CVE-2022-42917
In FRRouting FRR before 8.5, the service user (usually frr) can escalate its privileges to root by monitoring the configuration directory (/etc/frr) and replacing config files upon creation with, for example, symlinks to change the ownership of arbitrary files. This is a TOCTOU Race Condition caused by a combination of touch and chown.
- Published Sep 14, 2026
- CVSS 6.7 medium
- 0.1% chance of exploitation in the next 30 days (EPSS)
- A fix is available