{"id":"CVE-2021-27218","title":"An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4","summary":"An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. If g_byte_array_new_take() was called with a buffer of 4GB or more on a 64-bit platform, the length would be truncated modulo 2**32, causing unintended length …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-681"],"vendor":"gnome","product":"glib","affected":["glib < 2.66.7","glib >= 2.67.0, < 2.67.4","fedora = 33","fedora = 34","active_iq_unified_manager","cloud_backup","e-series_performance_analyzer","brocade_fabric_operating_system_firmware","debian_linux = 9.0"],"patched":["glib 2.67.4"],"published":"2021-02-15","updated":"2026-10-14","sourceUpdated":"2026-10-14T12:17:10.057","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-27218","references":[{"url":"https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1942","label":"cve@mitre.org"},{"url":"https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1944","label":"cve@mitre.org"},{"url":"https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E","label":"cve@mitre.org"},{"url":"https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E","label":"cve@mitre.org"},{"url":"https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2022/06/msg00006.html","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2REA7RVKN7ZHRLJOEGBRQKJIPZQPAELZ/","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJMPNDO4GDVURYQFYKFOWY5HAF4FTEPN/","label":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/202107-13","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20210319-0004/","label":"cve@mitre.org"},{"url":"https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1942","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1944","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2022/06/msg00006.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2REA7RVKN7ZHRLJOEGBRQKJIPZQPAELZ/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJMPNDO4GDVURYQFYKFOWY5HAF4FTEPN/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202107-13","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20210319-0004/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.0408,"epssPercentile":0.90491,"ingestedAt":"2026-10-14T12:29:10.815Z","slug":"CVE-2021-27218","body":"## Overview\n\nAn issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. If g_byte_array_new_take() was called with a buffer of 4GB or more on a 64-bit platform, the length would be truncated modulo 2**32, causing unintended length truncation.\n\n## Affected\n\n- `glib < 2.66.7`\n- `glib >= 2.67.0, < 2.67.4`\n- `fedora = 33`\n- `fedora = 34`\n- `active_iq_unified_manager`\n- `cloud_backup`\n- `e-series_performance_analyzer`\n- `brocade_fabric_operating_system_firmware`\n- `debian_linux = 9.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `glib 2.67.4`","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":41.3,"likelihood":0.8,"exploitation":0,"ransomware":0},"changes":[]}