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.
Published: 2026-09-13
Score: 6.7 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 14 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Title frr: FRRouting FRR: Privilege escalation via TOCTOU race condition
References
Metrics threat_severity

None

threat_severity

Moderate


Sun, 13 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Frrouting
Frrouting frrouting
Weaknesses CWE-367
CPEs cpe:2.3:a:frrouting:frrouting:*:*:*:*:*:*:*:*
Vendors & Products Frrouting
Frrouting frrouting
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H'}


Sun, 13 Sep 2026 23:30:00 +0000

Type Values Removed Values Added
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.
References

Subscriptions

Frrouting Frrouting
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-14T18:15:19.986Z

Reserved: 2022-10-13T00:00:00.000Z

Link: CVE-2022-42917

cve-icon Vulnrichment

Updated: 2026-09-14T15:03:59.389Z

cve-icon NVD

Status : Received

Published: 2026-09-14T00:16:55.700

Modified: 2026-09-14T19:17:07.717

Link: CVE-2022-42917

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-13T00:00:00Z

Links: CVE-2022-42917 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-14T14:00:05Z

Weaknesses