CVE-2026-107678
Description
FFmpeg through 9.0.2 contains a stack exhaustion vulnerability in av_encryption_init_info_free() in libavutil/encryption_info.c, which recursively frees AVEncryptionInitInfo linked lists built by the MOV demuxer's mov_read_pssh(). Attackers can supply a crafted MP4 file with tens of thousands of small pssh boxes to exhaust the stack and crash the process, while also causing quadratic CPU consumption.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24593
- https://ffmpeg.org/
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavformat/mov.c#L8070
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavutil/encryption_info.c#L219-L231
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-stack-exhaustion-via-recursive-free-of-pssh-boxes
CWEs
CWE-674
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.