Advisory Details

July 28th, 2023

Linux Kernel ksmbd Chained Request NULL Pointer Dereference Denial-of-Service Vulnerability

CVE ID	CVE-2023-3866
CVSS SCORE	5.9, AV:N/AC:H/PR:N/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 not required to exploit this vulnerability, but only systems with ksmbd enabled are vulnerable. The specific flaw exists within the handling of chained requests. The issue results from dereferencing a NULL pointer. 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://lore.kernel.org/all/20230626180806.105257976@linuxfoundation.org/
DISCLOSURE TIMELINE	2023-06-13 - Vulnerability reported to vendor 2023-07-28 - Coordinated public release of advisory 2024-04-17 - Advisory Updated
CREDIT	8437438cb38d8565e9a990474a7b8d2b3e3770a521eb159325e93c6189f526d1

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