{"id":"UBUNTU-CVE-2026-18649","details":"A flaw was found in the GStreamer gst-plugins-good package. The rtph264depay and rtph265depay RTP depayloader elements do not enforce a maximum size limit on the reassembly buffer used during fragmented RTP packet processing. A remote, unauthenticated attacker can send a continuous stream of RTP fragments without ever transmitting an end-of-fragment marker, causing the reassembly buffer to grow without bound until process memory is exhausted. This results in a denial of service through process termination.","modified":"2026-09-17T19:51:31.383632608Z","published":"2026-08-06T08:16:00Z","related":["USN-8778-1"],"upstream":["CVE-2026-18649"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-18649"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-18649"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-18649"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2510614"},{"type":"REPORT","url":"https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/113"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8778-1"}],"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"},{"fixed":"1.8.3-1ubuntu0.5+esm2"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"gstreamer1.0-plugins-good","binary_version":"1.8.3-1ubuntu0.5+esm2"},{"binary_name":"gstreamer1.0-pulseaudio","binary_version":"1.8.3-1ubuntu0.5+esm2"},{"binary_version":"1.8.3-1ubuntu0.5+esm2","binary_name":"libgstreamer-plugins-good1.0-0"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18649.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"},{"fixed":"1.14.5-0ubuntu1~18.04.3+esm2"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"gstreamer1.0-gtk3","binary_version":"1.14.5-0ubuntu1~18.04.3+esm2"},{"binary_version":"1.14.5-0ubuntu1~18.04.3+esm2","binary_name":"gstreamer1.0-plugins-good"},{"binary_version":"1.14.5-0ubuntu1~18.04.3+esm2","binary_name":"gstreamer1.0-pulseaudio"},{"binary_name":"gstreamer1.0-qt5","binary_version":"1.14.5-0ubuntu1~18.04.3+esm2"},{"binary_name":"libgstreamer-plugins-good1.0-0","binary_version":"1.14.5-0ubuntu1~18.04.3+esm2"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18649.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"},{"fixed":"1.16.3-0ubuntu1.3+esm2"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"gstreamer1.0-gtk3","binary_version":"1.16.3-0ubuntu1.3+esm2"},{"binary_name":"gstreamer1.0-plugins-good","binary_version":"1.16.3-0ubuntu1.3+esm2"},{"binary_version":"1.16.3-0ubuntu1.3+esm2","binary_name":"gstreamer1.0-pulseaudio"},{"binary_version":"1.16.3-0ubuntu1.3+esm2","binary_name":"gstreamer1.0-qt5"},{"binary_version":"1.16.3-0ubuntu1.3+esm2","binary_name":"libgstreamer-plugins-good1.0-0"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18649.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"},{"fixed":"1.20.3-0ubuntu1.8"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"gstreamer1.0-gtk3","binary_version":"1.20.3-0ubuntu1.8"},{"binary_version":"1.20.3-0ubuntu1.8","binary_name":"gstreamer1.0-plugins-good"},{"binary_name":"gstreamer1.0-pulseaudio","binary_version":"1.20.3-0ubuntu1.8"},{"binary_name":"gstreamer1.0-qt5","binary_version":"1.20.3-0ubuntu1.8"},{"binary_name":"libgstreamer-plugins-good1.0-0","binary_version":"1.20.3-0ubuntu1.8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18649.json"}},{"package":{"name":"gst-plugins-good1.0","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/gst-plugins-good1.0?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.24.2-1ubuntu1.6"}]}],"versions":["1.22.6-1ubuntu1","1.22.6-1ubuntu2","1.22.8-3ubuntu1","1.22.9-1ubuntu1","1.24.0-1ubuntu5","1.24.0-1ubuntu7","1.24.1-2ubuntu1","1.24.2-1ubuntu1","1.24.2-1ubuntu1.1","1.24.2-1ubuntu1.2","1.24.2-1ubuntu1.3","1.24.2-1ubuntu1.4","1.24.2-1ubuntu1.5"],"ecosystem_specific":{"binaries":[{"binary_name":"gstreamer1.0-gtk3","binary_version":"1.24.2-1ubuntu1.6"},{"binary_version":"1.24.2-1ubuntu1.6","binary_name":"gstreamer1.0-plugins-good"},{"binary_name":"gstreamer1.0-pulseaudio","binary_version":"1.24.2-1ubuntu1.6"},{"binary_version":"1.24.2-1ubuntu1.6","binary_name":"gstreamer1.0-qt5"},{"binary_version":"1.24.2-1ubuntu1.6","binary_name":"gstreamer1.0-qt6"},{"binary_version":"1.24.2-1ubuntu1.6","binary_name":"libgstreamer-plugins-good1.0-0"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18649.json"}},{"package":{"name":"gst-plugins-good1.0","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/gst-plugins-good1.0?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28.2-2ubuntu0.2"}]}],"versions":["1.26.5-1ubuntu2","1.27.2-1ubuntu1","1.27.90-1ubuntu1","1.28.0-1ubuntu1","1.28.0-1ubuntu3","1.28.1-1ubuntu1","1.28.2-2","1.28.2-2ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"gstreamer1.0-gtk3","binary_version":"1.28.2-2ubuntu0.2"},{"binary_name":"gstreamer1.0-plugins-good","binary_version":"1.28.2-2ubuntu0.2"},{"binary_name":"gstreamer1.0-pulseaudio","binary_version":"1.28.2-2ubuntu0.2"},{"binary_name":"gstreamer1.0-qt5","binary_version":"1.28.2-2ubuntu0.2"},{"binary_name":"gstreamer1.0-qt6","binary_version":"1.28.2-2ubuntu0.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18649.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}