What is CVE-2019-20052?

CVE-2019-20052 is a medium-severity vulnerability in Matio Project, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2019-12-27.

How severe is CVE-2019-20052?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Matio Project

CVE-2019-20052

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.

Published 2019-12-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Matio Project — versions 1.5.17

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

github.com/tbeu/matio/issues/131 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2019-20052?: CVE-2019-20052 is a medium-severity vulnerability in Matio Project, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2019-12-27.
How severe is CVE-2019-20052?: Medium severity. CVSS v3 base score is 6.5 out of 10.