OSV-2026-98 Heap-buffer-overflow in hostname_issubdomain

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=476539622 Crash type: Heap-buffer-overflow READ 1 Crash state: hostnameissubdomain fuzzutil.c...

Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from hash_questions and fuzz_util.c). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities to the best of our knowledge.

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AZL-8960 CVE-2021-45953 affecting package dnsmasq for versions less than 2.89-1

Dnsmasq 2.86 has a heap-based buffer overflow in extractname called from hashquestions and fuzzutil.c. NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge...