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    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.

    Published:Jul 1, 2026
    Last Modified:Aug 12, 2026
    EPS:Jul 1, 2026
    EPSS Score:0.00256
    CVSS Score:6.5

    Affected Products

    Vendor
    Dhcpcd Project
    Product
    Dhcpcd
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-56117 (CVSS 5.7) — dhcpcd through 10.3.2, fixed in commit 78ea09e, contains a heap use-after-free vulnerability in the control so…
    CVE-2026-56116 (CVSS 7.1) — dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advert…
    CVE-2026-56114 (CVSS 6) — dhcpcd through 10.3.2, fixed in commit 2f00c7b, contains a one-byte stack out-of-bounds write vulnerability in…
    CVE-2026-56113 (CVSS 6) — dhcpcd through 10.3.2, fixed in commit 5733d3c, contains a heap use-after-free vulnerability that allows unaut…
    CVE-2025-70102 (CVSS 6.3) — A NULL pointer dereference occurs in Roy Marples NetworkConfiguration/dhcpcd 10.3.0 while parsing configuratio…
    CVE-2019-11766 (CVSS 9.8) — dhcp6.c in dhcpcd before 6.11.7 and 7.x before 7.2.2 has a buffer over-read in the D6_OPTION_PD_EXCLUDE featur…
    CVE-2019-11579 (CVSS 5.3) — dhcp.c in dhcpcd before 7.2.1 contains a 1-byte read overflow with DHO_OPTSOVERLOADED.…
    CVE-2019-11578 (CVSS 5.9) — auth.c in dhcpcd before 7.2.1 allowed attackers to infer secrets by performing latency attacks.…
    CVE-2019-11577 (CVSS 9.8) — dhcpcd before 7.2.1 contains a buffer overflow in dhcp6_findna in dhcp6.c when reading NA/TA addresses.…
    CVE-2016-1504 (CVSS 7.5) — dhcpcd before 6.10.0 allows remote attackers to cause a denial of service (invalid read and crash) via vectors…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High