CVE-2026-5172
7.3
HIGH
CVSS 3.1
EPSS 0.02%
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.
How to fix CVE-2026-5172
To remediate CVE-2026-5172, upgrade the affected package to a fixed version below.
- Alpine/dnsmasq—upgrade to 2.91-r1 or later
- —no fix listed
Is CVE-2026-5172 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.91-r1
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |