{"id":"CVE-2021-36977","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-36977","generatedAt":"2026-10-27T20:54:22.386Z","title":"matio (aka MAT File I/O Library) 1.5.20 and 1.5.21 has a heap-based buffer overflow in H5MM_memcpy (called from H5MM_malloc and H5C_load_entry), related to use of HDF5 1.12.0.","description":"matio (aka MAT File I/O Library) 1.5.20 and 1.5.21 has a heap-based buffer overflow in H5MM_memcpy (called from H5MM_malloc and H5C_load_entry), related to use of HDF5 1.12.0.","published":"2021-07-20T07:15:08.000Z","lastModified":"2026-06-17T03:59:46.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},"cwe":["CWE-787"],"affected":["matio project/matio"],"epss":{"score":0.01496,"percentile":0.74013,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.50%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31265","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/HDFGroup/hdf5/issues/272","tags":["Issue Tracking","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/matio/OSV-2021-440.yaml","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/google/oss-fuzz-vulns/commit/37b781ace1b4228fc36483bb7e30c72ea9d4c3d6","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/google/oss-fuzz/issues/4999","tags":["Issue Tracking","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31265","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/HDFGroup/hdf5/issues/272","tags":["Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/matio/OSV-2021-440.yaml","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/google/oss-fuzz-vulns/commit/37b781ace1b4228fc36483bb7e30c72ea9d4c3d6","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/google/oss-fuzz/issues/4999","tags":["Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-36977","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}