CVE-2026-5172

HIGH 7.3

CVE-2026-5172

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

9th

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.

Vendor	dnsmasq
Product	dnsmasq
Published	May 11, 2026
Last Updated	May 13, 2026

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Affected Versions

dnsmasq / dnsmasq

2.92rel2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

kb.cert.org: https://www.kb.cert.org/vuls/id/471747 lists.thekelleys.org.uk: https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html thekelleys.org.uk: https://thekelleys.org.uk/dnsmasq/CVE/ 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