Linux Kernel ksmbd Memory Exhaustion Denial-of-Service Vulnerability
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.
The specific flaw exists within the handling of SMB2_NEGOTIATE commands. The issue results from the lack of memory release after its effective lifetime. 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://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.61
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)
