Advisory Details

December 22nd, 2022

Linux Kernel ksmbd Heap-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2022-47942
CVSS SCORE	8.5, AV:N/AC:H/PR:L/UI:N/S:C/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 required to exploit this vulnerability. The specific flaw exists within the handling of file attributes. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. 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://lore.kernel.org/lkml/20220819153711.847846093@linuxfoundation.org/
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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