# CVE-2026-86476: gstreamer1-plugins-base: A flaw was found in gst-plugins-base

CVE-2026-86476 is fixed in 6 products on 1 platform, first by ALAS2023-2026-3397, released November 10, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-86476
- Priority: High
- CVSS: n/a (important)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 9, 2026

## Description

A flaw was found in gst-plugins-base. A heap buffer overflow can be triggered when processing video buffers whose attached GstVideoMeta metadata declares plane strides and offsets that exceed the actual backing memory allocation. The metadata is not range-checked during deserialization, and the video frame mapping code does not verify that the declared plane geometry fits within the buffer before allowing consumers to read or write video data. A local attacker who controls the sending side of a GStreamer inter-process IPC pipeline can deliver a crafted buffer carrying fabricated strides, causing the receiving process to read or write beyond heap boundaries. Successful exploitation can cause a denial of service or potentially allow code execution within the affected process.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gstreamer1-plugins-base amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-3397](https://patchblox.com/security/data/fix/linux/alas2023-2026-3397.md) | Nov 10, 2026 |
| Linux | gstreamer1-plugins-base-debuginfo amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-3397](https://patchblox.com/security/data/fix/linux/alas2023-2026-3397.md) | Nov 10, 2026 |
| Linux | gstreamer1-plugins-base-debugsource amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-3397](https://patchblox.com/security/data/fix/linux/alas2023-2026-3397.md) | Nov 10, 2026 |
| Linux | gstreamer1-plugins-base-devel amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-3397](https://patchblox.com/security/data/fix/linux/alas2023-2026-3397.md) | Nov 10, 2026 |
| Linux | gstreamer1-plugins-base-tools amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-3397](https://patchblox.com/security/data/fix/linux/alas2023-2026-3397.md) | Nov 10, 2026 |
| Linux | gstreamer1-plugins-base-tools-debuginfo amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-3397](https://patchblox.com/security/data/fix/linux/alas2023-2026-3397.md) | Nov 10, 2026 |

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Data as of 2026-11-11T07:45:43Z 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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