{"id":"UBUNTU-CVE-2026-103963","details":"A flaw was found in glib-networking. When establishing connections using Transport Layer Security (TLS) version 1.3, the client-side session cache does not limit the number of session tickets retained for a single host. A malicious server can exploit this by sending excessive session ticket messages, causing the client application to continuously consume memory. This unbounded memory growth can exhaust system memory, resulting in a Denial of Service (DoS).","modified":"2026-10-31T03:30:05.239970445Z","published":"2026-10-30T00:00:00Z","upstream":["CVE-2026-103963"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-103963"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-103963"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-103963"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2465656"},{"type":"REPORT","url":"https://gitlab.gnome.org/GNOME/glib-networking/-/merge_requests/288"}],"affected":[{"package":{"name":"glib-networking","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/glib-networking?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.46.0-1","2.46.1-1","2.46.1-1build1","2.48.0-1","2.48.2-1~ubuntu16.04.1","2.48.2-1~ubuntu16.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"glib-networking","binary_version":"2.48.2-1~ubuntu16.04.2"},{"binary_name":"glib-networking-common","binary_version":"2.48.2-1~ubuntu16.04.2"},{"binary_version":"2.48.2-1~ubuntu16.04.2","binary_name":"glib-networking-services"},{"binary_name":"glib-networking-tests","binary_version":"2.48.2-1~ubuntu16.04.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"}},{"package":{"name":"glib-networking","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/glib-networking?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.54.0-1","2.54.1-1","2.54.1-2","2.55.90-1","2.56.0-1","2.56.0-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.56.0-1ubuntu0.1","binary_name":"glib-networking"},{"binary_name":"glib-networking-common","binary_version":"2.56.0-1ubuntu0.1"},{"binary_version":"2.56.0-1ubuntu0.1","binary_name":"glib-networking-services"},{"binary_version":"2.56.0-1ubuntu0.1","binary_name":"glib-networking-tests"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"}},{"package":{"name":"glib-networking","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/glib-networking?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.62.1-1","2.63.2-1","2.63.3-0build1","2.63.90-1ubuntu1","2.63.91-1ubuntu1","2.64.0-1","2.64.1-1","2.64.2-1build1","2.64.2-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"glib-networking","binary_version":"2.64.2-1ubuntu0.1"},{"binary_name":"glib-networking-common","binary_version":"2.64.2-1ubuntu0.1"},{"binary_version":"2.64.2-1ubuntu0.1","binary_name":"glib-networking-services"},{"binary_name":"glib-networking-tests","binary_version":"2.64.2-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"}},{"package":{"name":"glib-networking","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/glib-networking?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.68.2-2","2.70.0-1","2.70.1-1","2.72~alpha-1","2.72~beta-1build1","2.72.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"glib-networking","binary_version":"2.72.0-1"},{"binary_name":"glib-networking-common","binary_version":"2.72.0-1"},{"binary_name":"glib-networking-services","binary_version":"2.72.0-1"},{"binary_version":"2.72.0-1","binary_name":"glib-networking-tests"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"}},{"package":{"name":"glib-networking","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/glib-networking?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.78.0-1","2.80~alpha-1","2.80~rc-1","2.80.0-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"glib-networking","binary_version":"2.80.0-1build1"},{"binary_version":"2.80.0-1build1","binary_name":"glib-networking-common"},{"binary_name":"glib-networking-services","binary_version":"2.80.0-1build1"},{"binary_name":"glib-networking-tests","binary_version":"2.80.0-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"}},{"package":{"name":"glib-networking","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/glib-networking?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.80.1-1build2","2.90.0-2"],"ecosystem_specific":{"binaries":[{"binary_name":"glib-networking","binary_version":"2.90.0-2"},{"binary_version":"2.90.0-2","binary_name":"glib-networking-common"},{"binary_version":"2.90.0-2","binary_name":"glib-networking-services"},{"binary_version":"2.90.0-2","binary_name":"glib-networking-tests"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"}},{"package":{"name":"glib-networking","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/glib-networking?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.80.1-1build1","2.80.1-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"glib-networking","binary_version":"2.80.1-1build2"},{"binary_version":"2.80.1-1build2","binary_name":"glib-networking-common"},{"binary_version":"2.80.1-1build2","binary_name":"glib-networking-services"},{"binary_name":"glib-networking-tests","binary_version":"2.80.1-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"}}],"schema_version":"1.9.2","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"}]}