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NVD / CVE Program· CNA mitre

CVE-2020-36428: matio (aka MAT File I/O Library) 1.5.18 through 1.5.21 has a heap-based buffer overflow in ReadInt32DataDouble (called from ReadInt32Data…

HighCVSS 8.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.3% (FIRST EPSS); higher than 72.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: libmatio (Debian:12) 1.5.22-1; matio (openSUSE:Leap 15.4) 1.5.23-bp154.2.3.1; matio (openSUSE:Tumbleweed) 1.5.23-1.1.

Low priority for now. Upgrade to libmatio (Debian:12) 1.5.22-1; matio (openSUSE:Leap 15.4) 1.5.23-bp154.2.3.1; matio (openSUSE:Tumbleweed) 1.5.23-1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

matio (aka MAT File I/O Library) 1.5.18 through 1.5.21 has a heap-based buffer overflow in ReadInt32DataDouble (called from ReadInt32Data and Mat_VarRead4).

Published
Jul 20, 2021
Updated
Jun 16, 2026
EPSS
1.3% · 72th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.3%

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
matio projectmatio

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • matio project matio1.5.18 and later · up to 1.5.21 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12libmatiobefore 1.5.22-11.5.22-1
openSUSE:Leap 15.4matiobefore 1.5.23-bp154.2.3.11.5.23-bp154.2.3.1
openSUSE:Tumbleweedmatiobefore 1.5.23-1.11.5.23-1.1
SUSE:Package Hub 15 SP4matiobefore 1.5.23-bp154.2.3.11.5.23-bp154.2.3.1

Same product

matio project: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-13107Multiple integer overflows exist in MATIO before 1.5.16, related to mat.c, mat4.c, mat5.c, mat73.c, and matvar_struct.c
    40Plan
  • CVE-2019-9037An issue was discovered in libmatio.a in matio (aka MAT File I/O Library) 1.5.13.
    37Monitor
  • CVE-2019-9035An issue was discovered in libmatio.a in matio (aka MAT File I/O Library) 1.5.13.
    37Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2019-20020Dec 26, 2019 · A stack-based buffer over-read was discovered in ReadNextStructField in mat5.c in matio 1.5.17.
    26Monitor
  • ← EarlierCVE-2019-20052Dec 27, 2019 · A memory leak was discovered in Mat_VarCalloc in mat.c in matio 1.5.17 because SafeMulDims does not consider the rank==0 case.
    26Monitor
  • Later →CVE-2021-36977Jul 20, 2021 · 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…
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:libmatio1.5.22-1 · Debian:12Package registry (OSV)
opensuse:matio1.5.23-bp154.2.3.1 · openSUSE:Leap 15.4Package registry (OSV)
suse:matio1.5.23-bp154.2.3.1 · SUSE:Package Hub 15 SP4Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records