CVE-2026-93009
MEDIUM
NVD
CVSS Score
4.3
Severity
MEDIUM
Published
Oct 29, 2026
Vendor
unknown
Description
A flaw was found in dnsmasq. The DHCPv6 client hostname parser can read one byte past the end of a crafted FQDN option because it checks the next label length before confirming the pointer is still inside the option. An attacker on the local network can trigger this with a single DHCPv6 packet. The extra byte is not returned to the client or logged, and no crash has been demonstrated.