CVSS 7.1 (high) ยท published 2026-10-15
When fdescfs(4) was mounted in a jail with the "nodup" option, opening /dev/fd/N returned a descriptor that did not inherit FD_RESOLVE_BENEATH or the Capsicum capability rights of descriptor N. A process in a jail that has received a directory file descriptor from another jail can use these techniques to escape the jail's filesystem root restriction.
Affected products (NVD): freebsd freebsd
Weakness: CWE-273
Source: NVD CVE-2026-101304
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