{"id":"DEBIAN-CVE-2026-73433","details":"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).","modified":"2026-09-24T08:47:40.758323324Z","published":"2026-08-12T20:17:56.810Z","upstream":["CVE-2026-73433"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-73433"}],"affected":[{"package":{"name":"gst-plugins-good1.0","ecosystem":"Debian:12","purl":"pkg:deb/debian/gst-plugins-good1.0?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.22.0-5","1.22.0-5+deb12u1","1.22.0-5+deb12u2","1.22.0-5+deb12u3","1.22.1-1","1.22.10-1","1.22.3-1","1.22.3-2","1.22.4-1","1.22.5-1","1.22.6-1","1.22.7-1","1.22.8-1","1.22.8-2","1.22.8-3","1.22.9-1","1.23.1-1","1.23.2-1","1.23.90-1","1.24.0-1","1.24.1-1","1.24.1-2","1.24.10-1","1.24.11-1","1.24.11-2","1.24.11-3","1.24.11-4","1.24.11-5","1.24.12-1","1.24.2-1","1.24.3-1","1.24.4-1","1.24.5-1","1.24.6-1","1.24.7-1","1.24.8-1","1.24.9-1","1.25.1-1","1.25.1-2","1.25.1-3","1.25.50-1","1.25.90-1","1.25.90-2","1.26.0-1","1.26.1-1","1.26.10-1","1.26.2-1","1.26.3-1","1.26.4-1","1.26.5-1","1.26.5-2","1.26.5-2+hurd.1","1.26.5-3","1.26.6-1","1.26.7-1","1.26.8-1","1.26.9-1","1.27.1-1","1.27.2-1","1.27.50-1","1.27.50-2","1.27.90-1","1.28.0-1","1.28.1-1","1.28.2-1","1.28.2-2","1.28.2-3","1.28.2-4","1.28.3-1","1.28.4-1","1.28.5-1","1.28.6-1","1.28.7-1","1.29.1-1","1.29.2-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73433.json"}},{"package":{"name":"gst-plugins-good1.0","ecosystem":"Debian:13","purl":"pkg:deb/debian/gst-plugins-good1.0?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.26.10-1","1.26.2-1","1.26.2-1+deb13u1","1.26.2-1+deb13u2","1.26.3-1","1.26.4-1","1.26.5-1","1.26.5-2","1.26.5-2+hurd.1","1.26.5-3","1.26.6-1","1.26.7-1","1.26.8-1","1.26.9-1","1.27.1-1","1.27.2-1","1.27.50-1","1.27.50-2","1.27.90-1","1.28.0-1","1.28.1-1","1.28.2-1","1.28.2-2","1.28.2-3","1.28.2-4","1.28.3-1","1.28.4-1","1.28.5-1","1.28.6-1","1.28.7-1","1.29.1-1","1.29.2-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73433.json"}},{"package":{"name":"gst-plugins-good1.0","ecosystem":"Debian:14","purl":"pkg:deb/debian/gst-plugins-good1.0?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28.6-1"}]}],"versions":["1.26.10-1","1.26.2-1","1.26.3-1","1.26.4-1","1.26.5-1","1.26.5-2","1.26.5-2+hurd.1","1.26.5-3","1.26.6-1","1.26.7-1","1.26.8-1","1.26.9-1","1.27.1-1","1.27.2-1","1.27.50-1","1.27.50-2","1.27.90-1","1.28.0-1","1.28.1-1","1.28.2-1","1.28.2-2","1.28.2-3","1.28.2-4","1.28.3-1","1.28.4-1","1.28.5-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73433.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H"}]}