CVE-2026-2291
CVE-2026-2291
- State
- Published
- Severity
- 7.3 High
- Published
- May 11, 2026
- Updated
- Jul 20, 2026
- Reserved
- Feb 10, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.3 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L | CISA-ADP |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
dnsmasqdnsmasq |
|
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
- http://www.openwall.com/lists/oss-security/2026/07/20/14
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