CVE-2026-101305
Multiple jail filesystem root escapes
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
renameat(2) did not enforce FD_RESOLVE_BENEATH on its directory arguments. A jailed process could rename a directory relative to a restricted descriptor, then escape the jail root via fchdir(2). This requires the directory to reside on a filesystem that is also reachable from the jail's root. 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.
| CWE | CWE-273 |
| Vendor | freebsd |
| Product | freebsd |
| Published | Oct 15, 2026 |
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Affected Versions
FreeBSD / FreeBSD
15.1-RELEASE < p4 15.0-RELEASE < p14 14.5-RELEASE < p1 14.4-RELEASE < p10
References
Credits
Jan Bramkamp