CVE-2026-14258

MEDIUM 6.5

Dhcpcd: dhcpcd infinite loop and out-of-bounds read via zero-length ipv6 nd option in router advertisement handling

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-835
Vendor	red hat
Product	red hat enterprise linux 10
Published	Jul 1, 2026
Last Updated	Jul 1, 2026

Stay Ahead of the Next One

Get instant alerts for red hat red hat enterprise linux 10

Be the first to know when new medium vulnerabilities affecting red hat red hat enterprise linux 10 are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

Red Hat / Red Hat Enterprise Linux 10

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-14258 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2462305 github.com: https://github.com/NetworkConfiguration/dhcpcd/commit/75289ca github.com: https://github.com/NetworkConfiguration/dhcpcd/issues/415

Credits

Red Hat would like to thank AISLE Research for reporting this issue.