{"id":"CVE-2026-73433","state":"PUBLISHED","title":"Gstreamer1-plugins-good: gstreamer: unsigned integer underflow in avidemux fujifilm strd parsing leading to out-of-bounds read/write","description":"A flaw was found in GStreamer gst-plugins-good (avidemux). When parsing FUJIFILM metadata in an AVI strd chunk, gst_avi_demux_parse_strd() decrements a remaining-length counter by fixed offsets (98 and 10 bytes) without verifying sufficient data remains. For crafted strd payloads of exactly 106 or 107 bytes, the counter underflows to a very large unsigned value, causing subsequent null-terminated string scanning to read far beyond the allocated heap buffer. Date-format normalization may also write beyond the buffer end. Confirmed impacts include heap out-of-bounds read, out-of-bounds write, heap information disclosure (adjacent data appearing in parsed metadata), and application crash/denial of service. The avidemux element is auto-plugged by playbin, decodebin, and gst-discoverer, so opening or previewing a crafted AVI is sufficient to trigger the issue. Fixed upstream in gst-plugins-good 1.28.6 (GStreamer-SA-2026-0072).","publishedAt":"2026-08-12T19:05:27.296Z","updatedAt":"2026-09-23T15:06:16.082Z","severity":{"score":6.6,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","source":"redhat"},"assigner":"redhat","products":["GStreamer gst-plugins-good","Red Hat Red Hat Enterprise Linux 10","Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support","Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support","Red Hat Red Hat Enterprise Linux 8","Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On","Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On","Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service","Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP 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