Advisory Details

December 22nd, 2022

Linux Kernel ksmbd Out-Of-Bounds Read Denial-of-Service Vulnerability

CVE ID	CVE-2022-47938
CVSS SCORE	6.5, AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AFFECTED VENDORS	Linux
AFFECTED PRODUCTS	Kernel
VULNERABILITY DETAILS	This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Linux Kernel. Authentication is required to exploit this vulnerability. The specific flaw exists within the handling of SMB2_TREE_CONNECT commands. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
ADDITIONAL DETAILS	Linux has issued an update to correct this vulnerability. More details can be found at: https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.61
DISCLOSURE TIMELINE	2022-07-26 - Vulnerability reported to vendor 2022-12-22 - Coordinated public release of advisory 2023-01-23 - Advisory Updated
CREDIT	Arnaud Gatignol, Quentin Minster, Florent Saudel, Guillaume Teissier (@thalium_team)

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