CVE-2026-52296

Received Received - Intake

Out-of-Bounds Read in FFmpeg Before Version 9.0

Publication date: 2026-09-13

Last updated on: 2026-09-13

Assigner: MITRE

Description

FFmpeg before 9.0 has an out-of-bounds read because of missing required padding in WMA extradata allocation paths in libavcodec/wmaenc.c.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-13

Last Modified

2026-09-13

Generated

2026-09-14

AI Q&A

2026-09-14

EPSS Evaluated

N/A

NVD

CVE-2026-52296

EUVD

EUVD-2026-77125

Affected Vendors & Products

Vendor	Product	Version / Range
ffmpeg	ffmpeg	to 9.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds read issue in FFmpeg versions before 9.0. It occurs due to missing required padding in WMA extradata allocation paths within the libavcodec/wmaenc.c file. This flaw could allow an attacker to read memory outside the intended buffer.

Detection Guidance

This vulnerability is specific to FFmpeg versions before 9.0 and involves an out-of-bounds read due to missing padding in WMA extradata allocation. Detection requires checking the installed FFmpeg version. Use 'ffmpeg -version' to verify if your version is below 9.0.

Impact Analysis

The impact is limited as the vulnerability has a low severity score (CVSS v3.1 base score of 2.9). It may cause application crashes or unexpected behavior when processing WMA audio files, but it does not lead to code execution or data leaks.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it is an out-of-bounds read issue in FFmpeg's WMA handling. Compliance risks would depend on how the affected software is used in systems processing sensitive data.

Mitigation Strategies

Upgrade FFmpeg to version 9.0 or later immediately. If upgrading is not possible, avoid processing WMA audio files until the update is applied. Monitor vendor advisories for patches.

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