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Vulnerability record · CVE-2023-52442 · published 21 February 2024

CVE-2023-52442: Linux kernel vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in compound request `smb2_get_msg()` in smb2_get_ksmbd_tcon() and smb2_check_user_session() will always return the first request smb2 header in a compound request. if `SMB2_TREE_CONNECT_HE` is the first command in compound request, will return 0, i.e. The tree id check is skipped. This patch use ksmbd_req_buf_next() to get current command in compound.

5.5 CVSS 3.1 Medium EPSS 30% · top 1.9%
5.5CVSS 3.1 base score
30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
4 Aug 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in compound request `smb2_get_msg()` in smb2_get_ksmbd_tcon() and smb2_check_user_session() will always return the first request smb2 header in a compound request. if `SMB2_TREE_CONNECT_HE` is the first command in compound request, will return 0, i.e. The tree id check is skipped. This patch use ksmbd_req_buf_next() to get current command in compound.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/017d85c94f02090a87f4a473dbe0d6ee0da72693 Patch
https://git.kernel.org/stable/c/3df0411e132ee74a87aa13142dfd2b190275332e Patch
https://git.kernel.org/stable/c/4c2b350b2e269e3fd17bbfa42de1b42775b777ac Patch
https://git.kernel.org/stable/c/becb5191d1d5fdfca0198a2e37457bbbf4fe266f Patch
https://git.kernel.org/stable/c/017d85c94f02090a87f4a473dbe0d6ee0da72693 Patch
https://git.kernel.org/stable/c/3df0411e132ee74a87aa13142dfd2b190275332e Patch
https://git.kernel.org/stable/c/4c2b350b2e269e3fd17bbfa42de1b42775b777ac Patch
https://git.kernel.org/stable/c/becb5191d1d5fdfca0198a2e37457bbbf4fe266f Patch

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Source: NIST National Vulnerability Database (record CVE-2023-52442), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.