CVE-2020-35964 Memory corruption in n/a
An out-of-bounds write in FFmpeg's Vividas demuxer allows attackers to execute arbitrary code or cause a denial of service via crafted media files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-35964?
CVE-2020-35964 is a medium-severity memory corruption vulnerability in Ffmpeg Ffmpeg, published on 3 Jan 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-bounds write because of incorrect extradata packing.
Weakness: CWE-787
Which versions are affected by CVE-2020-35964?
It affects 1 product.
Products include Ffmpeg Ffmpeg.
How do I fix CVE-2020-35964?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-35964 being exploited?
There is no known exploitation of CVE-2020-35964 in the wild and no public exploit code.
Other vulnerabilities in Ffmpeg Ffmpeg
Sources
Also known as CLEANSTART-2024-SE31335, DEBIAN-CVE-2020-35964, GHSA-rhcr-x3w4-7v5m, JLSEC-2025-110, UBUNTU-CVE-2020-35964.