HIGH 7.5 Microsoft
CVE-2026-6507
Dnsmasq: dnsmasq: denial of service due to out-of-bounds write in dhcp bootreply processing
Microsoft Security Update 2026-Apr: Dnsmasq: dnsmasq: denial of service due to out-of-bounds write in dhcp bootreply processing
Affected Products
- azl3 dnsmasq 2.90-1 on Azure Linux 3.0
- cbl2 dnsmasq 2.90-1 on CBL Mariner 2.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-6507
- https://nvd.nist.gov/vuln/detail/CVE-2026-6507
This high severity vulnerability with a CVSS score of 7.5 was published on 2026-04-14 via Microsoft. Affected: azl3 dnsmasq 2.90-1 on Azure Linux 3.0, cbl2 dnsmasq 2.90-1 on CBL Mariner 2.0.
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