{"id":"UBUNTU-CVE-2026-53704","details":"A flaw was found in GStreamer's RealMedia demuxer in the gst-plugins-ugly package. When processing a RealMedia file containing a specially crafted FILEINFO metadata section, the demuxer parses variable-name and variable-value pairs using re_skip_pascal_string() without validating that offsets remain within the mapped buffer. Additionally, the element count controlling the parsing loop is read from attacker-controlled data without validation, which can cause an infinite loop. A crafted RealMedia file can cause the application to crash, hang, or potentially read limited adjacent memory contents.","modified":"2026-06-24T11:01:55.409363857Z","published":"2026-06-15T20:16:00Z","upstream":["CVE-2026-53704"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53704"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-53704"},{"type":"REPORT","url":"https://gstreamer.freedesktop.org/security/sa-2026-0042.html"},{"type":"REPORT","url":"https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11825"},{"type":"REPORT","url":"https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11826"},{"type":"REPORT","url":"https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11831"},{"type":"REPORT","url":"https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11832"}],"affected":[{"package":{"name":"gst-plugins-ugly1.0","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/gst-plugins-ugly1.0?arch=source&distro=xenial"},"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","1.8.3-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"gstreamer1.0-plugins-ugly","binary_version":"1.8.3-1ubuntu0.1"},{"binary_name":"gstreamer1.0-plugins-ugly-amr","binary_version":"1.8.3-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53704.json"}},{"package":{"name":"gst-plugins-ugly1.0","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/gst-plugins-ugly1.0?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.12.3-1","1.12.3-1build1","1.12.4-1","1.12.4-1build1","1.13.1-1","1.13.91-1","1.14.0-1","1.14.1-1~ubuntu18.04.1","1.14.4-1~ubuntu18.04.1","1.14.5-0ubuntu1~18.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"gstreamer1.0-plugins-ugly","binary_version":"1.14.5-0ubuntu1~18.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53704.json"}},{"package":{"name":"gst-plugins-ugly1.0","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/gst-plugins-ugly1.0?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.16.1-1","1.16.1-1build1","1.16.2-1","1.16.2-2","1.16.2-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"gstreamer1.0-plugins-ugly","binary_version":"1.16.2-2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53704.json"}},{"package":{"name":"gst-plugins-ugly1.0","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/gst-plugins-ugly1.0?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.18.5-1","1.20.0-1","1.20.0-1build1","1.20.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"gstreamer1.0-plugins-ugly","binary_version":"1.20.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53704.json"}},{"package":{"name":"gst-plugins-ugly1.0","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/gst-plugins-ugly1.0?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.22.5-1","1.22.6-1","1.22.7-1","1.22.8-1","1.22.10-1","1.24.1-1","1.24.1-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.24.1-1build1","binary_name":"gstreamer1.0-plugins-ugly"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53704.json"}},{"package":{"name":"gst-plugins-ugly1.0","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/gst-plugins-ugly1.0?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.26.0-1","1.26.1-1","1.26.2-1","1.26.3-1","1.26.3-3","1.26.3-4","1.26.4-1","1.26.5-1","1.26.6-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.26.6-1","binary_name":"gstreamer1.0-plugins-ugly"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53704.json"}},{"package":{"name":"gst-plugins-ugly1.0","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/gst-plugins-ugly1.0?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.26.6-1","1.26.7-1build1","1.27.2-1","1.27.90-1","1.28.0-1","1.28.1-1","1.28.2-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.28.2-1","binary_name":"gstreamer1.0-plugins-ugly"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53704.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}