A flaw was found in dnsmasq.
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.
Read at NIST National Vulnerability Database (CVE API 2.0)
- Vendor
- Red Hat
- Product
- Red Hat Ceph Storage 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6
- CVSS v3.1
- 4.3 AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness
- CWE-125
- Exposure class
- Edge / VPN / firewall, Storage / NAS, Operating system
- NVD status
- Awaiting Analysis
Why it ranks 21 (Routine)
- CVSS v3.1 4.3 medium
- Exposed product class: edge / VPN / firewall, hypervisor
- Recency: items published within 24 hours gain 15, within 72 hours 6, within 7 days 2.
Links
- NIST National Vulnerability Database (CVE API 2.0) (nvd.nist.gov)
- CVE-2026-93009 on this site · NVD · CVE.org · Vulnpedia
Related coverage
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