CVE-2026-6507 in dnsmasq

Résumé

par MITRE • 17/04/2026

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).

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• Responsable: Redhat
• Réserver: 17/04/2026
• Divulgation: 17/04/2026
• Modérer: accepté
• Entrée: VDB-358081
• CPE: prêt
• CWE: CWE-787 (confirmé)
• CVSS: 7.5 (CNA)
• EPSS: 0.00047
• KEV: non
• Activités: très faible
• Secteur: Hostingprovider, Finance, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-6507
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6507
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-6507/