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K
zdiQuentin Minster (@thalium_team)ZDI-23-700
HistoryMay 17, 2023 - 12:00 a.m.

Linux Kernel ksmbd Session NULL Pointer Dereference Denial-of-Service Vulnerability

2023-05-1700:00:00
Quentin Minster (@thalium_team)
www.zerodayinitiative.com
25
linux kernel
ksmbd
null pointer
denial-of-service

EPSS

0.009

Percentile

82.9%

This vulnerability allows remote attackers to create a denial-of-service condition 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 handling of SMB2_LOGOFF commands. The issue results from the lack of proper validation of a pointer prior to accessing it. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.