What’s Vulnerable › Vulnerabilities

CVE-2021-36977

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-20 · updated 2026-06-17
• Weakness: CWE-787

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.

Affected products

• tbeu matio: 1.5.20, 1.5.21

References

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31265
• https://github.com/HDFGroup/hdf5/issues/272
• https://github.com/google/oss-fuzz-vulns/blob/main/vulns/matio/OSV-2021-440.yaml
• https://github.com/google/oss-fuzz-vulns/commit/37b781ace1b4228fc36483bb7e30c72ea9d4c3d6
• https://github.com/google/oss-fuzz/issues/4999
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31265
• https://github.com/HDFGroup/hdf5/issues/272
• https://github.com/google/oss-fuzz-vulns/blob/main/vulns/matio/OSV-2021-440.yaml
• https://github.com/google/oss-fuzz-vulns/commit/37b781ace1b4228fc36483bb7e30c72ea9d4c3d6
• https://github.com/google/oss-fuzz/issues/4999

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