---
id: CVE-2026-73473
title: >-
  Gstreamer1-plugins-good: gstreamer: missing subindex entry count validation in
  avidemux leading to denial of service
summary: >-
  A flaw was found in GStreamer gst-plugins-good (avidemux). In the subindex
  parser, missing validation of the entry count can cause excessive memory
  allocation and denial of service. Because avidemux is auto-plugged by playbin,
  decodebin,…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-770
vendor: GStreamer
product: gst-plugins-good
affected:
  - gst-plugins-good < 1.28.6
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T06:32:22.598Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-73473'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-73473'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2514915'
    label: RHBZ#2514915
  - url: 'https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12231'
  - url: 'https://gstreamer.freedesktop.org/security/sa-2026-0072.html'
tags:
  - cve.org
ingestedAt: '2026-11-06T06:46:27.261Z'
---

## Overview

A flaw was found in GStreamer gst-plugins-good (avidemux). In the subindex parser, missing validation of the entry count can cause excessive memory allocation and denial of service. Because avidemux is auto-plugged by playbin, decodebin, and gst-discoverer, opening or previewing a crafted AVI is sufficient to trigger the issue. Fixed upstream in gst-plugins-good 1.28.6 (GStreamer-SA-2026-0072).

## Affected

- `gst-plugins-good < 1.28.6`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.