{"id":"CVE-2023-52440","summary":"ksmbd: fix slub overflow in ksmbd_decode_ntlmssp_auth_blob()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix slub overflow in ksmbd_decode_ntlmssp_auth_blob()\n\nIf authblob-\u003eSessionKey.Length is bigger than session key\nsize(CIFS_KEY_SIZE), slub overflow can happen in key exchange codes.\ncifs_arc4_crypt copy to session key array from SessionKey from client.","modified":"2026-08-17T03:36:30.822081406Z","published":"2024-02-21T07:21:00.438Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52440.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/30fd6521b2fbd9b767e438e31945e5ea3e3a2fba"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4b081ce0d830b684fdf967abc3696d1261387254"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7f1d6cb0eb6af3a8088dc24b7ddee9a9711538c4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bd554ed4fdc3d38404a1c43d428432577573e809"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ecd7e1c562cb08e41957fcd4b0e404de5ab38e20"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52440.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52440"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c5049d2d73b2dc8e6bb64be633250bad1ae3d9ef"},{"fixed":"bd554ed4fdc3d38404a1c43d428432577573e809"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f9929ef6a2a55f03aac61248c6a3a987b8546f2a"},{"fixed":"30fd6521b2fbd9b767e438e31945e5ea3e3a2fba"},{"fixed":"7f1d6cb0eb6af3a8088dc24b7ddee9a9711538c4"},{"fixed":"ecd7e1c562cb08e41957fcd4b0e404de5ab38e20"},{"fixed":"4b081ce0d830b684fdf967abc3696d1261387254"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52440.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.17.0"},{"fixed":"6.1.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.4.15"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.5.0"},{"fixed":"6.5.2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52440.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}