CVE-2021-43412: GNU Hurd

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue was discovered in GNU Hurd before 0.9 20210404-9. libports accepts fake notification messages from any client on any port, which can lead to port use-after-free. This can be exploited for local privilege escalation to get full root access.

Affected products

• GNU Hurd: before 0.9.20210404-9 (fixed in 0.9.20210404-9)

Published 2021-11-07. Last modified 2026-06-17.