Vulnerability Details CVE-2026-101306
SCM_RIGHTS file descriptor passing did not preserve FD_RESOLVE_BENEATH when a descriptor was transferred. A process could clear the restriction by sending the descriptor to itself over a Unix domain socket.
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 17.8%
CVSS Severity
CVSS v3 Score 9.8