frr: In FRRouting FRR before 8.5, the service user (usually frr) can escalate its privileges to root by monitoring the con...
CVE-2022-42917 is fixed in frr on 1 platform, first by DEBIAN-CVE-2022-42917, released September 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| frr · Debian 12.15 (bookworm) | 8.4.1-1 | DEBIAN-CVE-2022-42917 | Sep 17, 2026 |
| frr · Debian 13.5 (trixie) | 8.4.1-1 | DEBIAN-CVE-2022-42917 | Sep 17, 2026 |
| frr · Debian 14 | 8.4.1-1 | DEBIAN-CVE-2022-42917 | Sep 17, 2026 |
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