Vulnerability Description
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 Score
MEDIUM
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2026:54210
- https://access.redhat.com/security/cve/CVE-2026-14258
- https://bugzilla.redhat.com/show_bug.cgi?id=2462305
- https://github.com/NetworkConfiguration/dhcpcd/commit/75289ca
- https://github.com/NetworkConfiguration/dhcpcd/issues/415
- https://github.com/NetworkConfiguration/dhcpcd/issues/415
FAQ
What is CVE-2026-14258?
CVE-2026-14258 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 valida...
How severe is CVE-2026-14258?
CVE-2026-14258 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-14258?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.