CVSS 3.1 Score 9.1 of 10 (high)


Published Jul 18, 2023
Updated: Dec 15, 2023
CWE ID 125


CVE-2023-38431 is a critical vulnerability that affects the Linux kernel before version 6.3.8. The vulnerability exists in the fs/smb/server/connection.c file in ksmbd, which fails to validate the relationship between the NetBIOS header's length field and the SMB header sizes. This can lead to an out-of-bounds read through pdu_size in ksmbd_conn_handler_loop. The vulnerability has a base severity score of 9.1, indicating its critical nature. It does not require any privileges or user interaction to exploit and can be exploited over a network. The potential danger it poses to an organization is high, as it can result in unauthorized access and disclosure of confidential information. To remediate this vulnerability, organizations should update their Linux kernel to version 6.3.8 or later.

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