CVE-2026-93009
mediumA 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.
CVSS
4.3
4.3 (CVSS v3.1)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Severity source: NVD CVSS v3.1 (secalert@redhat.com)
Timeline (UTC)
Published: 2026-10-29 14:18
Modified: 2026-10-29 14:18
NVD status: Awaiting Analysis
Last synced 7 hours ago
Verified against the source API 2026-10-29 14:37 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://access.redhat.com/security/cve/CVE-2026-93009 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2536083 secalert@redhat.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-29 14:37 UTC · record ↗