Vulnerability DatabaseCVE-2026-5398
Mend.io Vulnerability Database
The largest open source vulnerability database
What is a Vulnerability ID?
New vulnerability? Tell us about it!
CVE-2026-5398
Published:April 22, 2026
Updated:May 18, 2026
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.
Affected Packages
https://github.com/freebsd/freebsd-src.git (GITHUB):
Affected version(s) >=release/14.3.0 <release/14.3.0-p11
Fix Suggestion:
Update to version release/14.3.0-p11
https://github.com/freebsd/freebsd-src.git (GITHUB):
Affected version(s) >=release/13.0.0 <release/13.5.0-p12
Fix Suggestion:
Update to version release/13.5.0-p12
https://github.com/freebsd/freebsd-src.git (GITHUB):
Affected version(s) >=release/15.0.0 <release/15.0.0-p6
Fix Suggestion:
Update to version release/15.0.0-p6
https://github.com/freebsd/freebsd-src.git (GITHUB):
Affected version(s) >=release/14.4.0 <release/14.4.0-p2
Fix Suggestion:
Update to version release/14.4.0-p2
Related Resources (1)
https://security.freebsd.org/advisories/FreeBSD-SA-26:10.tty.asc
Do you need more information?
Contact Us
CVSS v4
Base Score:
8.6
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.4
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Use After Free
CWE-416
EPSS
Base Score:
0.02