Bug 2569078

Summary: CVE-2026-121601 gstreamer1-plugins-bad-free: gstreamer1-plugins-bad-free: Out-of-bounds read in mxfdemux via unchecked delta_id and slice index [fedora-44]
Product: [Fedora] Fedora Reporter: lcelant
Component: gstreamer1-plugins-bad-freeAssignee: Yaakov Selkowitz <yselkowi>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 44CC: dominik, gwync, multimedia-sig, negativo17, wtaymans, yselkowi
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["704b7917-e48f-4b17-a0b0-8065cbb3d16d"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 2565920    

Description lcelant 2026-11-09 11:04:59 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.

gst-plugins-bad mxfdemux (gst/mxf/mxfdemux.c) contains at least five heap-buffer-overflow READ paths introduced in GStreamer 1.20.0 by the index-table refactor (commit ac483b2384, 2021-07-21). Root cause CWE-129: find_edit_entry() and find_entry_for_offset() use delta_id and slice as array indices without validating against n_delta_entries and slice_count.

Affected upstream GStreamer versions: >= 1.20.0, fixed in 1.28.9 (unreleased as of 2026-10-30). Upstream advisory SA-2026-0093; fix in gstreamer-security MR !131.

PSIRT ticket: PSIRTSUPT-29601.

Reporter: Sebastian Dröge, Centricular Ltd.