CVE-2026-2291
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...
- Published
- May 11, 2026
- Updated
- Jul 20, 2026
- Assigning CNA
- certcc
- Evidence observed
- Aug 17, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:LLow · next 30 days
- Percentile
- 47.6%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
1- dnsmasq-cve-2026Scanner
Automated defect verification tool for 6 dnsmasq CVEs (CVE-2026-2291, 4890, 4891, 4892, 4893, 5172)
Responsible use
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