{"id":"CVE-2023-52442","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: validate session id and tree id in compound request\n\n`smb2_get_msg()` in smb2_get_ksmbd_tcon() and smb2_check_user_session()\nwill always return the first request…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: validate session id and tree id in compound request\n\n`smb2_get_msg()` in smb2_get_ksmbd_tcon() and smb2_check_user_session()\nwill always return the first request…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.15, < 5.15.145","linux_kernel >= 5.16, < 6.1.53","linux_kernel >= 6.2, < 6.4.16","linux_kernel = 6.5"],"patched":["linux_kernel 6.4.16"],"published":"2024-02-21","updated":"2026-08-04","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-52442","references":[{"url":"https://git.kernel.org/stable/c/017d85c94f02090a87f4a473dbe0d6ee0da72693","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3df0411e132ee74a87aa13142dfd2b190275332e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4c2b350b2e269e3fd17bbfa42de1b42775b777ac","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/becb5191d1d5fdfca0198a2e37457bbbf4fe266f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/017d85c94f02090a87f4a473dbe0d6ee0da72693","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/3df0411e132ee74a87aa13142dfd2b190275332e","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/4c2b350b2e269e3fd17bbfa42de1b42775b777ac","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/becb5191d1d5fdfca0198a2e37457bbbf4fe266f","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.29644,"epssPercentile":0.98131,"ingestedAt":"2026-08-04T10:39:37.672Z","slug":"CVE-2023-52442","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: validate session id and tree id in compound request\n\n`smb2_get_msg()` in smb2_get_ksmbd_tcon() and smb2_check_user_session()\nwill always return the first request smb2 header in a compound request.\nif `SMB2_TREE_CONNECT_HE` is the first command in compound request, will\nreturn 0, i.e. The tree id check is skipped.\nThis patch use ksmbd_req_buf_next() to get current command in compound.\n\n## Affected\n\n- `linux_kernel >= 5.15, < 5.15.145`\n- `linux_kernel >= 5.16, < 6.1.53`\n- `linux_kernel >= 6.2, < 6.4.16`\n- `linux_kernel = 6.5`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.4.16`","depth":"midnight","depthScore":56,"depthScoreParts":{"impact":50.1,"likelihood":5.9,"exploitation":0,"ransomware":0},"changes":[{"seq":108,"id":"CVE-2023-52442","ts":1785872056525,"field":"epss","old":"0.17442","new":"0.29644"}]}