Red Hat Gst-plugins-good up to 1.28.1 FLV Media Demuxer buffer overflow

Summaryinfo

A vulnerability was found in Red Hat Gst-plugins-good up to 1.28.1. It has been rated as problematic. This vulnerability affects unknown code of the component FLV Media Demuxer. This manipulation causes buffer overflow. This vulnerability appears as CVE-2026-119843. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Red Hat Gst-plugins-good up to 1.28.1 and classified as problematic. Affected by this vulnerability is an unknown function of the component FLV Media Demuxer. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect availability. The summary by CVE is:

A flaw was found in GStreamer's gst-plugins-good package. The FLV media demuxer does not properly validate buffer sizes and data availability when processing enhanced audio and video tags in malformed or truncated FLV streams. A remote attacker could exploit this vulnerability by providing a specially crafted FLV media file that, when opened or streamed by a GStreamer-based application, triggers an assertion failure or a process crash, leading to denial of service.

The advisory is shared at access.redhat.com. This vulnerability is known as CVE-2026-119843 since 10/30/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/03/2026).

Upgrading to version 1.28.2 eliminates this vulnerability.

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Productinfo

Vendor

• Red Hat

Name

• Gst-plugins-good

Version

• 1.28.0
• 1.28.1

License

• open-source

Website

• Vendor: https://www.redhat.com/

CPE 2.3info

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CPE 2.2info

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