CVE-2026-14258
MEDIUMDhcpcd: dhcpcd infinite loop and out-of-bounds read via zero-length ipv6 nd option in router advertisement handling
Title source: cnaDescription
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.
References (4)
Core 4
Core References
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-14258
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2462305
https://bugzilla.redhat.com/show_bug.cgi?id=2462305
Scores
CVSS v3
6.5
EPSS
0.0025
EPSS Percentile
15.9%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-835
Status
published
Products (1)
Red Hat/Red Hat Enterprise Linux 10
Published
Jul 01, 2026
Tracked Since
Jul 01, 2026