High severity7.0NVD Advisory· Published Nov 9, 2026
CVE-2026-125202
CVE-2026-125202
Description
FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in vaapi_hevc_start_frame() in libavcodec/vaapi_hevc.c that copies unbounded PPS tile counts into fixed-size arrays. Attackers can supply a crafted HEVC bitstream with a large picture and many tiles to write controlled 16-bit values past heap-allocated hwaccel data, corrupting memory in applications decoding with VAAPI.
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Affected products
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Vulnerability mechanics
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