matio (aka MAT File I/O Library) 1.5.20 and 1.5.21 has a heap-based buffer overflow in…
Priority LOW 32CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.01496 74th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:matio_project:matio:1.5.20:*:*:*:*:*:*:* | 1.5.20 | Vulnerable | Matio Project |
| cpe:2.3:a:matio_project:matio:1.5.21:*:*:*:*:*:*:* | 1.5.21 | Vulnerable | Matio Project |
- cpe:2.3:a:matio_project:matio:1.5.20:*:*:*:*:*:*:* Versions 1.5.20 Vulnerable ·Matio Project
- cpe:2.3:a:matio_project:matio:1.5.21:*:*:*:*:*:*:* Versions 1.5.21 Vulnerable ·Matio Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-36977
- 2026-10-03 Alias added: GHSA-jc5x-q9q8-4xhc
References
Patch 2
More Matio Project Matio vulnerabilities
- TI-2025-02053 tbeu matio io.c strdup_vprintf heap-based overflow CVSS 4.0MEDIUM 5.3
- TI-2025-02052 tbeu matio mat.c Mat_VarPrint heap-based overflow CVSS 4.0MEDIUM 5.3
- TI-2019-09813 Multiple integer overflows exist in MATIO before 1.5.16, related to mat.c, mat4.c, mat5.c, mat73.c, and matvar_struct.c CVSS 3.1CRITICAL 9.8
- TI-2019-06522 An issue was discovered in libmatio.a in matio (aka MAT File I/O Library) 1.5.13. CVSS 3.0CRITICAL 9.1
- TI-2019-06520 An issue was discovered in libmatio.a in matio (aka MAT File I/O Library) 1.5.13. CVSS 3.0CRITICAL 9.1
- TI-2019-06518 An issue was discovered in libmatio.a in matio (aka MAT File I/O Library) 1.5.13. CVSS 3.0CRITICAL 9.1
Sources
- CVE-2021-36977 · CVE Program
- CVE-2021-36977 · NVD
- FIRST EPSS
- GHSA-jc5x-q9q8-4xhc · GitHub Advisory Database · CC BY 4.0
- CVE-2021-36977 · Red Hat security data · CC BY 4.0
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