Use-after-free vulnerability in net: dsa: mv88e6xxx

Kernel Updated 02 Oct 2025

Summary

27/02/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000520: net: dsa: mv88e6xxx: fix use-after-free in mv88e6xxx_mdios_unregister. Affects Kernel versions >= 1b451c3994a2d322f8e55032c62c8b47b7d95900, < 402888280890bceb19e96733dc44792ebfdcd62d. No fix is published. How to fix ↓

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Background

The net: dsa: mv88e6xxx package is a component of the Linux Kernel that provides support for Marvell 88E6xxx Ethernet switches. These switches are commonly used in network infrastructure devices. The package includes drivers and functions that enable communication with the switch hardware. However, a use-after-free vulnerability has been discovered in the mv88e6xxx_mdios_unregister function of this package.

Vulnerability Detail

The use-after-free vulnerability in net: dsa: mv88e6xxx arises when the mv88e6xxx_mdios_unregister function is called. This function is responsible for unregistering the MDIO bus used by the Marvell Ethernet switch. However, due to a programming error, the function does not properly handle the deallocation of resources, leading to a use-after-free condition. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service condition on a vulnerable system.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

No workaround has been provided for this vulnerability.

Conclusion

In conclusion, the net: dsa: mv88e6xxx package in the Linux Kernel is vulnerable to a use-after-free issue in the mv88e6xxx_mdios_unregister function. This vulnerability can be mitigated by updating the kernel to version v5.16.10 or later. For further support and assistance in vulnerability remediation, please contact DevNack.com.

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