{"id":"UBUNTU-CVE-2026-1484","details":"A flaw was found in the GLib Base64 encoding routine when processing very large input data. Due to incorrect use of integer types during length calculation, the library may miscalculate buffer boundaries. This can cause memory writes outside the allocated buffer. Applications that process untrusted or extremely large Base64 input using GLib may crash or behave unpredictably.","modified":"2026-09-21T21:39:17.508661107Z","published":"2026-01-27T14:15:00Z","related":["USN-8017-1"],"upstream":["CVE-2026-1484"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-1484"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-1484"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-1484"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8017-1"}],"affected":[{"package":{"name":"glib2.0","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/glib2.0?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.38.0-1ubuntu1","2.38.1-1","2.39.1-0ubuntu1","2.39.1-0ubuntu2","2.39.1-0ubuntu3","2.39.2-0ubuntu1","2.39.2-0ubuntu2","2.39.3-0ubuntu4","2.39.4-0ubuntu1","2.39.90-0ubuntu1","2.39.91-0ubuntu2","2.39.91-0ubuntu3","2.39.92-2","2.40.0-1","2.40.0-1ubuntu1","2.40.0-2","2.40.2-0ubuntu1","2.40.2-0ubuntu1.1","2.40.2-0ubuntu1.1+esm1","2.40.2-0ubuntu1.1+esm2","2.40.2-0ubuntu1.1+esm3","2.40.2-0ubuntu1.1+esm4","2.40.2-0ubuntu1.1+esm6","2.40.2-0ubuntu1.1+esm7","2.40.2-0ubuntu1.1+esm8"],"ecosystem_specific":{"binaries":[{"binary_name":"libglib2.0-0","binary_version":"2.40.2-0ubuntu1.1+esm8"},{"binary_version":"2.40.2-0ubuntu1.1+esm8","binary_name":"libglib2.0-0-refdbg"},{"binary_version":"2.40.2-0ubuntu1.1+esm8","binary_name":"libglib2.0-bin"},{"binary_name":"libglib2.0-data","binary_version":"2.40.2-0ubuntu1.1+esm8"},{"binary_version":"2.40.2-0ubuntu1.1+esm8","binary_name":"libglib2.0-tests"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1484.json"}},{"package":{"name":"glib2.0","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/glib2.0?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.46.1-1","2.46.1-2","2.47.1-1","2.47.3-3","2.47.4-1","2.47.5-1","2.47.6-1","2.48.0-1ubuntu3","2.48.0-1ubuntu4","2.48.1-1~ubuntu16.04.1","2.48.2-0ubuntu1","2.48.2-0ubuntu3","2.48.2-0ubuntu4","2.48.2-0ubuntu4.1","2.48.2-0ubuntu4.2","2.48.2-0ubuntu4.3","2.48.2-0ubuntu4.4","2.48.2-0ubuntu4.5","2.48.2-0ubuntu4.6","2.48.2-0ubuntu4.7","2.48.2-0ubuntu4.8","2.48.2-0ubuntu4.8+esm1","2.48.2-0ubuntu4.8+esm3","2.48.2-0ubuntu4.8+esm4","2.48.2-0ubuntu4.8+esm5","2.48.2-0ubuntu4.8+esm6"],"ecosystem_specific":{"binaries":[{"binary_name":"libglib2.0-0","binary_version":"2.48.2-0ubuntu4.8+esm6"},{"binary_version":"2.48.2-0ubuntu4.8+esm6","binary_name":"libglib2.0-0-refdbg"},{"binary_version":"2.48.2-0ubuntu4.8+esm6","binary_name":"libglib2.0-bin"},{"binary_version":"2.48.2-0ubuntu4.8+esm6","binary_name":"libglib2.0-data"},{"binary_version":"2.48.2-0ubuntu4.8+esm6","binary_name":"libglib2.0-tests"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1484.json"}},{"package":{"name":"glib2.0","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/glib2.0?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.54.1-1ubuntu1","2.55.2-2ubuntu1","2.56.0-2ubuntu1","2.56.0-4ubuntu1","2.56.1-2ubuntu1","2.56.2-0ubuntu0.18.04.1","2.56.2-0ubuntu0.18.04.2","2.56.3-0ubuntu0.18.04.1","2.56.4-0ubuntu0.18.04.2","2.56.4-0ubuntu0.18.04.3","2.56.4-0ubuntu0.18.04.4","2.56.4-0ubuntu0.18.04.5","2.56.4-0ubuntu0.18.04.6","2.56.4-0ubuntu0.18.04.7","2.56.4-0ubuntu0.18.04.8","2.56.4-0ubuntu0.18.04.9","2.56.4-0ubuntu0.18.04.9+esm3","2.56.4-0ubuntu0.18.04.9+esm4","2.56.4-0ubuntu0.18.04.9+esm5","2.56.4-0ubuntu0.18.04.9+esm6"],"ecosystem_specific":{"binaries":[{"binary_name":"libglib2.0-0","binary_version":"2.56.4-0ubuntu0.18.04.9+esm6"},{"binary_version":"2.56.4-0ubuntu0.18.04.9+esm6","binary_name":"libglib2.0-bin"},{"binary_name":"libglib2.0-data","binary_version":"2.56.4-0ubuntu0.18.04.9+esm6"},{"binary_name":"libglib2.0-dev-bin","binary_version":"2.56.4-0ubuntu0.18.04.9+esm6"},{"binary_name":"libglib2.0-tests","binary_version":"2.56.4-0ubuntu0.18.04.9+esm6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1484.json"}},{"package":{"name":"glib2.0","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/glib2.0?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.62.1-1","2.63.1-2","2.63.1-2ubuntu1","2.63.3-1","2.63.3-3","2.63.5-2","2.64.0-1","2.64.1-1","2.64.2-1~fakesync1","2.64.3-1~ubuntu20.04.1","2.64.6-1~ubuntu20.04.1","2.64.6-1~ubuntu20.04.2","2.64.6-1~ubuntu20.04.3","2.64.6-1~ubuntu20.04.4","2.64.6-1~ubuntu20.04.6","2.64.6-1~ubuntu20.04.7","2.64.6-1~ubuntu20.04.8","2.64.6-1~ubuntu20.04.9","2.64.6-1~ubuntu20.04.9+esm1","2.64.6-1~ubuntu20.04.9+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"libglib2.0-0","binary_version":"2.64.6-1~ubuntu20.04.9+esm2"},{"binary_version":"2.64.6-1~ubuntu20.04.9+esm2","binary_name":"libglib2.0-bin"},{"binary_version":"2.64.6-1~ubuntu20.04.9+esm2","binary_name":"libglib2.0-data"},{"binary_name":"libglib2.0-dev-bin","binary_version":"2.64.6-1~ubuntu20.04.9+esm2"},{"binary_name":"libglib2.0-tests","binary_version":"2.64.6-1~ubuntu20.04.9+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1484.json"}},{"package":{"name":"glib2.0","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/glib2.0?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.72.4-0ubuntu2.9"}]}],"versions":["2.68.4-1ubuntu1","2.70.1-1","2.70.2-1","2.71.0-2","2.71.1-1","2.71.2-1","2.71.3-1","2.72.0-1","2.72.1-1","2.72.4-0ubuntu1","2.72.4-0ubuntu2","2.72.4-0ubuntu2.2","2.72.4-0ubuntu2.3","2.72.4-0ubuntu2.4","2.72.4-0ubuntu2.5","2.72.4-0ubuntu2.6","2.72.4-0ubuntu2.7","2.72.4-0ubuntu2.8"],"ecosystem_specific":{"binaries":[{"binary_version":"2.72.4-0ubuntu2.9","binary_name":"libglib2.0-0"},{"binary_name":"libglib2.0-bin","binary_version":"2.72.4-0ubuntu2.9"},{"binary_version":"2.72.4-0ubuntu2.9","binary_name":"libglib2.0-data"},{"binary_name":"libglib2.0-dev-bin","binary_version":"2.72.4-0ubuntu2.9"},{"binary_name":"libglib2.0-tests","binary_version":"2.72.4-0ubuntu2.9"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1484.json"}},{"package":{"name":"glib2.0","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/glib2.0?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.80.0-6ubuntu3.8"}]}],"versions":["2.78.0-2","2.78.1-4","2.78.3-1","2.78.3-2","2.79.1-1","2.79.2-1~ubuntu1","2.79.3-3ubuntu5","2.80.0-6ubuntu1","2.80.0-6ubuntu3","2.80.0-6ubuntu3.1","2.80.0-6ubuntu3.2","2.80.0-6ubuntu3.4","2.80.0-6ubuntu3.5","2.80.0-6ubuntu3.6","2.80.0-6ubuntu3.7"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-girepository-3.0","binary_version":"2.80.0-6ubuntu3.8"},{"binary_name":"gir1.2-glib-2.0","binary_version":"2.80.0-6ubuntu3.8"},{"binary_name":"libgirepository-2.0-0","binary_version":"2.80.0-6ubuntu3.8"},{"binary_name":"libglib2.0-0t64","binary_version":"2.80.0-6ubuntu3.8"},{"binary_name":"libglib2.0-bin","binary_version":"2.80.0-6ubuntu3.8"},{"binary_name":"libglib2.0-data","binary_version":"2.80.0-6ubuntu3.8"},{"binary_name":"libglib2.0-dev-bin","binary_version":"2.80.0-6ubuntu3.8"},{"binary_name":"libglib2.0-tests","binary_version":"2.80.0-6ubuntu3.8"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1484.json"}},{"package":{"name":"glib2.0","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/glib2.0?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.86.0-2ubuntu0.3"}]}],"versions":["2.84.1-1","2.84.1-2","2.84.2-1","2.84.3-1","2.85.1-2","2.85.2-2","2.85.3-1","2.86.0-2","2.86.0-2ubuntu0.1","2.86.0-2ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.86.0-2ubuntu0.3","binary_name":"gir1.2-girepository-3.0"},{"binary_name":"gir1.2-glib-2.0","binary_version":"2.86.0-2ubuntu0.3"},{"binary_name":"girepository-tools","binary_version":"2.86.0-2ubuntu0.3"},{"binary_version":"2.86.0-2ubuntu0.3","binary_name":"libgio-2.0-dev-bin"},{"binary_name":"libgirepository-2.0-0","binary_version":"2.86.0-2ubuntu0.3"},{"binary_name":"libglib2.0-0t64","binary_version":"2.86.0-2ubuntu0.3"},{"binary_name":"libglib2.0-bin","binary_version":"2.86.0-2ubuntu0.3"},{"binary_version":"2.86.0-2ubuntu0.3","binary_name":"libglib2.0-data"},{"binary_version":"2.86.0-2ubuntu0.3","binary_name":"libglib2.0-dev-bin"},{"binary_name":"libglib2.0-tests","binary_version":"2.86.0-2ubuntu0.3"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1484.json"}},{"package":{"name":"glib2.0","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/glib2.0?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.87.2-2"}]}],"versions":["2.86.0-2","2.86.1-1","2.86.1-2","2.86.2-1","2.86.3-1","2.86.3-4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2.87.2-2","binary_name":"gir1.2-girepository-3.0"},{"binary_version":"2.87.2-2","binary_name":"gir1.2-glib-2.0"},{"binary_name":"girepository-tools","binary_version":"2.87.2-2"},{"binary_name":"libgio-2.0-dev-bin","binary_version":"2.87.2-2"},{"binary_name":"libgirepository-2.0-0","binary_version":"2.87.2-2"},{"binary_name":"libglib2.0-0t64","binary_version":"2.87.2-2"},{"binary_name":"libglib2.0-bin","binary_version":"2.87.2-2"},{"binary_name":"libglib2.0-data","binary_version":"2.87.2-2"},{"binary_name":"libglib2.0-dev-bin","binary_version":"2.87.2-2"},{"binary_name":"libglib2.0-tests","binary_version":"2.87.2-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1484.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L"},{"type":"Ubuntu","score":"medium"}]}