CVE-2020-21049

6.5 MEDIUM
Published: September 14, 2021 Modified: April 24, 2026
View on NVD

Description

An invalid read in the stb_image.h component of libsixel prior to v1.8.5 allows attackers to cause a denial of service (DOS) via a crafted PSD file.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://bitbucket.org/netbsd/pkgsrc/commits/970a81d31ec7498e04d09b6b7771cef35f63cd28
Source: cve@mitre.org
Broken Link
https://github.com/saitoha/libsixel/blob/master/ChangeLog
Source: cve@mitre.org
Release Notes Third Party Advisory
https://github.com/saitoha/libsixel/commit/0b1e0b3f7b44233f84e5c9f512f8c90d6bbbe33d
Source: cve@mitre.org
Patch Release Notes Third Party Advisory
https://github.com/saitoha/libsixel/issues/74
Source: cve@mitre.org
Exploit Issue Tracking Patch Third Party Advisory
https://github.com/saitoha/libsixel/releases/tag/v1.8.5
Source: cve@mitre.org
Release Notes Third Party Advisory
https://bitbucket.org/netbsd/pkgsrc/commits/970a81d31ec7498e04d09b6b7771cef35f63cd28
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
https://github.com/saitoha/libsixel/blob/master/ChangeLog
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes Third Party Advisory
https://github.com/saitoha/libsixel/commit/0b1e0b3f7b44233f84e5c9f512f8c90d6bbbe33d
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Release Notes Third Party Advisory
https://github.com/saitoha/libsixel/issues/74
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Issue Tracking Patch Third Party Advisory
https://github.com/saitoha/libsixel/releases/tag/v1.8.5
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes Third Party Advisory

10 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.5 / 10.0
EPSS (Exploit Probability)
0.4%
61th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-125

Affected Vendors

saitoha

Related CVEs

CVE-2026-6175 N/A
CVE-2026-42171 7.8
CVE-2026-41488 3.1
CVE-2026-41481 6.5
CVE-2026-41478 9.9