FFmpeg before 8.1 has an integer overflow and resultant out-of-bounds write via CENC (Common Encryption) subsample data to libavformat/mov.c.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
FFMpeg FFMpeg unaffected
Version Status Constraints
4.1 affected < 8.1

No data.

No data.

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Project Subscriptions

Vendors Products
Ffmpeg Subscribe
Ffmpeg Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22348 cve-icon cve-icon
History

Thu, 16 Apr 2026 01:45:00 +0000

Type Values Removed Values Added
Description FFmpeg before 8.1 has an integer overflow and resultant out-of-bounds write via CENC (Common Encryption) subsample data to libavformat/mov.c.
First Time appeared Ffmpeg
Ffmpeg ffmpeg
Weaknesses CWE-190
CPEs cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
Vendors & Products Ffmpeg
Ffmpeg ffmpeg
References
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-04-16T01:42:34.200Z

Reserved: 2026-04-16T01:33:36.641Z

Link: CVE-2026-40962

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-04-16T02:16:12.227

Modified: 2026-04-16T02:16:12.227

Link: CVE-2026-40962

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses