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CVE-2026-75141high8.5

FFmpeg Heap Buffer Overflow in hvcC Box Writer via HEVC Muxing

Impact

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.

Source excerpt · VulnCheck

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

FFmpeg · FFmpeg

Other versions: unaffected

Version / rangeSource status
0 to before acf5d7cdc1f9ae8752c23e1ea8d7f355ed780781affected
VulnCheck version evidence

Original source 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.

References