CVE-2026-14258
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.
Does this matter?
Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 6.5 MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.27% probability · 18th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Source
- secalert@redhat.com
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.