CVE-2026-2291
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.3epss 0.6%
from disclosure to weapon21 days
Published on NVDMay 11
1st PoC+21d
exploitation probability
0.6%top 53% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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 · dnsmasqpublic 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.
References
https://github.com/NixOS/nixpkgs/pull/519082https://github.com/NixOS/nixpkgs/pull/519093https://github.com/pi-hole/FTL/releases/tag/v6.6.2https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.htmlhttps://thekelleys.org.uk/dnsmasq/CVE/https://www.kb.cert.org/vuls/id/471747https://www.suse.com/security/cve/CVE-2026-2291.htmlhttp://www.openwall.com/lists/oss-security/2026/07/20/14