CVE-2026-101306
Critical
Description
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Freebsd
PublishedOct 15, 2026
First seenOct 15, 2026
Weakness typeCWE-273CWE-273CWE-281CWE-281
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| freebsd freebsd | 14.4, 14.5, 15.0, 15.1 | — |
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