VDB
CVE-2026-5172
CVE-2026-5172
PUBLISHED
CVSS 9.300000190734863 CRITICAL
A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.
EPSS 0.02% · 7.2th 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
0.02%
7.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| dnsmasq | dnsmasq | 2.92rel2 |
Timeline
- May 11, 2026 CVE Published
- May 11, 2026 PoC Published
- May 11, 2026 PoC Published
- May 12, 2026 Security Advisory
- May 13, 2026 EPSS Score
- 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
References
- https://www.kb.cert.org/vuls/id/471747 url
- https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html 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-2026-5172 advisory
- https://thekelleys.org.uk/dnsmasq url
- https://thekelleys.org.uk/dnsmasq/CVE url