{"schema_version":"1.7.5","id":"CVE-2023-38431","published":"2023-07-18T00:15:09.707Z","modified":"2026-03-15T22:47:05.791964Z","details":"An issue was discovered in the Linux kernel before 6.3.8. fs/smb/server/connection.c in ksmbd does not validate the relationship between the NetBIOS header's length field and the SMB header sizes, via pdu_size in ksmbd_conn_handler_loop, leading to an out-of-bounds read.","affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-38431.json","unresolved_ranges":[{"events":[{"introduced":"5.15"},{"fixed":"5.15.145"}]},{"events":[{"introduced":"5.16"},{"fixed":"6.1.34"}]},{"events":[{"introduced":"6.2"},{"fixed":"6.3.8"}]}]}}],"references":[{"type":"ADVISORY","url":"https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.8"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20230824-0011/"},{"type":"FIX","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/smb/server?id=368ba06881c395f1c9a7ba22203cf8d78b4addc0"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"}]}