CVE-2022-42917

6.7 mediumEPSS 0.1%

Medium (6.7). EPSS 0.1% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.7 medium

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-10-31)
CWE: CWE-367
Published: 2026-09-14
Modified: 2026-09-22
Record from: the NVD, synced 2026-10-19

References

https://bugzilla.suse.com/show_bug.cgi?id=1204124
https://frrouting.org/security/cve-2022-42917/
https://github.com/FRRouting/frr/commit/972cdc560e339d70c0ee5fb70ec636ab78f00bca
https://github.com/FRRouting/frr/compare/frr-8.4...frr-8.5

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