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This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-125040 →
Unrated

A flaw was found in the SRT and WebVTT subtitle parser in GStreamer's gst-plugins-base. While sanitizing inline subtitle markup, the parser repeatedly...

UBUNTU-CVE-2026-125040 First seen on SecPulse

Affected packages

PackageAffected → Fixed
Ubuntu:Pro:16.04:LTSgst-plugins-base1.0
All versions→ Not listed
Ubuntu:Pro:18.04:LTSgst-plugins-base1.0
All versions→ Not listed
Ubuntu:Pro:20.04:LTSgst-plugins-base1.0
All versions→ Not listed
Ubuntu:22.04:LTSgst-plugins-base1.0
All versions→ Not listed
Ubuntu:24.04:LTSgst-plugins-base1.0
All versions→ Not listed
Ubuntu:26.10gst-plugins-base1.0
All versions→ Not listed
Ubuntu:26.04:LTSgst-plugins-base1.0
All versions→ Not listed

This record does not list fixed versions. Check the article or the vendor advisory in the references for whether and where it is fixed.

Original description The description as published by the source.

A flaw was found in the SRT and WebVTT subtitle parser in GStreamer's gst-plugins-base. While sanitizing inline subtitle markup, the parser repeatedly searches the remaining text with unanchored regular expressions. A crafted subtitle cue with a long line of unmatched markup-like text can force quadratic CPU use and make a GStreamer-based application unresponsive.

Source: OSV.dev (Open Source Vulnerabilities) OSV

References

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