p&gt;
&lt;p&gt;Do not use source directory&amp;#39;s d_parent when the source directory is the
mount point.&lt;/p&gt;
&lt;p&gt;[mic: Fix commit message]&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;landlock: Fix d_parent walk&lt;/p&gt;
&lt;p&gt;The WARN_ON_ONCE() in collect_domain_accesses() can be triggered when
trying to link a root mount point.  This cannot work in practice because
this directory is mounted, but the VFS check is done after the call to
security_path_link().&lt;/p&gt;
&lt;p&gt;Do not use source directory&amp;#39;s d_parent when the source directory is the
mount point.&lt;/p&gt;
&lt;p&gt;[mic: Fix commit message]&lt;/p&gt;</content:encoded>
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