CVE-2026-14258 | A flaw was found in dhcpcd's IPv6 Neighbor Discovery Router … | CVSS 6.5 MEDIUM

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.

Metadata

CVE ID: CVE-2026-14258
State: PUBLISHED
Assigner: redhat
Reserved: 2026-06-30 15:57 UTC
Published: 2026-07-01 09:24 UTC
Last updated: 2026-07-01 12:20 UTC
Primary CWE: CWE-835
Loop with Unreachable Exit Condition ('Infinite Loop')
Vendor / Product: Red Hat / Red Hat Enterprise Linux 10
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
Red Hat	Red Hat Enterprise Linux 10	—	—

Weakness (CWE)

CWE	Source	Description
CWE-835	cna	Loop with Unreachable Exit Condition ('Infinite Loop')

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.5	MEDIUM	3.1	cna	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (4)