CVE-2022-48434 Information

Description

libavcodec/pthread_frame.c in FFmpeg before 5.1.2 as used in VLC and other products leaves stale hwaccel state in worker threads which allows attackers to trigger a use-after-free and execute arbitrary code in some circumstances (e.g. hardware re-initialization upon a mid-video SPS change when Direct3D11 is used).

Reference

https://wrv.github.io/h26forge.pdf https://news.ycombinator.com/item?id=35356201 https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/cc867f2c09d2b69cee8a0eccd62aff002cbbfe11