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FFmpeg versions from 3.0 up to, but not including, 9.0 contain an uninitialized heap memory read vulnerability in the native RSCC decoder (libavcodec/rscc.c) that allows attackers to disclose heap me…

Medium CVSS 5.5
CVECVE-2026-70629
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 3.0 up to, but not including, 9.0 contain an uninitialized heap memory read vulnerability in the native RSCC decoder (libavcodec/rscc.c) that allows attackers to disclose heap memory contents by supplying a crafted video file with a compressed tile that decompresses fewer bytes than the declared tile geometry requires. When rscc_decode_frame() calls av_image_copy_plane() without validating the decompressed byte count against the tile dimensions, the unwritten suffix of the …

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/533a6198505edd1379e1cd722852350ae4a85acc
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/a5fe21a1a410a680fe93c33b0dd696b7e1c3aea4
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/cd1f545cf27ba08f6f5b31b1e92665d7874d4fd7
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23895

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD