HOMEVULNERABILITIESCVE-2021-36977
MEDIUM

CVE-2021-36977

CWE-787Published: July 20, 2021· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-36977 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected Vendors & Products

matio_project1 product(s)
matio
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

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

All References (10)

→
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31265Patch · Third Party Advisory
→
https://github.com/HDFGroup/hdf5/issues/272Issue Tracking · Third Party Advisory
→
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/matio/OSV-2021-440.yamlThird Party Advisory
→
https://github.com/google/oss-fuzz-vulns/commit/37b781ace1b4228fc36483bb7e30c72ea9d4c3d6Issue Tracking · Patch · Third Party Advisory
→
https://github.com/google/oss-fuzz/issues/4999Issue Tracking · Third Party Advisory
→
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31265Patch · Third Party Advisory
→
https://github.com/HDFGroup/hdf5/issues/272Issue Tracking · Third Party Advisory
→
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/matio/OSV-2021-440.yamlThird Party Advisory
→
https://github.com/google/oss-fuzz-vulns/commit/37b781ace1b4228fc36483bb7e30c72ea9d4c3d6Issue Tracking · Patch · Third Party Advisory
→
https://github.com/google/oss-fuzz/issues/4999Issue Tracking · Third Party Advisory

Quick Facts

CVE IDCVE-2021-36977
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-787
CISA KEVNo
Affected1 vendor(s)
PublishedJul 20, 2021

Related CVEs (CWE-787)

CVE-2015-5096
10.0
CVE-2015-5098
10.0
CVE-2011-1807
10.0
CVE-2015-5105
10.0
CVE-2013-5610
10.0
CVE-2018-2913
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-36977 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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