CVE-2022-48434

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).

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Name	Vendor	Start Version	End Version
Ffmpeg	Ffmpeg	*	5.1.2 (excluding)
Ffmpeg	Ubuntu	bionic	*
Ffmpeg	Ubuntu	esm-apps/bionic	*
Ffmpeg	Ubuntu	esm-apps/focal	*
Ffmpeg	Ubuntu	esm-apps/jammy	*
Ffmpeg	Ubuntu	esm-apps/xenial	*
Ffmpeg	Ubuntu	focal	*
Ffmpeg	Ubuntu	jammy	*
Ffmpeg	Ubuntu	kinetic	*
Ffmpeg	Ubuntu	trusty	*
Ffmpeg	Ubuntu	upstream	*
Ffmpeg	Ubuntu	xenial	*

NVD	https://nvd.nist.gov/vuln/detail/CVE-2022-48434
CWE	https://cwe.mitre.org/data/definitions/416.html

Use After Free

Weakness

Affected Software

Potential Mitigations

References