High severity7.8NVD Advisory· Published Nov 9, 2026
CVE-2026-125233
CVE-2026-125233
Description
FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in dvbsub_encode() in libavcodec/dvbsubenc.c that undercounts each CLUT segment header by two bytes. Attackers can supply a file with many bitmap subtitle rectangles that, when transcoded to the dvbsub encoder, writes past the output buffer and corrupts heap memory.
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Affected products
1Patches
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