Out-of-Bound Array Access in net: tulip: de4x5

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-2021-1002442: net: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound. Affects Kernel versions < 77ff166909458646e66450e42909e0adacc99049. No fix is published. How to fix ↓

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Background

The net: tulip: de4x5 package is a network driver in the Linux Kernel. It provides support for certain network interface cards (NICs) based on the DECchip 21140 Ethernet controller. The package includes code for handling the communication between the NIC and the operating system. However, a vulnerability has been discovered in the package that allows for out-of-bound array access.

Vulnerability Detail

The vulnerability in net: tulip: de4x5 arises from a problem with the 'lp->phy[8]' array. This array is accessed without proper bounds checking, which can lead to memory corruption or other unexpected behavior. An attacker could potentially exploit this vulnerability to execute arbitrary code, escalate privileges, or cause a denial-of-service condition. 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 v5.4.164 or later. This fix is implemented in commit 77ff166909458646e66450e42909e0adacc99049. Updating the kernel will ensure that the array access is properly bounded and prevent potential exploitation of the vulnerability.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The net: tulip: de4x5 package in the Linux Kernel is vulnerable to an out-of-bound array access issue. To mitigate this vulnerability, it is recommended to update the kernel to version v5.4.164 or later. For further support on vulnerability remediation, please contact DevNack.com.

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