Null Pointer Dereference in com20020pci_probe() in net: arcnet: com20020

Kernel Updated 02 Oct 2025

Summary

18/03/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000939: net: arcnet: com20020: Fix null-ptr-deref in com20020pci_probe(). Affects Kernel versions >= 8c14f9c70327a6fb75534c4c61d7ea9c82ccf78f, < 8e3bc7c5bbf87e86e9cd652ca2a9166942d86206. No fix is published. How to fix ↓

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Background

The com20020 driver is responsible for handling communication over the ARCnet network. ARCnet is a local area network (LAN) protocol that was popular in the 1980s and early 1990s. The com20020 driver specifically deals with the com20020 PCI adapter, which allows ARCnet communication over a PCI bus. This vulnerability affects the com20020 driver in the Linux Kernel.

Vulnerability Detail

The vulnerability exists in the com20020pci_probe() function of the com20020 driver in the Linux Kernel. It is caused by a null pointer dereference, which occurs when the driver attempts to access memory using a null pointer. An attacker could exploit this vulnerability by sending specially crafted network packets to a system with a com20020 PCI adapter, leading to a kernel crash or potential privilege escalation. The vulnerability was introduced in version v3.18 of the Linux Kernel and has been fixed in version v4.9.305.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no known workaround for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel.

Conclusion

The com20020 driver in the Linux Kernel is vulnerable to a null pointer dereference in the com20020pci_probe() function. This vulnerability can be fixed by updating the Linux Kernel to version v4.9.305 or later. No known workarounds exist for this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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