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      <title>CVE-2026-101304 — Multiple jail filesystem root escapes</title>
      <link>https://db.gcve.eu/vuln/cve-2026-101304</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; FreeBSD&lt;/p&gt;
&lt;p&gt;When fdescfs(4) was mounted in a jail with the &amp;#34;nodup&amp;#34; option, opening /dev/fd/N returned a descriptor that did not inherit FD_RESOLVE_BENEATH or the Capsicum capability rights of descriptor N.&lt;/p&gt;
&lt;p&gt;A process in a jail that has received a directory file descriptor from another jail can use these techniques to escape the jail&amp;#39;s filesystem root restriction.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; FreeBSD&lt;/p&gt;
&lt;p&gt;When fdescfs(4) was mounted in a jail with the &amp;#34;nodup&amp;#34; option, opening /dev/fd/N returned a descriptor that did not inherit FD_RESOLVE_BENEATH or the Capsicum capability rights of descriptor N.&lt;/p&gt;
&lt;p&gt;A process in a jail that has received a directory file descriptor from another jail can use these techniques to escape the jail&amp;#39;s filesystem root restriction.&lt;/p&gt;</content:encoded>
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