CVE-2026-5172

HIGH EPSS 46.4%

Published May 11, 20261mo ago · Modified Jun 17, 20261w ago

7.3 CVSS 3.1

High

Published May 11, 2026 1mo ago

Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score

7.3

Exploitability

3.9

Impact

3.4

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality Low

Integrity Low

Availability Low

Threat Intelligence

EPSS Exploit Probability

46.4% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

References 6

github.com https://github.com/NixOS/nixpkgs/pull/519082
github.com https://github.com/NixOS/nixpkgs/pull/519093
github.com https://github.com/pi-hole/FTL/releases/tag/v6.6.2
lists.thekelleys.org.uk https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html
thekelleys.org.uk https://thekelleys.org.uk/dnsmasq/CVE/
kb.cert.org https://www.kb.cert.org/vuls/id/471747

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.