net/smc: Fix NULL pointer dereference in smc_pnet_find_ib()

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-2022-1001656: net/smc: Fix NULL pointer dereference in smc_pnet_find_ib(). Affects Kernel versions >= af5f60c7e3d593c2fa31b9a62c16eae75f074de3, < 3a523807f01455fe9a0c1a433f27cd4411ee400f. 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 is used for communication between systems. The smc_pnet_find_ib() function is responsible for finding the InfiniBand (IB) device associated with a given SMC PNET ID. However, a vulnerability in this function can lead to a NULL pointer dereference.

Vulnerability Detail

The vulnerability in net/smc's smc_pnet_find_ib() function allows an attacker to trigger a NULL pointer dereference, resulting in a system crash or potential privilege escalation. This vulnerability was introduced in Linux Kernel version v5.1 and was fixed in version v5.15.35. 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, update the Linux Kernel to version v5.15.35 or later. This update includes the commit 3a523807f01455fe9a0c1a433f27cd4411ee400f, which addresses the NULL pointer dereference issue in smc_pnet_find_ib().

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Conclusion

The net/smc package in the Linux Kernel is vulnerable to a NULL pointer dereference in the smc_pnet_find_ib() function. To mitigate this vulnerability, it is recommended to update the Linux Kernel to version v5.15.35 or later. For further support on vulnerability remediation, contact DevNack.com.

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