CVE-2026-5398

HIGH EPSS 6.1%
Published Apr 22, 20262mo ago · Modified Jun 17, 20261w ago
8.4 CVSS 3.1
High
Find Similar
Published Apr 22, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.4
Exploitability
2.5
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
6.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 33

VendorProductVersionRange
freebsdfreebsd13.5any
freebsdfreebsd13.5any
freebsdfreebsd13.5any
freebsdfreebsd13.5any
freebsdfreebsd13.5any
freebsdfreebsd13.5any
freebsdfreebsd13.5any
freebsdfreebsd13.5any
freebsdfreebsd13.5any
freebsdfreebsd13.5any
freebsdfreebsd13.5any
freebsdfreebsd13.5any
freebsdfreebsd13.5any
freebsdfreebsd14.3any
freebsdfreebsd14.3any
freebsdfreebsd14.3any
freebsdfreebsd14.3any
freebsdfreebsd14.3any
freebsdfreebsd14.3any
freebsdfreebsd14.3any
freebsdfreebsd14.3any
freebsdfreebsd14.3any
freebsdfreebsd14.3any
freebsdfreebsd14.3any
freebsdfreebsd14.4any
freebsdfreebsd14.4any
freebsdfreebsd14.4any
freebsdfreebsd15.0any
freebsdfreebsd15.0any
freebsdfreebsd15.0any
freebsdfreebsd15.0any
freebsdfreebsd15.0any
freebsdfreebsd15.0any

References 1

  • security.freebsd.org https://security.freebsd.org/advisories/FreeBSD-SA-26:10.tty.asc
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.