Critical Vulnerability in Linux Kernel: Aspeed LPC Snoop Channel Management
Summary
CVE-2025-38487: In the Linux kernel, the following vulnerability has been resolved: soc: aspeed: lpc-snoop: Don't disable channels that aren't enabled Mitigate e.g. 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 the Linux operating system, responsible for managing hardware resources and providing essential services to applications. It is widely used in various environments, from servers to embedded systems. The kernel's stability and security are paramount, as vulnerabilities can lead to severe system failures or security breaches. This specific vulnerability affects the Aspeed LPC Snoop driver, which is responsible for managing communication with certain hardware components.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified within the Aspeed LPC Snoop driver. This issue arises when the system attempts to disable channels that are not enabled, leading to a kernel NULL pointer dereference. The vulnerability can cause system crashes and instability, particularly in ARM architectures. The error manifests when the driver is unbound, resulting in an internal error that can compromise the system's functionality.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can avoid unbinding the LPC Snoop driver if it is not necessary. If unbinding is required, ensure that the channels are enabled before performing the operation. The command to unbind the driver is as follows: 'echo 1e789080.lpc-snoop > /sys/bus/platform/drivers/aspeed-lpc-snoop/unbind'. However, exercise caution as this may still lead to system instability.
Conclusion
The CVE-2025-38487 vulnerability in the Linux kernel's Aspeed LPC Snoop driver poses a significant risk to system stability. Users are encouraged to update their kernels to the latest versions to mitigate this issue. Temporary workarounds are available, but they do not replace the need for a proper fix.
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FAQ
CVE-2025-38487 is a vulnerability in the Linux kernel's Aspeed LPC Snoop driver that can lead to system crashes due to a NULL pointer dereference.
This vulnerability can cause instability and crashes in systems using the affected Linux kernel versions, particularly on ARM architectures.
Yes, users are advised to update their Linux kernel to the latest patched version to mitigate this vulnerability.
As a temporary measure, avoid unbinding the LPC Snoop driver unless necessary, and ensure that channels are enabled before performing any operations.
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