PT-2021-4535 · FFmpeg+5 · Ffmpeg+5

Published 2019-02-21 · Updated 2026-02-06 · CVE-2020-21041

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions FFmpeg version 4.1

Description The issue is related to a buffer overflow in the apng do inverse blend component of the Ffmpeg library, which could allow a remote attacker to cause a Denial of Service.

Recommendations For FFmpeg version 4.1, consider disabling the apng do inverse blend function in libavcodec/pngenc.c to prevent exploitation until a patch is available.

Exploit

Fix

DoS

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

ALT-PU-2019-1275

ALT-PU-2023-4100

ALT-PU-2023-4117

BDU:2021-05190

CLEANSTART-2026-EZ98723

CLEANSTART-2026-PS82605

CLEANSTART-2026-XE32069

CVE-2020-21041

DLA-2742-1

DSA-4990-1

MGASA-2021-0495

OPENSUSE-SU-2021:2322-1

OPENSUSE-SU-2021_2322-1

SUSE-SU-2021:2322-1

SUSE-SU-2021:2929-1

USN-5167-1

USN-5472-1

Affected Products

Alt Linux

Astra Linux

Ffmpeg

Linuxmint

Suse

Ubuntu

References · 268

• 🔥 https://trac.ffmpeg.org/ticket/7989 · Exploit
• https://osv.dev/vulnerability/CVE-2020-21041 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:2322-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-22022 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-22036 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-22017 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-24020 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-30123 · Security Note
• https://osv.dev/vulnerability/USN-5472-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-20453 · Security Note
• https://ubuntu.com/security/CVE-2020-22044 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-13302 · Security Note
• https://ubuntu.com/security/CVE-2020-21688 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-38291 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-22025 · Vendor Advisory