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CVE-2026-14258— Dhcpcd: dhcpcd infinite loop and out-of-bounds read via zero-length ipv6 nd option in router advertisement handling

CVSS 6.5 · Medium EPSS 0.26% · P17

Possible ATT&CK Techniques 1AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 10anyaffected
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I. Basic Information for CVE-2026-14258

Vulnerability Information
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Vulnerability Title
Dhcpcd: dhcpcd infinite loop and out-of-bounds read via zero-length ipv6 nd option in router advertisement handling
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: CVE Program / CVE List V5
Vulnerability Title
dhcpcd project dhcpcd 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
dhcpcd project dhcpcd是dhcpcd project团队开源的一款DHCP服务器程序。 dhcpcd project dhcpcd 存在资源管理错误漏洞，该漏洞源于在IPv6邻居发现路由器公告处理过程中对零长度选项的验证不足，导致解析器进入非前进循环，成功利用可能造成CPU过度消耗，导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat Enterprise Linux 10-cpe:/o:redhat:enterprise_linux:10

II. Public POCs for CVE-2026-14258

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III. Intelligence Information for CVE-2026-14258

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Patches & Fixes for CVE-2026-14258 (2)

Vendor Advisories for CVE-2026-14258 (1)

Same Patch Batch · Red Hat · 2026-07-01 · 7 CVEs total

CVE-2026-51368.8 HIGHForeman: foreman: privilege escalation to administrator-level access via usergroup role as
CVE-2026-51426.5 MEDIUMForeman: foreman: cross-tenant private ssh key disclosure via taxonomy scoping bypass
CVE-2026-51356.5 MEDIUMForeman: foreman: unauthorized modification of host configurations via broken access contr
CVE-2026-143246.5 MEDIUMPipewire: raop rtsp null deref
CVE-2026-143305.5 MEDIUMPipewire: pulse server alloca stack overflow
CVE-2026-51384.3 MEDIUMForeman: foreman: information disclosure via improper validation of nested request paramet

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-835

V. Comments for CVE-2026-14258

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