Vulnerability DatabaseCVE-2026-5172
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CVE-2026-5172
Published:May 11, 2026
Updated:May 16, 2026
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.
Affected Packages
https://github.com/imp/dnsmasq.git (GITHUB):
Affected version(s) >=v2.0 <v2.92rel2
Fix Suggestion:
Update to version v2.92rel2
Related Resources (7)
https://thekelleys.org.uk/dnsmasq/CVE/
https://github.com/NixOS/nixpkgs/pull/519093
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html
https://thekelleys.org.uk/dnsmasq/
https://github.com/pi-hole/FTL/releases/tag/v6.6.2
https://www.kb.cert.org/vuls/id/471747
https://github.com/NixOS/nixpkgs/pull/519082
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CVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
EPSS
Base Score:
0.06