CVE-2021-43413: GNU Hurd

High severity, CVSS 8.8. EPSS: 2% chance of exploitation in the next 30 days.

An issue was discovered in GNU Hurd before 0.9 20210404-9. A single pager port is shared among everyone who mmaps a file, allowing anyone to modify any files that they can read. This can be trivially exploited 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.