CVE-2026-14258

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 3.1

6.5CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-25)

CWE

CWE-835

Published

2026-07-01

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

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

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