CVE-2022-42917

MEDIUMPre-NVD 6.76.7—
EchelonGraph scoreHIGH confidence

Score 6.7 from GitHub Security Advisory published 2026-09-14. a secondary CVSS source baseline 6.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
6.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.7Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.7
EG Score
6.7(high)
EG Risk
30(Track)
EG Risk 30/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity67% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

September 13, 2026

Last Modified

September 14, 2026

Advisory Details (4)

Auto-updated Sep 14, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Comparing frr-8.4...frr-8.5 · FRRouting/frr · GitHub

https://github.com/FRRouting/frr/compare/frr-8.4...frr-8.5
github_commit

commit 972cdc560e33 (FRRouting/frr)

Fix landed in FRRouting/frr commit 972cdc560e33 — awaiting tagged release

https://github.com/FRRouting/frr/commit/972cdc560e339d70c0ee5fb70ec636ab78f00bca
generic

CVE-2022-42917 – FRRouting

https://frrouting.org/security/cve-2022-42917/
generic

Making sure you're not a bot!

https://bugzilla.suse.com/show_bug.cgi?id=1204124

Vendor Advisories for CVE-2022-42917(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 21× in last 7d / 21× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 16:50 UTCEG score recompute
  2. 2026-09-19 16:50 UTCGHSA enrichment
  3. 2026-09-19 15:38 UTCEPSS rescore
  4. 2026-09-18 18:13 UTCGHSA enrichment
  5. 2026-09-17 19:35 UTCEG score recompute
  6. 2026-09-17 19:35 UTCGHSA enrichment
  7. 2026-09-16 17:58 UTCEG score recompute
  8. 2026-09-16 17:58 UTCGHSA enrichment
  9. 2026-09-16 14:05 UTCEPSS rescore
  10. 2026-09-16 05:10 UTCEPSS rescore
  11. 2026-09-15 18:15 UTCEG score recompute
  12. 2026-09-15 18:15 UTCGHSA enrichment
  13. 2026-09-15 03:07 UTCEPSS rescore
  14. 2026-09-14 19:21 UTCEG score recompute
  15. 2026-09-14 19:21 UTCGHSA enrichment
  16. 2026-09-14 18:27 UTCEG score recompute
  17. 2026-09-14 18:27 UTCGHSA enrichment
  18. 2026-09-14 00:20 UTCEG score recompute▲ 6.70
  19. 2026-09-14 00:19 UTCNVD updateCVSS v3 → 6.7 · severity → MEDIUM
  20. 2026-09-13 23:30 UTCEG score recompute
  21. 2026-09-13 23:29 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2022-42917?
CVE-2022-42917 is a medium vulnerability published on September 13, 2026. 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…
When was CVE-2022-42917 disclosed?
CVE-2022-42917 was first published in the National Vulnerability Database on September 13, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-42917 actively exploited?
CVE-2022-42917 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.9% of all scored CVEs.
What is the CVSS score of CVE-2022-42917?
CVE-2022-42917 has a CVSS v3 base score of 6.7 (NVD).
How do I remediate CVE-2022-42917?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-42917, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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