CVE-2026-14258

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-07-01. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

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

A flaw was found in dhcpcd's IPv6 Neighbor Discovery Router Advertisement processing. A specially crafted IPv6 Router Advertisement containing a zero-length Neighbor Discovery option can bypass validation during packet storage and later be reparsed without adequate validation, causing the parser to enter a non-advancing loop. Successful exploitation may result in excessive CPU consumption, leading to a denial of service.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
17.2%
KEV
Not listed

Published

July 1, 2026

Last Modified

July 1, 2026

Advisory Details (4)

Auto-updated Jul 1, 2026
Patch available. Sources: redhat, github_commit.
generic

Router advertisements with zero-length options trigger an infinite loop · Issue #415 · NetworkConfiguration/dhcpcd · GitHub

https://github.com/NetworkConfiguration/dhcpcd/issues/415
github_commit Patch Available

commit 75289ca (NetworkConfiguration/dhcpcd)

Patch available: NetworkConfiguration/dhcpcd v10.2.0 (contains commit 75289ca)

https://github.com/NetworkConfiguration/dhcpcd/commit/75289ca
redhat

2462305 – (CVE-2026-14258) CVE-2026-14258 dhcpcd: dhcpcd infinite loop and out-of-bounds read via zero-length IPv6 ND option in Router Advertisement handling

https://bugzilla.redhat.com/show_bug.cgi?id=2462305
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-14258

Vendor Advisories for CVE-2026-14258(2)

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 9× in last 7d / 51× 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. 2026-07-24 14:17 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:05 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-21 15:24 UTCEPSS rescore
  6. 2026-07-20 17:08 UTCEPSS rescore
  7. 2026-07-19 14:30 UTCEPSS rescore
  8. 2026-07-19 02:28 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-16 17:02 UTCEPSS rescore
  11. 2026-07-16 10:59 UTCVendor advisory
  12. 2026-07-16 10:59 UTCGHSA enrichment
  13. 2026-07-15 16:57 UTCEPSS rescore
  14. 2026-07-15 09:19 UTCVendor advisory
  15. 2026-07-15 09:19 UTCGHSA enrichment
  16. 2026-07-15 02:00 UTCEPSS rescore
  17. 2026-07-14 07:36 UTCVendor advisory
  18. 2026-07-14 07:36 UTCGHSA enrichment
  19. 2026-07-13 22:30 UTCEPSS rescore
  20. 2026-07-13 06:12 UTCEPSS rescore
  21. 2026-07-13 05:55 UTCVendor advisory
  22. 2026-07-13 05:55 UTCGHSA enrichment
  23. 2026-07-12 05:46 UTCEPSS rescore
  24. 2026-07-12 04:15 UTCVendor advisory
  25. 2026-07-12 04:15 UTCGHSA enrichment
Show 26 more
  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-11 02:34 UTCVendor advisory
  3. 2026-07-11 02:33 UTCGHSA enrichment
  4. 2026-07-10 00:53 UTCVendor advisory
  5. 2026-07-10 00:53 UTCGHSA enrichment
  6. 2026-07-09 19:10 UTCEPSS rescore
  7. 2026-07-08 23:10 UTCVendor advisory
  8. 2026-07-08 23:10 UTCGHSA enrichment
  9. 2026-07-08 15:15 UTCEPSS rescore
  10. 2026-07-08 15:15 UTCEPSS rescore
  11. 2026-07-07 21:27 UTCVendor advisory
  12. 2026-07-07 21:27 UTCGHSA enrichment
  13. 2026-07-07 13:46 UTCEPSS rescore
  14. 2026-07-06 19:47 UTCVendor advisory
  15. 2026-07-06 19:47 UTCGHSA enrichment
  16. 2026-07-06 16:27 UTCEPSS rescore
  17. 2026-07-06 02:23 UTCEPSS rescore
  18. 2026-07-05 18:06 UTCGHSA enrichment
  19. 2026-07-05 02:30 UTCEPSS rescore
  20. 2026-07-05 02:30 UTCEPSS rescore
  21. 2026-07-04 16:25 UTCGHSA enrichment
  22. 2026-07-04 06:31 UTCEPSS rescore
  23. 2026-07-03 14:44 UTCGHSA enrichment
  24. 2026-07-02 13:05 UTCGHSA enrichment
  25. 2026-07-01 11:24 UTCEG score recompute
  26. 2026-07-01 11:23 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-14258?
CVE-2026-14258 is a medium vulnerability published on July 1, 2026. A flaw was found in dhcpcd's IPv6 Neighbor Discovery Router Advertisement processing. A specially crafted IPv6 Router Advertisement containing a zero-length Neighbor Discovery option can bypass validation during packet storage and later be reparsed without adequate validation, causing the parser to…
When was CVE-2026-14258 disclosed?
CVE-2026-14258 was first published in the National Vulnerability Database on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-14258 actively exploited?
CVE-2026-14258 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-14258?
CVE-2026-14258 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-14258?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-14258, 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

Explore the affected products and dependency analysis for CVE-2026-14258

Explore →

Is Your Infrastructure Affected by CVE-2026-14258?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs