CVE-2026-101304
highWhen 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…
Vendor / product: Freebsd — freebsd
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.
CVSS
7.1
7.1 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-10-15 07:17
Modified: 2026-10-20 17:17
NVD status: Modified
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 ↗