Description
The implementation of TIOCNOTTY failed to clear a back-pointer from the structure representing the controlling terminal to the calling process' session. If the invoking process then exits, the terminal structure may end up containing a pointer to freed memory. A malicious process can abuse the dangling pointer to grant itself root privileges.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
https://security.freebsd.org/advisories/FreeBSD-SA-26:10.tty.asc
Scores
CVSS v3
8.4
EPSS
0.0016
EPSS Percentile
6.0%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-416
Status
published
Products (8)
freebsd/freebsd
13.5 (13 CPE variants)
freebsd/freebsd
14.3 (11 CPE variants)
freebsd/freebsd
14.4 (3 CPE variants)
freebsd/freebsd
15.0 (6 CPE variants)
FreeBSD/FreeBSD
13.5-RELEASE - p12
FreeBSD/FreeBSD
14.3-RELEASE - p11
FreeBSD/FreeBSD
14.4-RELEASE - p2
FreeBSD/FreeBSD
15.0-RELEASE - p6
Published
Apr 22, 2026
Tracked Since
Apr 22, 2026