CVE-2019-20024

Name: CVE-2019-20024
Creator: NVD / NIST
Published: 2019-12-27T02:15:11+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.00%

Last modified Jun 17, 2026

CVE-2019-20024 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.. EPSS estimates a 1.00% chance of exploitation in the next 30 days.

Description

A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.00%

58.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Saitoha	Libsixel	< 1.8.4

References

https://github.com/saitoha/libsixel/issues/121Exploit, Issue Tracking, Third Party Advisory
https://github.com/saitoha/libsixel/issues/121Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Dec 27, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-20024?

A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.

How severe is CVE-2019-20024?

CVE-2019-20024 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.00% probability of exploitation in the next 30 days.

How do I fix CVE-2019-20024?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-20024?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST