PT-2021-21584 · Mupdf+3 · Mupdf+3

Xuwei Liu · Published 2021-07-21 · Updated 2025-10-16 · CVE-2021-37220

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions MuPDF versions prior to 1.18.2

Description The issue arises from an out-of-bounds write in the cached color converter, which fails to properly consider the maximum key size of a hash table. This can be observed with crafted "mutool draw" input.

Recommendations For MuPDF versions prior to 1.18.2, update to version 1.18.2 or later to resolve the issue.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALT-PU-2024-17298

ALT-PU-2024-17458

ALT-PU-2025-1462

ALT-PU-2025-5278

CVE-2021-37220

USN-7825-1

Affected Products

Alt Linux

Linuxmint

Mupdf

Ubuntu

References · 22

• 🔥 https://bugs.ghostscript.com/show_bug.cgi?id=703791 · Exploit
• https://ubuntu.com/security/CVE-2018-16647 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-37220 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-37220 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-10289 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-21896 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-37220 · Vendor Advisory
• https://osv.dev/vulnerability/USN-7825-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-26683 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3407 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-37220 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-37220 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-37220 · Security Note
• https://ubuntu.com/security/CVE-2018-16648 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-7825-1 · Vendor Advisory