CVE-2022-42917CWE-367

CVE-2022-42917

Medium · published September 14, 2026

CVSS v3.1
6.7
EPSS
0%
Percentile
2.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.7 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00130 · 2.4th percentile
Weakness
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition
Published
2026-09-14T04:16Z
References (4)
https://bugzilla.suse.com/show_bug.cgi?id=1204124 · [email protected]https://frrouting.org/security/cve-2022-42917/ · [email protected]https://github.com/FRRouting/frr/commit/972cdc560e339d70c0ee5fb70ec636ab78f00bca · [email protected]https://github.com/FRRouting/frr/compare/frr-8.4...frr-8.5 · [email protected]
EPSS history
Timeline
  • 15 SEP 03:11Z
    EPSS moved — → 0%
    epss
  • 13 SEP 00:00Z
    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…
    cvelistv5