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CVE-2026-2291

Quick assessment

Affected
dnsmasq dnsmasq
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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extract_name函数可被利用导致堆缓冲区溢出，允许攻击者注入虚假DNS缓存条目，可能导致DNS查询重定向至攻击者控制的IP地址或导致拒绝服务。

AI Predicted 9.8 Difficulty: Moderate EPSS 0.61% · P47

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
dnsmasq dnsmasq < 2.92rel2 affected
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I. Basic Information for CVE-2026-2291

Vulnerability Information
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Vulnerability Title
CVE-2026-2291
Source: CVE Program / CVE List V5
Vulnerability Description
dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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extract_name函数可被利用导致堆缓冲区溢出，允许攻击者注入虚假DNS缓存条目，可能导致DNS查询重定向至攻击者控制的IP地址或导致拒绝服务。
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

Vendor Product Affected Versions CPE Subscribe
dnsmasq dnsmasq 0 ~ 2.92rel2 -

II. Public POCs for CVE-2026-2291

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III. Intelligence Information for CVE-2026-2291

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Patches & Fixes for CVE-2026-2291 (3)

Vendor Advisories for CVE-2026-2291 (2)

Mailing List Discussions for CVE-2026-2291 (1)

Vendor Pages for CVE-2026-2291 (1)

Same Patch Batch · dnsmasq · 2026-05-11 · 6 CVEs total

CVE-2026-4892 CVE-2026-4892
CVE-2026-4891 CVE-2026-4891
CVE-2026-4893 CVE-2026-4893
CVE-2026-4890 CVE-2026-4890
CVE-2026-5172 CVE-2026-5172

IV. Related Vulnerabilities

Same product: dnsmasq
Same vendor: dnsmasq

V. Comments for CVE-2026-2291

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