Advisory Details

   February 23rd, 2024

Linux Kernel ksmbd TCP Connection Race Condition Remote Code Execution Vulnerability

  ZDI-24-195
  ZDI-CAN-22991

   CVE ID                CVE-2024-26592
   CVSS SCORE            9.0, AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
   AFFECTED VENDORS      Linux
   AFFECTED PRODUCTS     Kernel
                         This vulnerability allows remote attackers to execute arbitrary code on affected installations of Linux Kernel. Authentication is not required to exploit this vulnerability. However, only systems with ksmbd enabled are vulnerable.
   VULNERABILITY DETAILS
                         The specific flaw exists within the handling of TCP connection and disconnection. 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/38d20c62903d669693a1869aa68c4dd5674e2544
   DISCLOSURE TIMELINE     • 2024-01-11 - Vulnerability reported to vendor
                           • 2024-02-23 - Coordinated public release of advisory
   CREDIT                fffvr