# CVE-2021-25802: VLC media player: A buffer overflow vulnerability in the AVI_ExtractSubtitle component of VideoLAN VLC Media Player 3.0.11…

CVE-2021-25802 is fixed in 21 products on 2 platforms, first by VLC media player 3.0.12, released May 10, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-25802
- Priority: High
- CVSS: 7.1 (Medium)
- EPSS: 0.0074
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 26, 2021
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-25802

## Description

A buffer overflow vulnerability in the AVI_ExtractSubtitle component of VideoLAN VLC Media Player 3.0.11 allows attackers to cause an out-of-bounds read via a crafted .avi file.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | VLC media player | 3.0.12 | [VLC media player 3.0.12](https://patchblox.com/security/data/fix/windows-app/videolan.vlc-3.0.12.md) | May 10, 2021 |
| Linux | libvlc-bin Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [libvlc-bin 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvlc-bin-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | libvlc-bin Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [libvlc-bin 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libvlc-bin-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | libvlc5 Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [libvlc5 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvlc5-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | libvlc5 Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [libvlc5 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libvlc5-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | libvlccore9 Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [libvlccore9 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvlccore9-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | libvlccore9 Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [libvlccore9 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libvlccore9-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-bin Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-bin 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-bin-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-bin Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-bin 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-bin-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-data Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-data 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-data-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-data Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-data 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-data-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-l10n Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-l10n 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-l10n-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-l10n Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-l10n 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-l10n-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-access-extra Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-access-extra 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-access-extra-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-access-extra Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-plugin-access-extra 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-plugin-access-extra-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-base Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-base 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-base-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-base Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-plugin-base 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-plugin-base-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-fluidsynth Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-fluidsynth 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-fluidsynth-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-fluidsynth Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-plugin-fluidsynth 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-plugin-fluidsynth-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-jack Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-jack 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-jack-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-jack Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-plugin-jack 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-plugin-jack-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-notify Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-notify 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-notify-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-notify Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-plugin-notify 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-plugin-notify-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-qt Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-qt 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-qt-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-qt Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-plugin-qt 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-plugin-qt-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-samba Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-samba 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-samba-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-samba Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-plugin-samba 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-plugin-samba-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-skins2 Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-skins2 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-skins2-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-skins2 Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-plugin-skins2 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-plugin-skins2-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-svg Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-svg 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-svg-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-svg Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-plugin-svg 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-plugin-svg-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-video-output Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-video-output 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-video-output-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-video-output Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-plugin-video-output 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-plugin-video-output-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-video-splitter Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-video-splitter 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-video-splitter-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-video-splitter Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-plugin-video-splitter 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-plugin-video-splitter-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-visualization Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-visualization 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-visualization-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-visualization Ubuntu 20.04 LTS (focal) | 3.0.9.2-1ubuntu0.1~esm1 | [vlc-plugin-visualization 3.0.9.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vlc-plugin-visualization-3.0.9.2-1ubuntu0.1-esm1.md) | Dec 6, 2022 |
| Linux | vlc-plugin-zvbi Ubuntu 18.04.6 LTS (bionic) | 3.0.8-0ubuntu18.04.1+esm1 | [vlc-plugin-zvbi 3.0.8-0ubuntu18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-zvbi-3.0.8-0ubuntu18.04.1-esm1.md) | Dec 6, 2022 |

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