Critical severity9.8NVD Advisory· Published Jan 1, 2022· Updated Jun 17, 2026
CVE-2021-45957
CVE-2021-45957
Description
Dnsmasq 2.86 has a heap-based buffer overflow in answer_request (called from FuzzAnswerTheRequest and fuzz_rfc1035.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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3cpe:2.3:a:thekelleys:dnsmasq:2.86:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:thekelleys:dnsmasq:2.86:*:*:*:*:*:*:*
- (no CPE)range: =2.86
- Dnsmasq/Dnsmasqdescription
Patches
Vulnerability mechanics
References
4- bugs.chromium.org/p/oss-fuzz/issues/detailnvdExploitIssue TrackingThird Party Advisory
- github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-935.yamlnvdThird Party Advisory
- lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.htmlnvdMailing ListThird Party Advisory
- lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.htmlnvdMailing ListThird Party Advisory
News mentions
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