CVE-2026-5172
High
Description
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.
SeverityHigh
CVSS7.3
Exploit probability—
ProductDnsmasq
PublishedMay 11, 2026
First seenMay 11, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- dnsmasq dnsmasq2.92rel2 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| dnsmasq dnsmasq | v < 2.92rel2 | 2.92rel2 |
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