---
id: "CVE-2026-121601"
page: "https://infrastack.ai/live/CVE-2026-121601"
kind: "vulnerability"
aliases: ["CVE-2026-121601"]
title: "GStreamer: crafted MXF file can crash apps and leak heap memory"
severity: "medium"
cvss: 6.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["gst-plugins-bad", "gstreamer", "media-playback", "package"]
not_affected_if: ["no-mxf-parsing", "plugin-not-installed"]
published_at: "2026-11-09T13:17:06+00:00"
first_seen_at: "2026-11-09T13:26:50+00:00"
updated_at: "2026-11-09T13:27:39+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121601", "first_seen_at": "2026-11-09T13:26:50+00:00"}]
exploit_sources: []
---

# GStreamer: crafted MXF file can crash apps and leak heap memory

Link for people: https://infrastack.ai/live/CVE-2026-121601 (this .md is for agents)

GStreamer's MXF demuxer in gst-plugins-bad indexes internal tables with unchecked values from the file. A crafted MXF media file can crash the application or let an attacker read limited heap memory next to those arrays.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-11-09T13:26:50+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121601

## From the sources

A flaw was found in GStreamer's MXF demuxer plugin (gst-plugins-bad). When processing a specially crafted MXF media file, the demuxer indexes its internal delta-entry and slice-offset tables using values from the file without validating that they are within the bounds of the allocated arrays. A local attacker who tricks a user into opening a malicious MXF file can cause the application to crash (denial of service) and may be able to read limited amounts of heap memory adjacent to the affected arrays.

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