{"id":"UBUNTU-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":"2026-09-22T03:27:15.973785990Z","published":"2026-08-12T20:17:00Z","upstream":["CVE-2026-73433"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-73433"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-73433"},{"type":"REPORT","url":"https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12231"},{"type":"REPORT","url":"https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12241"},{"type":"REPORT","url":"https://gstreamer.freedesktop.org/security/sa-2026-0072.html"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-73433"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2514801"}],"affected":[{"package":{"name":"gst-plugins-good1.0","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/gst-plugins-good1.0?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.0-1ubuntu1","1.6.1-1ubuntu1","1.6.2-1ubuntu1","1.7.1-1ubuntu1","1.7.2-1ubuntu1","1.7.90-1ubuntu1","1.7.91-1ubuntu1","1.8.0-1ubuntu1","1.8.1-1ubuntu0.1","1.8.2-1ubuntu0.1","1.8.2-1ubuntu0.2","1.8.2-1ubuntu0.3","1.8.3-1ubuntu0.3","1.8.3-1ubuntu0.4","1.8.3-1ubuntu0.5","1.8.3-1ubuntu0.5+esm1","1.8.3-1ubuntu0.5+esm2","1.8.3-1ubuntu0.5+esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"1.8.3-1ubuntu0.5+esm3","binary_name":"gstreamer1.0-plugins-good"},{"binary_name":"gstreamer1.0-pulseaudio","binary_version":"1.8.3-1ubuntu0.5+esm3"},{"binary_version":"1.8.3-1ubuntu0.5+esm3","binary_name":"libgstreamer-plugins-good1.0-0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73433.json"}},{"package":{"name":"gst-plugins-good1.0","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/gst-plugins-good1.0?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.12.3-1ubuntu1","1.12.4-1ubuntu1","1.13.1-1ubuntu1","1.13.91-1ubuntu1","1.14.0-1ubuntu1","1.14.1-1ubuntu1~ubuntu18.04.1","1.14.4-1ubuntu1~ubuntu18.04.1","1.14.5-0ubuntu1~18.04.1","1.14.5-0ubuntu1~18.04.2","1.14.5-0ubuntu1~18.04.3","1.14.5-0ubuntu1~18.04.3+esm1","1.14.5-0ubuntu1~18.04.3+esm2","1.14.5-0ubuntu1~18.04.3+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"gstreamer1.0-gtk3","binary_version":"1.14.5-0ubuntu1~18.04.3+esm3"},{"binary_version":"1.14.5-0ubuntu1~18.04.3+esm3","binary_name":"gstreamer1.0-plugins-good"},{"binary_name":"gstreamer1.0-pulseaudio","binary_version":"1.14.5-0ubuntu1~18.04.3+esm3"},{"binary_name":"gstreamer1.0-qt5","binary_version":"1.14.5-0ubuntu1~18.04.3+esm3"},{"binary_name":"libgstreamer-plugins-good1.0-0","binary_version":"1.14.5-0ubuntu1~18.04.3+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73433.json"}},{"package":{"name":"gst-plugins-good1.0","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/gst-plugins-good1.0?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.16.1-1ubuntu1","1.16.2-1ubuntu1","1.16.2-1ubuntu2","1.16.2-1ubuntu2.1","1.16.3-0ubuntu1","1.16.3-0ubuntu1.1","1.16.3-0ubuntu1.2","1.16.3-0ubuntu1.3","1.16.3-0ubuntu1.3+esm1","1.16.3-0ubuntu1.3+esm2","1.16.3-0ubuntu1.3+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"gstreamer1.0-gtk3","binary_version":"1.16.3-0ubuntu1.3+esm3"},{"binary_name":"gstreamer1.0-plugins-good","binary_version":"1.16.3-0ubuntu1.3+esm3"},{"binary_name":"gstreamer1.0-pulseaudio","binary_version":"1.16.3-0ubuntu1.3+esm3"},{"binary_name":"gstreamer1.0-qt5","binary_version":"1.16.3-0ubuntu1.3+esm3"},{"binary_name":"libgstreamer-plugins-good1.0-0","binary_version":"1.16.3-0ubuntu1.3+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73433.json"}},{"package":{"name":"gst-plugins-good1.0","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/gst-plugins-good1.0?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.18.5-1ubuntu2","1.18.5-1ubuntu3","1.20.0-2ubuntu1","1.20.1-1ubuntu1","1.20.3-0ubuntu1","1.20.3-0ubuntu1.1","1.20.3-0ubuntu1.3","1.20.3-0ubuntu1.4","1.20.3-0ubuntu1.5","1.20.3-0ubuntu1.6","1.20.3-0ubuntu1.7","1.20.3-0ubuntu1.8","1.20.3-0ubuntu1.9"],"ecosystem_specific":{"binaries":[{"binary_version":"1.20.3-0ubuntu1.9","binary_name":"gstreamer1.0-gtk3"},{"binary_name":"gstreamer1.0-plugins-good","binary_version":"1.20.3-0ubuntu1.9"},{"binary_version":"1.20.3-0ubuntu1.9","binary_name":"gstreamer1.0-pulseaudio"},{"binary_name":"gstreamer1.0-qt5","binary_version":"1.20.3-0ubuntu1.9"},{"binary_name":"libgstreamer-plugins-good1.0-0","binary_version":"1.20.3-0ubuntu1.9"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNT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