Use-after-free vulnerability in net/mlx4_en package

Kernel Updated 02 Oct 2025

Summary

19/12/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1002562: net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc_resources(). Affects Kernel versions >= ec25bc04ed8e12947738468cbe2191f1529f9e39, < 75917372eef0dbfb290ae45474314d35f97aea18. No fix is published. How to fix ↓

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Background

The net/mlx4_en package is a network driver for Mellanox ConnectX-3 and ConnectX-3 Pro Ethernet adapters. It provides support for Mellanox Technologies' 10/40 Gigabit Ethernet adapters and is included in the Linux Kernel. This package enables high-performance networking capabilities for systems utilizing these adapters.

Vulnerability Detail

The vulnerability identified in the net/mlx4_en package is a use-after-free bug in the mlx4_en_try_alloc_resources() function. This bug was introduced in version v4.7 of the Linux Kernel and was fixed in version v5.15.7. The use-after-free bug occurs when the mlx4_en_try_alloc_resources() function attempts to allocate resources but references memory that has already been freed. This can lead to various security issues, including potential remote code execution or denial of service attacks.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no specific workaround mentioned for this vulnerability. The recommended approach is to update the Linux Kernel to the fixed version.

Conclusion

The use-after-free vulnerability in the net/mlx4_en package can lead to serious security issues, such as remote code execution or denial of service attacks. It is crucial to update the Linux Kernel to version v5.15.7 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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