Bug 2564182 (CVE-2026-119843)

Summary: CVE-2026-119843 gst-plugins-good: gst-plugins-good: assertion failures in FLV demuxer when parsing malformed enhanced audio/video tags
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in GStreamer's gst-plugins-good package. The FLV media demuxer does not properly validate buffer sizes and data availability when processing enhanced audio and video tags in malformed or truncated FLV streams. A remote attacker could exploit this vulnerability by providing a specially crafted FLV media file that, when opened or streamed by a GStreamer-based application, triggers an assertion failure or a process crash, leading to denial of service.
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Description OSIDB Bzimport 2026-10-30 16:54:29 UTC
gst-plugins-good FLV demuxer (gst/flv/gstflvdemux.c): missing GstByteReader return checks in gst_flv_demux_parse_tag_audio/video before 1.28.2 when parsing Enhanced RTMP v2 tags; malformed FLV can crash the process (DoS). Fixed in gst-plugins-good 1.28.2 (MR !11244). Upstream GStreamer-SA-2026-0020 (2026-04-07). CVE CVE-2026-119843.