CVE-2021-32273 Memory corruption in n/a

What is CVE-2021-32273?

CVE-2021-32273 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 20 Sep 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

An issue was discovered in faad2 through 2.10.0. A stack-buffer-overflow exists in the function ftypin located in mp4read.c. It allows an attacker to cause Code Execution.

Weakness: CWE-787

Which versions are affected by CVE-2021-32273?

It affects 2 products.

Products include Debian Debian Linux, Faad2 Project Faad2.

How do I fix CVE-2021-32273?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-32273 being exploited?

There is no known exploitation of CVE-2021-32273 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLEANSTART-2023-ZC86783, DEBIAN-CVE-2021-32273, GHSA-pgjp-28w5-m45g, UBUNTU-CVE-2021-32273.