Kernel Panic Risk in Linux Kernel Due to Mutex Misuse in ptdma Driver
Summary
CVE-2023-53013: In the Linux kernel, the following vulnerability has been resolved: ptdma: pt_core_execute_cmd() should use spinlock The interrupt handler (pt_core_irq_handler()) of the ptdma driver can be called from interrupt context. Affects linux versions < 6.1.11-1. Fixed in 6.1.11-1. How to fix ↓
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Background
The Linux kernel is a core component of many operating systems, providing essential services for hardware and software interaction. The ptdma driver is responsible for managing data transfer in certain hardware contexts. This driver is critical for ensuring efficient communication between devices and the operating system. However, it has been identified that the interrupt handler within this driver can lead to severe issues when not properly managed, particularly in interrupt contexts.
Vulnerability Detail
The vulnerability arises from the ptdma driver's interrupt handler (pt_core_irq_handler()), which can be invoked from an interrupt context. Within this handler, the function pt_core_execute_cmd() attempts to acquire a mutex lock. This is inappropriate in an interrupt context, as it can lead to a kernel panic, causing the system to crash. The issue has been traced back to the misuse of mutexes in a context where spinlocks should be employed, resulting in potential system instability and crashes.
How To Fix
Minimum fixed version
6.1.11-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds available for this vulnerability other than applying the patch. It is recommended to monitor the system for any unusual behavior until the patch is applied.
Conclusion
The CVE-2023-53013 vulnerability in the Linux kernel's ptdma driver poses a significant risk of kernel panic due to improper mutex handling in interrupt contexts. It is crucial to update to the patched version to ensure system stability and security.
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FAQ
CVE-2023-53013 is a vulnerability in the Linux kernel's ptdma driver that can lead to a kernel panic due to improper mutex usage in interrupt contexts.
If exploited, this vulnerability can cause your system to crash, leading to potential data loss and system instability.
Yes, a patch is available in version 6.1.11-1 of the Linux kernel. It is recommended to update to this version or later.
While there are no specific workarounds, it is advisable to monitor your system for any unusual behavior until the patch can be applied.
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