ZDI-26-785: FreeBSD Kernel Shared Memory Time-Of-Check Time-Of-Use 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-2026-58094.
Affected Software
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
Systems running the affected FreeBSD Kernel are exposed if an attacker can already execute low-privileged code locally on the system. This is a local privilege escalation issue, so remote network access alone is not described as sufficient.
What does an attacker need to exploit it?
The attacker must first obtain the ability to execute low-privileged code on the target FreeBSD system. The provided information does not identify any additional prerequisites or required configuration.
How severe is the issue?
ZDI assigned the vulnerability a CVSS score of 7.8. Successful exploitation allows a local low-privileged attacker to escalate privileges.
How can I identify this issue in tracking and vulnerability-management systems?
Track the issue as CVE-2026-58094 or ZDI-26-785. The advisory was published and last modified on 2026-10-16.