Bug 2569214

Summary: CVE-2026-125040 gstreamer1-plugins-base: gst-plugins-base: Quadratic regex processing in SRT/WebVTT subtitle parser causes denial of service [fedora-43]
Product: [Fedora] Fedora Reporter: lcelant
Component: gstreamer1-plugins-baseAssignee: Wim Taymans <wtaymans>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 43CC: gwync, multimedia-sig, negativo17, wtaymans
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["d12c5104-ce5f-4f0f-988f-42f28af811ef"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 2569124    

Description lcelant 2026-11-09 16:48:38 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

GStreamer-SA-2026-0023: The SRT/WebVTT subtitle parser (subparse) uses regular-expression matching and replacement with quadratic time complexity for long lines. A crafted subtitle file can cause excessive CPU use and application unresponsiveness. Fixed in gst-plugins-base 1.28.2.