by Kastro CVE-2026-101306
FreeBSD FreeBSD — Multiple jail filesystem root escapes
Description · from the CVE record
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.
Affected
ProductAffectedFixed inSource
FreeBSD15.1-RELEASE – < p4p4CNA
FreeBSD15.0-RELEASE – < p14p14CNA
FreeBSD14.5-RELEASE – < p1p1CNA
FreeBSD14.4-RELEASE – < p10p10CNA
Scores by source
CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total