VDB
CVE-2026-4891
CVE-2026-4891
PUBLISHED
CVSS 8.699999809265137 HIGH
A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
EPSS 0.07% · 21.8th percentile
Risk Scores
CVSS v4.0
8.699999809265137
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS Score
0.07%
21.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| dnsmasq | dnsmasq | 2.92rel2 |
Timeline
- May 11, 2026 CVE Published
- May 11, 2026 PoC Published
- May 12, 2026 Security Advisory
- 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://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html url
- https://www.kb.cert.org/vuls/id/471747 url
- https://thekelleys.org.uk/dnsmasq/CVE/ url
- https://github.com/NixOS/nixpkgs/pull/519082 url
- https://github.com/NixOS/nixpkgs/pull/519093 url
- https://github.com/pi-hole/FTL/releases/tag/v6.6.2 url
- https://nvd.nist.gov/vuln/detail/CVE-2026-4891 advisory
- https://thekelleys.org.uk/dnsmasq url
- https://thekelleys.org.uk/dnsmasq/CVE url