CVE-2026-4891
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-4891
Vulnerability Information
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Vulnerability Title
CVE-2026-4891
Source: NVD (National Vulnerability Database)
Vulnerability Description
A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
DNSmasq 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
DNSmasq是Simon Kelley个人开发者的一个DNS配置工具。 DNSmasq存在安全漏洞，该漏洞源于DNSSEC验证中的基于堆的越界读取，允许远程攻击者通过特制DNS数据包导致拒绝服务。
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
II. Public POCs for CVE-2026-4891
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · dnsmasq · 2026-05-11 · 6 CVEs total
| CVE-2026-2291 | CVE-2026-2291 | |
| CVE-2026-4892 | CVE-2026-4892 | |
| CVE-2026-4893 | CVE-2026-4893 | |
| CVE-2026-4890 | CVE-2026-4890 | |
| CVE-2026-5172 | CVE-2026-5172 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-4891
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