Advisory Details

May 17th, 2023

Linux Kernel ksmbd Tree Connection Race Condition Remote Code Execution Vulnerability

CVE ID	CVE-2023-32254
CVSS SCORE	9.8, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Linux
AFFECTED PRODUCTS	Kernel
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on affected installations of Linux Kernel. Authentication is not required to exploit this vulnerability, but only systems with ksmbd enabled are vulnerable. The specific flaw exists within the processing of SMB2_TREE_DISCONNECT commands. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to execute code in the context of the kernel.
ADDITIONAL DETAILS	Linux has issued an update to correct this vulnerability. More details can be found at: https://github.com/torvalds/linux/commit/30210947a343b6b3ca13adc9bfc88e1543e16dd5
DISCLOSURE TIMELINE	2023-04-27 - Vulnerability reported to vendor 2023-05-17 - Coordinated public release of advisory
CREDIT	Quentin Minster (@thalium_team)

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