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zdiQuentin Minster (@thalium_team)ZDI-23-695
HistoryMay 17, 2023 - 12:00 a.m.

Linux Kernel ksmbd Session Setup Memory Exhaustion Denial-of-Service Vulnerability

2023-05-1700:00:00
Quentin Minster (@thalium_team)
www.zerodayinitiative.com
13
vulnerability
remote attackers
denial-of-service
linux kernel
ksmbd
smb2_session_setup
resource consumption

0.004 Low

EPSS

Percentile

74.5%

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_SESSION_SETUP commands. The issue results from the lack of control of resource consumption. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.