CVE-2026-2291

CVSS 7.3 HIGHEPSS 0.8%

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.

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

Affected products

dnsmasq · dnsmasq

public PoCs found — 1

githubgithub.com/JianrongXiao-Linksys/dnsmasq-cve-2026★ 0

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

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 https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html https://thekelleys.org.uk/dnsmasq/CVE/https://www.kb.cert.org/vuls/id/471747 https://www.suse.com/security/cve/CVE-2026-2291.html