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.
Metrics
Affected Vendors & Products
References
History
Tue, 20 Oct 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Tue, 20 Oct 2026 00:30:00 +0000
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| CPEs | cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p4:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p5:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p6:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p7:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p8:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p9:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.5:-:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p10:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p11:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p12:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p13:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p7:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p8:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p9:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.1:-:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.1:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.1:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.1:p3:*:*:*:*:*:* |
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| Metrics |
cvssV3_1
|
Fri, 16 Oct 2026 22:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Freebsd
Freebsd freebsd |
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| Vendors & Products |
Freebsd
Freebsd freebsd |
Thu, 15 Oct 2026 07:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Multiple jail filesystem root escapes | |
| Weaknesses | CWE-273 | |
| References |
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Status: PUBLISHED
Assigner: freebsd
Published: 2026-10-15T06:46:03.792Z
Updated: 2026-10-20T16:53:31.151Z
Reserved: 2026-09-28T13:33:02.323Z
Link: CVE-2026-101304
Updated: 2026-10-20T16:50:40.306Z
Status : Modified
Published: 2026-10-15T07:17:57.550
Modified: 2026-10-20T17:17:27.510
Link: CVE-2026-101304
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