5.5 Medium

CVE-2026-73473 Gstreamer1-plugins-good: gstreamer: missing subindex entry count validation in avidemux leading to denial of service

Description

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).

CVSS 3.1 detail

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploitable with local access to the machine, without an account and if a user takes an action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Local
Attack complexity: Low
Privileges required: None
Interaction: Required
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Affected products and versions

Product	Affected versions	Fixed in
gst-plugins-good 1.28	earliest → < 1.28.6	1.28.6

References

access.redhat.com access.redhat.com
RHBZ#2514915 bugzilla.redhat.com
gitlab.freedesktop.org gitlab.freedesktop.org
gstreamer.freedesktop.org gstreamer.freedesktop.org

Timeline

Published November 6, 2026
Last modified November 6, 2026

The 5 CVEs of gst-plugins-good →

CVE-2026-73471 Gstreamer1-plugins-good: gstreamer: out-of-bounds read in avidemux nikon metadata tag parsing 6.1 Medium CVE-2026-73472 Gstreamer1-plugins-good: gstreamer: integer overflow in avidemux superindex/subindex parsing leading to out-of-bounds read 6.1 Medium CVE-2026-73433 A flaw was found in GStreamer gst-plugins-good (avidemux) 6.6 Medium CVE-2026-73434 A flaw was found in GStreamer gst-plugins-good (avidemux) 6.1 Medium

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