A use-after-free vulnerability was found in FFmpeg's RASC video decoder. The decode_move() function initializes a read pointer into a decompressed buffer, but a subsequent reallocation of that same buffer during move-table processing leaves the pointer dangling. An attacker could exploit this by providing a specially crafted AVI file containing a malicious RASC video stream. When a user opens or plays the file, the decoder reads from freed heap memory, which could lead to a denial of service (crash).

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE-416

https://access.redhat.com/security/cve/CVE-2026-12706

https://bugzilla.redhat.com/show_bug.cgi?id=2490710

https://lists.ffmpeg.org/archives/list/[email protected]/message/TTRIJZA7UL6KJTEDMMBGZPLLJERJ3EFX/

https://patchwork.ffmpeg.org/project/ffmpeg/patch/177766314111.63.10674887811034989327@29965ddac10e/

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