CVE-2019-20023

MEDIUMNVD 6.56.5—

6.5

A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4.

CVSS v3: 6.5
EG Score: 6.5(medium)
EPSS: 63.4%
KEV: Not listed

Published

December 27, 2019

Last Modified

April 24, 2026

References (2)

cve@mitrehttps://github.com/saitoha/libsixel/issues/120
af854a3a-2127-422b-91ae-364da2661108https://github.com/saitoha/libsixel/issues/120

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-401Missing Release of Memory after Effective Lifetime (Memory Leak)

Data Freshness Timeline

(refreshed 10× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
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Frequently asked(5)

What is CVE-2019-20023?

CVE-2019-20023 is a medium vulnerability published on December 27, 2019. A memory leak was discovered in imagebufferresize in fromsixel.c in libsixel 1.8.4.

When was CVE-2019-20023 disclosed?

CVE-2019-20023 was first published in the National Vulnerability Database on December 27, 2019, with the most recent update on April 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-20023 actively exploited?

CVE-2019-20023 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 63.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-20023?

CVE-2019-20023 has a CVSS v3 base score of 6.5 (NVD).

How do I remediate CVE-2019-20023?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-20023, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2019-20023

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-20023?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)