{"api_version":"1","generated_at":"2026-04-22T23:08:41+00:00","cve":"CVE-2021-3696","urls":{"html":"https://cve.report/CVE-2021-3696","api":"https://cve.report/api/cve/CVE-2021-3696.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-3696","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-3696"},"summary":{"title":"CVE-2021-3696","description":"A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. 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the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12."}]}},"nvd":{"publishedDate":"2022-07-06 16:15:00","lastModifiedDate":"2023-09-13 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RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.","Type":"Description","Title":null}]}}}