CVE-2020-20453 Denial of service in n/a

What is CVE-2020-20453?

CVE-2020-20453 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 25 May 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/aaccoder, which allows a remote malicious user to cause a Denial of Service

Weakness: CWE-369

Which versions are affected by CVE-2020-20453?

It affects 2 products.

Products include Debian Debian Linux, Ffmpeg Ffmpeg.

How do I fix CVE-2020-20453?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-20453 being exploited?

There is no known exploitation of CVE-2020-20453 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-2024-LH94122, DEBIAN-CVE-2020-20453, GHSA-934g-qjpp-c7xg, UBUNTU-CVE-2020-20453.