Out-of-Bounds Read Vulnerability in net/smc Package

Kernel Updated 02 Oct 2025

Summary

24/04/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000981: net/smc: use memcpy instead of snprintf to avoid out of bounds read. Affects Kernel versions >= a3db10efcc4cc9c03a6375920179ade75ea2df7a, < 8a4465368964b4fbaf084760c94c7aabf61059fb. No fix is published. How to fix ↓

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Background

The net/smc package is a part of the Linux Kernel ecosystem. It provides support for the SMC (System Management Controller) protocol, which enables communication between systems in a cluster. The package includes various functions and data structures for managing SMC connections. However, a vulnerability has been discovered in the package that can lead to an out-of-bounds read.

Vulnerability Detail

The vulnerability in the net/smc package arises from the use of snprintf instead of memcpy in a specific code section. This can result in an out-of-bounds read, potentially leading to information disclosure or a crash. The vulnerability was introduced in version v5.11 of the Linux Kernel and has been fixed in version v5.11 by commit 8a4465368964b4fbaf084760c94c7aabf61059fb. 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 v5.11 or later. This can be done by pulling the latest changes from the official Linux Kernel repository using the following command:

$ git pull https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

After updating, recompile and reinstall the Kernel to ensure the fix is applied.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The net/smc package in the Linux Kernel is vulnerable to an out-of-bounds read issue, which can have serious consequences such as information disclosure or crashes. It is crucial to update the Kernel to version v5.11 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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