# CVE-2026-88914: gst-plugins-good1.0: A flaw was found in GStreamer's gst-plugins-good isomp4 plugin

CVE-2026-88914 is fixed in 12 products on 1 platform, first by gstreamer1.0-gtk3 1.28.2-2ubuntu0.4, released September 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-88914
- Priority: Routine
- CVSS: 4.4 (medium)
- EPSS: 0.0012
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 10, 2026

## Description

A flaw was found in GStreamer's gst-plugins-good isomp4 plugin. When processing a specially crafted MP4 or MOV file containing CEA-608 closed-caption data, an integer overflow in 32-bit unsigned arithmetic can bypass a bounds check in the caption parser. This leads to an out-of-bounds heap read of up to 244 bytes, which is then included in the downstream caption output. An attacker could exploit this by tricking a user into opening a malicious media file, potentially resulting in disclosure of adjacent heap memory or application crash.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gst-plugins-good1.0 Debian 12.15 (bookworm) | 1.22.0-5+deb12u4 | [DEBIAN-CVE-2026-88914](https://patchblox.com/security/data/fix/linux/debian-cve-2026-88914.md) | Sep 14, 2026 |
| Linux | gst-plugins-good1.0 Debian 14 | 1.28.7-1 | [DEBIAN-CVE-2026-88914](https://patchblox.com/security/data/fix/linux/debian-cve-2026-88914.md) | Sep 14, 2026 |
| Linux | gstreamer1-plugins-good amzn 2023 | 1.24.10-1.amzn2023.0.11 | [ALAS2023-2026-3353](https://patchblox.com/security/data/fix/linux/alas2023-2026-3353.md) | Nov 7, 2026 |
| Linux | gstreamer1-plugins-good-debuginfo amzn 2023 | 1.24.10-1.amzn2023.0.11 | [ALAS2023-2026-3353](https://patchblox.com/security/data/fix/linux/alas2023-2026-3353.md) | Nov 7, 2026 |
| Linux | gstreamer1-plugins-good-debugsource amzn 2023 | 1.24.10-1.amzn2023.0.11 | [ALAS2023-2026-3353](https://patchblox.com/security/data/fix/linux/alas2023-2026-3353.md) | Nov 7, 2026 |
| Linux | gstreamer1-plugins-good-gtk amzn 2023 | 1.24.10-1.amzn2023.0.11 | [ALAS2023-2026-3353](https://patchblox.com/security/data/fix/linux/alas2023-2026-3353.md) | Nov 7, 2026 |
| Linux | gstreamer1-plugins-good-gtk-debuginfo amzn 2023 | 1.24.10-1.amzn2023.0.11 | [ALAS2023-2026-3353](https://patchblox.com/security/data/fix/linux/alas2023-2026-3353.md) | Nov 7, 2026 |
| Linux | gstreamer1.0-gtk3 Ubuntu 20.04 LTS (focal) | 1.16.3-0ubuntu1.3+esm4 | [gstreamer1.0-gtk3 1.16.3-0ubuntu1.3+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gstreamer1.0-gtk3-1.16.3-0ubuntu1.3-esm4.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-gtk3 Ubuntu 22.04.1 LTS (jammy) | 1.20.3-0ubuntu1.10 | [gstreamer1.0-gtk3 1.20.3-0ubuntu1.10](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gstreamer1.0-gtk3-1.20.3-0ubuntu1.10.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-gtk3 Ubuntu 24.04.5 LTS (noble) | 1.24.2-1ubuntu1.8 | [gstreamer1.0-gtk3 1.24.2-1ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gstreamer1.0-gtk3-1.24.2-1ubuntu1.8.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-gtk3 Ubuntu 26.04.1 LTS (resolute) | 1.28.2-2ubuntu0.4 | [gstreamer1.0-gtk3 1.28.2-2ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gstreamer1.0-gtk3-1.28.2-2ubuntu0.4.md) | Sep 10, 2026 |
| Linux | gstreamer1.0-plugins-good Ubuntu 20.04 LTS (focal) | 1.16.3-0ubuntu1.3+esm4 | [gstreamer1.0-plugins-good 1.16.3-0ubuntu1.3+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gstreamer1.0-plugins-good-1.16.3-0ubuntu1.3-esm4.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-plugins-good Ubuntu 22.04.1 LTS (jammy) | 1.20.3-0ubuntu1.10 | [gstreamer1.0-plugins-good 1.20.3-0ubuntu1.10](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gstreamer1.0-plugins-good-1.20.3-0ubuntu1.10.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-plugins-good Ubuntu 24.04.5 LTS (noble) | 1.24.2-1ubuntu1.8 | [gstreamer1.0-plugins-good 1.24.2-1ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gstreamer1.0-plugins-good-1.24.2-1ubuntu1.8.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-plugins-good Ubuntu 26.04.1 LTS (resolute) | 1.28.2-2ubuntu0.4 | [gstreamer1.0-plugins-good 1.28.2-2ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gstreamer1.0-plugins-good-1.28.2-2ubuntu0.4.md) | Sep 10, 2026 |
| Linux | gstreamer1.0-pulseaudio Ubuntu 20.04 LTS (focal) | 1.16.3-0ubuntu1.3+esm4 | [gstreamer1.0-pulseaudio 1.16.3-0ubuntu1.3+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gstreamer1.0-pulseaudio-1.16.3-0ubuntu1.3-esm4.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-pulseaudio Ubuntu 22.04.1 LTS (jammy) | 1.20.3-0ubuntu1.10 | [gstreamer1.0-pulseaudio 1.20.3-0ubuntu1.10](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gstreamer1.0-pulseaudio-1.20.3-0ubuntu1.10.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-pulseaudio Ubuntu 24.04.5 LTS (noble) | 1.24.2-1ubuntu1.8 | [gstreamer1.0-pulseaudio 1.24.2-1ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gstreamer1.0-pulseaudio-1.24.2-1ubuntu1.8.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-pulseaudio Ubuntu 26.04.1 LTS (resolute) | 1.28.2-2ubuntu0.4 | [gstreamer1.0-pulseaudio 1.28.2-2ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gstreamer1.0-pulseaudio-1.28.2-2ubuntu0.4.md) | Sep 10, 2026 |
| Linux | gstreamer1.0-qt5 Ubuntu 20.04 LTS (focal) | 1.16.3-0ubuntu1.3+esm4 | [gstreamer1.0-qt5 1.16.3-0ubuntu1.3+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gstreamer1.0-qt5-1.16.3-0ubuntu1.3-esm4.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-qt5 Ubuntu 22.04.1 LTS (jammy) | 1.20.3-0ubuntu1.10 | [gstreamer1.0-qt5 1.20.3-0ubuntu1.10](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gstreamer1.0-qt5-1.20.3-0ubuntu1.10.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-qt5 Ubuntu 24.04.5 LTS (noble) | 1.24.2-1ubuntu1.8 | [gstreamer1.0-qt5 1.24.2-1ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gstreamer1.0-qt5-1.24.2-1ubuntu1.8.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-qt5 Ubuntu 26.04.1 LTS (resolute) | 1.28.2-2ubuntu0.4 | [gstreamer1.0-qt5 1.28.2-2ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gstreamer1.0-qt5-1.28.2-2ubuntu0.4.md) | Sep 10, 2026 |
| Linux | gstreamer1.0-qt6 Ubuntu 24.04.5 LTS (noble) | 1.24.2-1ubuntu1.8 | [gstreamer1.0-qt6 1.24.2-1ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gstreamer1.0-qt6-1.24.2-1ubuntu1.8.md) | Oct 2, 2026 |
| Linux | gstreamer1.0-qt6 Ubuntu 26.04.1 LTS (resolute) | 1.28.2-2ubuntu0.4 | [gstreamer1.0-qt6 1.28.2-2ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gstreamer1.0-qt6-1.28.2-2ubuntu0.4.md) | Sep 10, 2026 |
| Linux | libgstreamer-plugins-good1.0-0 Ubuntu 20.04 LTS (focal) | 1.16.3-0ubuntu1.3+esm4 | [libgstreamer-plugins-good1.0-0 1.16.3-0ubuntu1.3+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgstreamer-plugins-good1.0-0-1.16.3-0ubuntu1.3-esm4.md) | Oct 2, 2026 |
| Linux | libgstreamer-plugins-good1.0-0 Ubuntu 22.04.1 LTS (jammy) | 1.20.3-0ubuntu1.10 | [libgstreamer-plugins-good1.0-0 1.20.3-0ubuntu1.10](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libgstreamer-plugins-good1.0-0-1.20.3-0ubuntu1.10.md) | Oct 2, 2026 |
| Linux | libgstreamer-plugins-good1.0-0 Ubuntu 24.04.5 LTS (noble) | 1.24.2-1ubuntu1.8 | [libgstreamer-plugins-good1.0-0 1.24.2-1ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libgstreamer-plugins-good1.0-0-1.24.2-1ubuntu1.8.md) | Oct 2, 2026 |

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Data as of 2026-11-08T13:06:02Z 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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