{"id":"CVE-2020-14311","details":"There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.","modified":"2026-04-16T00:02:51.274609951Z","published":"2020-07-31T22:15:11.597Z","related":["SUSE-SU-2020:14440-1","SUSE-SU-2020:2073-1","SUSE-SU-2020:2074-1","SUSE-SU-2020:2076-1","SUSE-SU-2020:2077-1","SUSE-SU-2020:2078-1","SUSE-SU-2020:2079-1","openSUSE-SU-2020:1168-1","openSUSE-SU-2020:1169-1"],"references":[{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202104-05"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4432-1/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/09/17/2"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/09/17/4"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/09/21/1"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-14311.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"2.06"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.1"}]},{"events":[{"introduced":"0"},{"last_affected":"8.2"}]},{"events":[{"introduced":"0"},{"last_affected":"8.2"}]},{"events":[{"introduced":"0"},{"last_affected":"8.2"}]},{"events":[{"introduced":"0"},{"last_affected":"15.1"}]},{"events":[{"introduced":"0"},{"last_affected":"15.2"}]},{"events":[{"introduced":"0"},{"last_affected":"14.04"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"20.04"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H"}]}