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FFmpeg versions from 4.4 up to, but not including, 9.0 contain an out-of-bounds heap write vulnerability in the native GoPro CineForm HD (CFHD) decoder that allows remote attackers to corrupt heap me…

High CVSS 7.8
CVECVE-2026-70632
First seen2026-08-07 00:15 UTC
Disclosed2026-08-06 22:18 UTC
Last updated2026-08-07 00:15 UTC
Channel statusauto

Summary

FFmpeg versions from 4.4 up to, but not including, 9.0 contain an out-of-bounds heap write vulnerability in the native GoPro CineForm HD (CFHD) decoder that allows remote attackers to corrupt heap memory by supplying a crafted AVI file during stream probing. The cfhd_decode() function fails to enforce the non-Bayer logical output-width invariant in the transform-type-2 reconstruction path, causing horiz_filter_clip() to write oversized 16-bit sample rows far beyond the allocated output frame bu…

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Lint boundary warnings (4)

The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).

  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/1006a2151236f9235bf02822f263b3fb0532111e
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/16b2049d4d5222db6cd7c031409058571c94f6a9
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/db05df9d135fb56a4babb836d5e9f5c1d984e087
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23898

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD