CVE-2020-21677

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

A heap-based buffer overflow in the sixel_encoder_output_without_macro function in encoder.c of Libsixel 1.8.4 allows attackers to cause a denial of service (DOS) via converting a crafted PNG file into Sixel format.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-787

Affected software

VendorProductVersions
n/an/an/a

References

Timeline

Published
Aug 10, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2020

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CVE-2020-21677: Medium severity, CVSS 6.5 | Vulnix