{"id":"UBUNTU-CVE-2025-4373","details":"A flaw was found in GLib, which is vulnerable to an integer overflow in the g_string_insert_unichar() function. When the position at which to insert the character is large, the position will overflow, leading to a buffer underwrite.","modified":"2026-09-21T21:38:38.118309854Z","published":"2025-05-06T15:16:00Z","related":["USN-7532-1"],"upstream":["CVE-2025-4373"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-4373"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-4373"},{"type":"REPORT","url":"https://gitlab.gnome.org/GNOME/glib/-/issues/3677"},{"type":"REPORT","url":"https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4588"},{"type":"REPORT","url":"https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4592"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2025-4373"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2364265"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7532-1"}],"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_name":"libglib2.0-0-refdbg","binary_version":"2.40.2-0ubuntu1.1+esm8"},{"binary_name":"libglib2.0-bin","binary_version":"2.40.2-0ubuntu1.1+esm8"},{"binary_version":"2.40.2-0ubuntu1.1+esm8","binary_name":"libglib2.0-data"},{"binary_name":"libglib2.0-tests","binary_version":"2.40.2-0ubuntu1.1+esm8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-4373.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_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_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/2025/UBUNTU-CVE-2025-4373.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_version":"2.56.4-0ubuntu0.18.04.9+esm6","binary_name":"libglib2.0-0"},{"binary_name":"libglib2.0-bin","binary_version":"2.56.4-0ubuntu0.18.04.9+esm6"},{"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/2025/UBUNTU-CVE-2025-4373.json"}},{"package":{"name":"glib2.0","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/glib2.0?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.64.6-1~ubuntu20.04.9"}]}],"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.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