VDB
CVE-2026-2291
CVE-2026-2291
PUBLISHED
CVSS 9.300000190734863 CRITICAL
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.
EPSS 0.08% · 22.8th percentile
Risk Scores
CVSS v4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS Score
0.08%
22.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| dnsmasq | dnsmasq | 2.92rel2 |
Timeline
- May 11, 2026 CVE Published
- May 11, 2026 Security Advisory
- May 13, 2026 CVE Updated
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 19, 2026 Distribution Patch
- May 19, 2026 Security Advisory
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
References
- https://www.suse.com/security/cve/CVE-2026-2291.html url
- https://www.kb.cert.org/vuls/id/471747 url
- https://thekelleys.org.uk/dnsmasq/CVE/ url
- https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html url
- https://github.com/NixOS/nixpkgs/pull/519082 url
- https://github.com/NixOS/nixpkgs/pull/519093 url
- https://nvd.nist.gov/vuln/detail/CVE-2026-2291 advisory
- https://thekelleys.org.uk/dnsmasq/doc.html url