Deadlock Vulnerability in spi Package

Kernel Updated 02 Oct 2025

Summary

28/10/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1001870: spi: Fix deadlock when adding SPI controllers on SPI buses. Affects Kernel versions < 722ef19a161ce3fffb3d1b01ce2301c306639bdd. No fix is published. How to fix ↓

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Background

The spi package is a component of the Linux Kernel, which provides support for Serial Peripheral Interface (SPI) buses and controllers. SPI is a synchronous serial communication interface commonly used for connecting microcontrollers, sensors, and other devices to a central processing unit (CPU). The spi package in the Linux Kernel allows the addition of SPI controllers on SPI buses, enabling communication between the CPU and connected devices.

Vulnerability Detail

The vulnerability identified as GSD-2021-1001870 in the spi package can lead to a deadlock situation when adding SPI controllers on SPI buses. A deadlock occurs when two or more processes or threads are unable to proceed because each is waiting for the other to release a resource. In this case, the deadlock arises during the process of adding SPI controllers, potentially causing system instability or unresponsiveness. The impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.14.15 or later. The fix for this issue was implemented in commit 722ef19a161ce3fffb3d1b01ce2301c306639bdd of the Linux Kernel repository. Updating to the fixed version ensures that the deadlock situation is resolved and the system remains stable.

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Workaround

No workaround has been provided for this vulnerability.

Conclusion

The spi package in the Linux Kernel is vulnerable to a deadlock issue when adding SPI controllers on SPI buses. This vulnerability can potentially cause system instability or unresponsiveness. It is recommended to update the Linux Kernel to version v5.14.15 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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