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.
Advisories

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Fixes

Solution

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Workaround

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History

Thu, 08 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
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.
Title FFmpeg through 9.0.2 Stack Exhaustion via Recursive Free of pssh Boxes
First Time appeared Ffmpeg
Ffmpeg ffmpeg
Weaknesses CWE-674
CPEs cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
Vendors & Products Ffmpeg
Ffmpeg ffmpeg
References
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 5.7, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-08T17:51:49.706Z

Reserved: 2026-10-08T15:11:28.450Z

Link: CVE-2026-107678

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-08T16:17:05.747

Modified: 2026-10-08T16:17:05.747

Link: CVE-2026-107678

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses