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Vulnerabilities CVE-2026-75141

CVE-2026-75141

High
Open
TLP:CLEAR

FFmpeg Heap Buffer Overflow in hvcC Box Writer via HEVC Muxing

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Description

FFmpeg before commit acf5d7c contains a heap buffer overflow in the hvcC box writer. When writing an HEVC configuration record with more NAL units of a single type than the count field can represent, the NAL unit count overflows, causing a heap buffer overflow. A crafted HEVC input file triggers the overflow during muxing.

Details

CVSS Score
8.5
CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Confidence
90%
Published
Aug 19, 2026
Last Modified
Aug 20, 2026
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