CVE-2026-5398

EUVD-2026-24589
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.4 HIGH
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 1%
Affected Products (NVD)
VendorProductVersion
freebsdfreebsd
13.5
freebsdfreebsd
13.5:beta3
freebsdfreebsd
13.5:p1
freebsdfreebsd
13.5:p10
freebsdfreebsd
13.5:p11
freebsdfreebsd
13.5:p2
freebsdfreebsd
13.5:p3
freebsdfreebsd
13.5:p4
freebsdfreebsd
13.5:p5
freebsdfreebsd
13.5:p6
freebsdfreebsd
13.5:p7
freebsdfreebsd
13.5:p8
freebsdfreebsd
13.5:p9
freebsdfreebsd
14.3
freebsdfreebsd
14.3:p1
freebsdfreebsd
14.3:p10
freebsdfreebsd
14.3:p2
freebsdfreebsd
14.3:p3
freebsdfreebsd
14.3:p4
freebsdfreebsd
14.3:p5
freebsdfreebsd
14.3:p6
freebsdfreebsd
14.3:p7
freebsdfreebsd
14.3:p8
freebsdfreebsd
14.3:p9
freebsdfreebsd
14.4
freebsdfreebsd
14.4:p1
freebsdfreebsd
14.4:rc1
freebsdfreebsd
15.0
freebsdfreebsd
15.0:p1
freebsdfreebsd
15.0:p2
freebsdfreebsd
15.0:p3
freebsdfreebsd
15.0:p4
freebsdfreebsd
15.0:p5
𝑥
= Vulnerable software versions