CVE-2026-2291

Published: May 11, 2026

Modified: May 20, 2026

PUBLISHED

Description

dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.

Vendor	Product	Versions
dnsmasq	dnsmasq	affected `0 - < 2.92rel2`

References

https://www.suse.com/security/cve/CVE-2026-2291.html

https://www.kb.cert.org/vuls/id/471747

https://thekelleys.org.uk/dnsmasq/CVE/

https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html

https://github.com/NixOS/nixpkgs/pull/519082

https://github.com/NixOS/nixpkgs/pull/519093

https://github.com/pi-hole/FTL/releases/tag/v6.6.2

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CVE-2026-2291

Description

Affected Products

References