MEDIUM 4.3 NVD
CVE-2026-93009
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 b
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.
References
- https://access.redhat.com/security/cve/CVE-2026-93009
- https://bugzilla.redhat.com/show_bug.cgi?id=2536083
This medium severity vulnerability with a CVSS score of 4.3 was published on 2026-10-29 via NVD.
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