FFmpeg before 8.1 has an integer overflow and resultant out-of-bounds write via CENC (Common Encryption) subsample data to libavformat/mov.c.
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"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-40962",
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"id": "CVE-2026-40962"
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