CVE-2026-5398

HIGH

8.4

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.

CVE Details

CVSS v3.1 Score8.4

SeverityHIGH

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/22/2026

Last Modified4/22/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-416

References

https://security.freebsd.org/advisories/FreeBSD-SA-26:10.tty.asc(secteam@freebsd.org)

IOC Correlations

No correlations recorded

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