Deadlock Vulnerability in Linux Kernel's ksmbd Component - CVE-2023-32253
Summary
CVE-2023-32253: A flaw was found in the Linux kernel's ksmbd component. Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of various operating systems, providing essential services for hardware and software interaction. The ksmbd component enables SMB (Server Message Block) protocol support, allowing file sharing and printing services over a network. This component is crucial for systems that require interoperability with Windows-based systems. However, it is susceptible to vulnerabilities that can lead to service disruptions.
Vulnerability Detail
CVE-2023-32253 is a flaw in the Linux kernel's ksmbd component that triggers a deadlock when multiple concurrent session setup requests are sent. This condition can lead to a denial of service, making the system unresponsive to legitimate requests. The vulnerability originates from improper handling of concurrent requests, which can overwhelm the system's resources. The CVSS score for this vulnerability is 5.9, indicating a moderate severity level.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, you can limit the number of concurrent session setup requests to the ksmbd component to prevent triggering the deadlock. This can be done by configuring the server settings to manage session requests more effectively.
Conclusion
CVE-2023-32253 is a significant vulnerability in the Linux kernel's ksmbd component that can lead to denial of service due to deadlocks from concurrent requests. It is essential to update to the patched versions to mitigate this risk and ensure system stability.
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FAQ
CVE-2023-32253 is a vulnerability in the Linux kernel's ksmbd component that can cause a deadlock, leading to denial of service.
This vulnerability can make your system unresponsive to legitimate requests, disrupting services that rely on the ksmbd component.
The vulnerability affects Debian versions 11, 12, and 13 that utilize the Linux kernel with the ksmbd component.
Yes, patched versions are available for Debian 12 (6.1.37-1) and Debian 13 (6.3.7-1).
You can use Vulert, which monitors open-source vulnerabilities in real-time using a manifest file like package-lock.json. You can also check your application for this specific vulnerability using the Vulert playground without any signup.
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