# CVE-2021-3498: gstreamer1.0-gtk3: GStreamer before 1.18.4 might cause heap corruption when parsing certain malformed Matroska files.

CVE-2021-3498 is fixed in 5 products on 1 platform, first by gstreamer1.0-gtk3 1.14.5-0ubuntu1~18.04.2, released April 19, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-3498
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0176
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 19, 2021

## Description

GStreamer before 1.18.4 might cause heap corruption when parsing certain malformed Matroska files.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gstreamer1.0-gtk3 Ubuntu 18.04.6 LTS (bionic) | 1.14.5-0ubuntu1~18.04.2 | [gstreamer1.0-gtk3 1.14.5-0ubuntu1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-gstreamer1.0-gtk3-1.14.5-0ubuntu1-18.04.2.md) | Apr 19, 2021 |
| Linux | gstreamer1.0-gtk3 Ubuntu 20.04 LTS (focal) | 1.16.2-1ubuntu2.1 | [gstreamer1.0-gtk3 1.16.2-1ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gstreamer1.0-gtk3-1.16.2-1ubuntu2.1.md) | Apr 19, 2021 |
| Linux | gstreamer1.0-plugins-good Ubuntu 18.04.6 LTS (bionic) | 1.14.5-0ubuntu1~18.04.2 | [gstreamer1.0-plugins-good 1.14.5-0ubuntu1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-gstreamer1.0-plugins-good-1.14.5-0ubuntu1-18.04.2.md) | Apr 19, 2021 |
| Linux | gstreamer1.0-plugins-good Ubuntu 20.04 LTS (focal) | 1.16.2-1ubuntu2.1 | [gstreamer1.0-plugins-good 1.16.2-1ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gstreamer1.0-plugins-good-1.16.2-1ubuntu2.1.md) | Apr 19, 2021 |
| Linux | gstreamer1.0-pulseaudio Ubuntu 18.04.6 LTS (bionic) | 1.14.5-0ubuntu1~18.04.2 | [gstreamer1.0-pulseaudio 1.14.5-0ubuntu1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-gstreamer1.0-pulseaudio-1.14.5-0ubuntu1-18.04.2.md) | Apr 19, 2021 |
| Linux | gstreamer1.0-pulseaudio Ubuntu 20.04 LTS (focal) | 1.16.2-1ubuntu2.1 | [gstreamer1.0-pulseaudio 1.16.2-1ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gstreamer1.0-pulseaudio-1.16.2-1ubuntu2.1.md) | Apr 19, 2021 |
| Linux | gstreamer1.0-qt5 Ubuntu 18.04.6 LTS (bionic) | 1.14.5-0ubuntu1~18.04.2 | [gstreamer1.0-qt5 1.14.5-0ubuntu1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-gstreamer1.0-qt5-1.14.5-0ubuntu1-18.04.2.md) | Apr 19, 2021 |
| Linux | gstreamer1.0-qt5 Ubuntu 20.04 LTS (focal) | 1.16.2-1ubuntu2.1 | [gstreamer1.0-qt5 1.16.2-1ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gstreamer1.0-qt5-1.16.2-1ubuntu2.1.md) | Apr 19, 2021 |
| Linux | libgstreamer-plugins-good1.0-0 Ubuntu 18.04.6 LTS (bionic) | 1.14.5-0ubuntu1~18.04.2 | [libgstreamer-plugins-good1.0-0 1.14.5-0ubuntu1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgstreamer-plugins-good1.0-0-1.14.5-0ubuntu1-18.04.2.md) | Apr 19, 2021 |
| Linux | libgstreamer-plugins-good1.0-0 Ubuntu 20.04 LTS (focal) | 1.16.2-1ubuntu2.1 | [libgstreamer-plugins-good1.0-0 1.16.2-1ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgstreamer-plugins-good1.0-0-1.16.2-1ubuntu2.1.md) | Apr 19, 2021 |

---

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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.