CVE-2026-5398
highThe implementation of TIOCNOTTY failed to clear a back-pointer from the structure representing the controlling terminal to the calling process' session.
Vendor / product: Freebsd — freebsd
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.
CVSS
8.4
8.4 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
Timeline (UTC)
Published: 2026-04-22 03:16
Modified: 2026-11-11 23:10
NVD status: Analyzed
Last synced 3 hours ago
Verified against the source API 2026-11-11 23:12 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
freebsd / freebsd 13.5, 14.3, 14.4, 15.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://security.freebsd.org/advisories/FreeBSD-SA-26:10.tty.asc
References
- https://security.freebsd.org/advisories/FreeBSD-SA-26:10.tty.asc secteam@freebsd.org
Data sources
NVD CVE API 2.0 — fetched 2026-11-11 23:12 UTC · record ↗