Vulnerability Database

313,825

Total vulnerabilities in the database

CVE-2020-21688

A heap-use-after-free in the av_freep function in libavutil/mem.c of FFmpeg 4.2 allows attackers to execute arbitrary code.

  • Published: Aug 10, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2020-21688
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 8.8
  • AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: Medium
  • Score: 6.8
  • AV:N/AC:M/Au:N/C:P/I:P/A:P

CWEs:

Software From Fixed in
ffmpeg / ffmpeg 4.2 4.2.x
debian / debian_linux 11.0 11.0.x