CVE-2022-48434

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-03-29 · updated 2026-06-17
Weakness: CWE-416

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).

Affected products

FFmpeg: before 5.1.2 — fixed in 5.1.2

How to fix

Upgrade to a fixed version: FFmpeg 5.1.2. Check the vendor advisory for mitigations.

References

https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/cc867f2c09d2b69cee8a0eccd62aff002cbbfe11
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KOMB6WRUC55VWV25IKJTV22KARBUGWGQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PQHNSWXFUN3VJ3AO2AEJUK3BURSGM5G2/
https://news.ycombinator.com/item?id=35356201
https://security.gentoo.org/glsa/202312-14
https://wrv.github.io/h26forge.pdf
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/cc867f2c09d2b69cee8a0eccd62aff002cbbfe11
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KOMB6WRUC55VWV25IKJTV22KARBUGWGQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PQHNSWXFUN3VJ3AO2AEJUK3BURSGM5G2/
https://news.ycombinator.com/item?id=35356201
https://security.gentoo.org/glsa/202312-14
https://wrv.github.io/h26forge.pdf

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