# CVE-2026-52296: ffmpeg: FFmpeg before 9.0 has an out-of-bounds read because of missing required padding in WMA extradata allocation paths in...

CVE-2026-52296 is fixed in ffmpeg on 1 platform, first by DEBIAN-CVE-2026-52296, released September 17, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-52296
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 13, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ffmpeg Debian 13.5 (trixie) | 7:7.1.5-0+deb13u1 | [DEBIAN-CVE-2026-52296](https://patchblox.com/security/data/fix/linux/debian-cve-2026-52296.md) | Sep 17, 2026 |
| Linux | ffmpeg Debian 14 | 7:8.1.1-1 | [DEBIAN-CVE-2026-52296](https://patchblox.com/security/data/fix/linux/debian-cve-2026-52296.md) | Sep 17, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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