CVE-2020-20902: Ffmpeg

Medium severity, CVSS 6.5. EPSS: 1.2% chance of exploitation in the next 30 days.

A CWE-125: Out-of-bounds read vulnerability exists in long_term_filter function in g729postfilter.c in FFmpeg 4.2.1 during computation of the denominator of pseudo-normalized correlation R'(0), that could result in disclosure of information.

Affected products

• Ffmpeg Ffmpeg: version 4.2.1 only

Published 2021-09-20. Last modified 2026-06-17.