CVE-2026-107678
Medium
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.
SeverityMedium
CVSS4.7
Exploit probability—
ProductFfmpeg
PublishedOct 8, 2026
First seenOct 8, 2026
Weakness typeCWE-674CWE-674
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ffmpeg ffmpeg | v ≤ 9.0.2 | — |
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