CVE-2022-42917
Medium
Description
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.
SeverityMedium
CVSS6.7
Exploit probability—
ProductFRRouting
PublishedSep 14, 2026
First seenSep 14, 2026
Weakness typeCWE-367CWE-367
How to fix
Update
- FRRouting FRRouting4.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| FRRouting FRRouting | v < 4.5 | 4.5 |
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