CVE-2026-12706 – Ffmpeg: ffmpeg: heap use-after-free read in rasc decoder decode_move()

CVE ID :CVE-2026-12706

Published : June 19, 2026, 10:55 a.m. | 48 minutes ago

Description :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).

Severity: 6.5 | MEDIUM

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