CVE-2026-73473

MEDIUM 5.5

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

CVSS Score

5.5

EPSS Score

0.0%

EPSS Percentile

0th

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).

CWE	CWE-770
Vendor	gstreamer
Product	gst-plugins-good
Published	Nov 6, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

GStreamer / gst-plugins-good

0 < 1.28.6

References

NVD ↗ CVE.org ↗ EPSS Data ↗

access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-73473 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2514915 gitlab.freedesktop.org: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12231 gstreamer.freedesktop.org: https://gstreamer.freedesktop.org/security/sa-2026-0072.html

Credits

Red Hat would like to thank Seonwook Kim for reporting this issue.