CVE-2026-101305
highrenameat(2) did not enforce FD_RESOLVE_BENEATH on its directory arguments.
Vendor / product: Freebsd — freebsd
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.
CVSS
8.8
8.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
Timeline (UTC)
Published: 2026-10-15 07:17
Modified: 2026-10-20 00:20
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:03 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
freebsd / freebsd 14.4, 14.5, 15.0, 15.1
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.asc
Patch / mitigation: https://security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.asc
References
- https://security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.asc secteam@freebsd.org
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:03 UTC · record ↗