Out-of-Bounds Access Vulnerability in spi: bcm2835

Kernel Updated 02 Oct 2025

Summary

30/06/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1000944: spi: bcm2835: Fix out-of-bounds access with more than 4 slaves. Affects Kernel versions >= 571e31fa60b3697d5db26140e16d5c45c51c9815, < 82a8ffba54d31e97582051cb56ba1f988018681e. No fix is published. How to fix ↓

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Background

The spi: bcm2835 package is a driver for the SPI controller found on Broadcom BCM2835-based systems, such as the Raspberry Pi. It provides functionality for communicating with SPI devices connected to the system. The vulnerability in this package allows for out-of-bounds access when more than 4 slaves are used.

Vulnerability Detail

The vulnerability in spi: bcm2835 arises from an out-of-bounds access issue that occurs when the number of slaves exceeds 4. This can lead to memory corruption and potentially allow an attacker to execute arbitrary code or cause a denial-of-service condition. The vulnerability was introduced in version v5.4 of the Linux Kernel and is fixed in version v5.10.44. 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 v5.10.44 or later. This can be done by pulling the latest updates from the official Linux Kernel repository and rebuilding the kernel. Alternatively, users can wait for their distribution to release an updated kernel package.

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Workaround

There is no known workaround for this vulnerability at the moment.

Conclusion

The out-of-bounds access vulnerability in spi: bcm2835 can lead to memory corruption and potential code execution or denial-of-service attacks. It is recommended to update the Linux Kernel to version v5.10.44 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.

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