CVE-2026-73473Gstreamer1-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).

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://access.redhat.com/security/cve/CVE-2026-73473 vdb-entry
• RHBZ#2514915 issue-tracking
• https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12231
• https://gstreamer.freedesktop.org/security/sa-2026-0072.html