{"id":"CVE-2018-1093","details":"The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.","modified":"2026-04-16T01:44:15.624955075Z","published":"2018-04-02T03:29:00.307Z","related":["SUSE-SU-2018:1761-1","SUSE-SU-2018:1762-1","SUSE-SU-2018:1816-1","SUSE-SU-2018:1855-1","SUSE-SU-2018:1855-2","SUSE-SU-2018:2092-1"],"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html"},{"type":"WEB","url":"https://usn.ubuntu.com/3676-1/"},{"type":"WEB","url":"https://usn.ubuntu.com/3676-2/"},{"type":"WEB","url":"https://usn.ubuntu.com/3752-1/"},{"type":"WEB","url":"https://usn.ubuntu.com/3752-2/"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2018/06/msg00000.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html"},{"type":"WEB","url":"https://usn.ubuntu.com/3752-3/"},{"type":"WEB","url":"https://usn.ubuntu.com/3754-1/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2018/dsa-4188"},{"type":"REPORT","url":"https://bugzilla.kernel.org/show_bug.cgi?id=199181"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1560782"},{"type":"FIX","url":"https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=7dac4a1726a9c64a517d595c40e95e2d0d135f6f"},{"type":"ARTICLE","url":"http://openwall.com/lists/oss-security/2018/03/29/1"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-1093.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"4.15.15"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}