CVE-2026-6507
High
Description
A flaw was found in dnsmasq. A remote attacker could exploit an out-of-bounds write vulnerability by sending a specially crafted BOOTREPLY (Bootstrap Protocol Reply) packet to a dnsmasq server configured with the `--dhcp-split-relay` option. This can lead to memory corruption, causing the dnsmasq daemon to crash and resulting in a denial of service (DoS).
SeverityHigh
CVSS7.5
Exploit probability42. percentile0.5%
ProductDnsmasq
PublishedApr 17, 2026
First seenApr 17, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- dnsmasq2.93 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| dnsmasq | 2.92 ≤ v < 2.93 | 2.93 |
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