{"id":"CVE-2026-103963","aliases":["AZL-112445","DEBIAN-CVE-2026-103963","EUVD-2026-113706","GHSA-xwh2-f88c-v27r","OESA-2026-4821","OESA-2026-4822","OESA-2026-4823","UBUNTU-CVE-2026-103963","openSUSE-SU-2026:12363-1"],"status":"published","title":"Glib-networking: unbounded tls 1.3 session ticket queue growth in glib-networking allows remote denial of service","description":"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).","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00339,"percentile":0.27692,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2026-10-30T00:00:00Z","modified":"2026-11-12T23:00:26Z","fixes":[{"ecosystem":"Azure Linux:3","package":"glib-networking","fixed_in":["2.78.0-3"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP4","package":"glib-networking","fixed_in":["2.78.0-6.oe2403sp4"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP1","package":"glib-networking","fixed_in":["2.78.0-6.oe2403sp1"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP3","package":"glib-networking","fixed_in":["2.78.0-6.oe2403sp3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"glib-networking","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.78.0-3"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"glib-networking","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.74.0-4","2.76.0-1","2.76.1-1","2.76.1-2","2.76~beta-1","2.78.0-1","2.80.0-1","2.80.1-1","2.80~alpha-1","2.80~alpha-2","2.80~rc-1","2.90.0-1","2.90.0-2"]},{"source":"osv","ecosystem":"Debian:13","package":"glib-networking","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.80.1-1","2.90.0-1","2.90.0-2"]},{"source":"osv","ecosystem":"Debian:14","package":"glib-networking","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.80.1-1","2.90.0-1","2.90.0-2"]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP4","package":"glib-networking","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.78.0-6.oe2403sp4"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP1","package":"glib-networking","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.78.0-6.oe2403sp1"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP3","package":"glib-networking","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.78.0-6.oe2403sp3"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"glib-networking","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"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"glib-networking","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"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"glib-networking","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"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"glib-networking","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"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"glib-networking","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.78.0-1","2.80~alpha-1","2.80~rc-1","2.80.0-1build1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"glib-networking","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.80.1-1build2","2.90.0-2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"glib-networking","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.80.1-1build1","2.80.1-1build2"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"glib-networking","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.90.1-1.1"}]}],"bundled":7}],"products":[{"vendor":"red hat","product":"red hat enterprise linux 10"},{"vendor":"red hat","product":"red hat enterprise linux 10.2 extended update support"},{"vendor":"red hat","product":"red hat enterprise linux 6"},{"vendor":"red hat","product":"red hat enterprise linux 7"},{"vendor":"red hat","product":"red hat enterprise linux 8"},{"vendor":"red hat","product":"red hat enterprise linux 9"},{"vendor":"red hat","product":"red hat enterprise linux 9.8 extended update support"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:99695","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:99696","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:99697","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:99698","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-103963","tags":["vdb-entry","x_refsource_REDHAT","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2465656","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://gitlab.gnome.org/GNOME/glib-networking/-/merge_requests/288","tags":["report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103963","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-xwh2-f88c-v27r"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-103963","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4821","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4822","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4823","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-103963","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-103963","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2025-60018","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-103963","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-112963","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-113622","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-113623","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-113624","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-2574","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-103963","title":"Glib-networking: unbounded tls 1.3 session ticket queue growth in glib-networking allows remote denial of service","description":"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).","status":"published","published":"2026-10-30T04:08:40.002Z","modified":"2026-11-12T23:00:26.837Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-12T23:49:59.845803Z"}],"euvd":[{"id":"EUVD-2026-113706","description":"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).","status":"published","published":"2026-10-30T04:08:40Z","modified":"2026-11-12T23:00:26Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-13T00:36:24.879993Z"}],"ghsa":[{"id":"GHSA-xwh2-f88c-v27r","title":"A flaw was found in glib-networking. When establishing connections using Transport Layer Security...","description":"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).","status":"published","published":"2026-10-30T06:32:01Z","modified":"2026-11-13T00:32:29Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-13T00:44:37.510355Z"}],"nvd":[{"id":"CVE-2026-103963","description":"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).","status":"published","published":"2026-10-30T05:16:57.237Z","modified":"2026-11-12T22:17:34.94Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-400"],"updated_at":"2026-11-12T23:33:06.355017Z"}],"osv":[{"id":"DEBIAN-CVE-2026-103963","description":"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).","status":"published","published":"2026-10-30T05:16:57.237Z","modified":"2026-11-05T09:47:39.037327405Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-05T13:31:24.64316Z"},{"id":"OESA-2026-4821","title":"glib-networking security update","description":"glib-networking contains the implementations of certain GLib networking features that cannot be implemented directly in GLib itself because of their dependencies.\r\n\r\nSecurity Fix(es):\n\nA 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).(CVE-2026-103963)","status":"published","published":"2026-11-11T12:26:31Z","modified":"2026-11-11T12:45:08.41072866Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-11T13:08:46.301371Z"},{"id":"OESA-2026-4822","title":"glib-networking security update","description":"glib-networking contains the implementations of certain GLib networking features that cannot be implemented directly in GLib itself because of their dependencies.\r\n\r\nSecurity Fix(es):\n\nA 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).(CVE-2026-103963)","status":"published","published":"2026-11-11T12:26:31Z","modified":"2026-11-11T12:45:10.165749033Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-11T13:08:46.301371Z"},{"id":"OESA-2026-4823","title":"glib-networking security update","description":"glib-networking contains the implementations of certain GLib networking features that cannot be implemented directly in GLib itself because of their dependencies.\r\n\r\nSecurity Fix(es):\n\nA 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).(CVE-2026-103963)","status":"published","published":"2026-11-11T12:26:32Z","modified":"2026-11-11T12:45:11.073982141Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-11T13:08:46.301371Z"},{"id":"UBUNTU-CVE-2026-103963","description":"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).","status":"published","published":"2026-10-30T05:16:00Z","modified":"2026-11-05T04:42:37Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-05T13:33:25.727744Z"},{"id":"AZL-112445","title":"CVE-2026-103963 affecting package glib-networking for versions less than 2.78.0-3","description":"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).","status":"published","published":"2026-10-30T05:16:57Z","modified":"2026-11-06T14:17:02.647407744Z","updated_at":"2026-11-06T14:57:15.495576Z"},{"id":"openSUSE-SU-2026:12363-1","title":"glib-networking-2.90.1-1.1 on GA media","description":"These are all security issues fixed in the glib-networking-2.90.1-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-10-30T00:00:00Z","modified":"2026-10-31T18:00:06.781780444Z","updated_at":"2026-11-02T16:58:41.463445Z"}]}}