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CVE-2026-5172

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_addresses函数中的缓冲区溢出，允许攻击者通过利用格式错误的DNS响应触发基于堆的越界读取并导致崩溃，使extract_name函数将指针推进到记录末尾之后。

AI Predicted 7.5 Difficulty: Easy EPSS 0.69% · P51

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-2026-5172

Vulnerability Information
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Vulnerability Title
CVE-2026-5172
Source: CVE Program / CVE List V5
Vulnerability Description
A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.
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_addresses函数中的缓冲区溢出，允许攻击者通过利用格式错误的DNS响应触发基于堆的越界读取并导致崩溃，使extract_name函数将指针推进到记录末尾之后。
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-2026-5172

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III. Intelligence Information for CVE-2026-5172

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Patches & Fixes for CVE-2026-5172 (3)

Vendor Advisories for CVE-2026-5172 (1)

Mailing List Discussions for CVE-2026-5172 (1)

Vendor Pages for CVE-2026-5172 (1)

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

CVE-2026-2291 CVE-2026-2291
CVE-2026-4892 CVE-2026-4892
CVE-2026-4891 CVE-2026-4891
CVE-2026-4893 CVE-2026-4893
CVE-2026-4890 CVE-2026-4890

IV. Related Vulnerabilities

Same product: dnsmasq
Same vendor: dnsmasq

V. Comments for CVE-2026-5172

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