ZDI-26-838: FreeBSD Kernel TTY Race Condition Local Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of FreeBSD Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-58093.
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
Affected FreeBSD Kernel installations are exposed when an attacker can already execute low-privileged code locally on the system. It is a local privilege-escalation issue, not one described as remotely exploitable in the available information.
What level of access does an attacker need before exploiting it?
The attacker must first obtain the ability to execute low-privileged code on the target system. Successful exploitation can then allow privilege escalation.
What identifier should be used to track this issue?
The assigned CVE identifier is CVE-2026-58093. The advisory identifier is ZDI-26-838.