erspan: Do Not Assume Transport Header is Always Set

Kernel Updated 02 Oct 2025

Summary

31/07/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1004469: erspan: do not assume transport header is always set. Affects Kernel versions >= d5db21a3e6977dcb42cee3d16cd69901fa66510a, < a3b2470399f679587c45abe56e551caf10becca2. No fix is published. How to fix ↓

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Background

The erspan package is a component of the Linux Kernel ecosystem. It provides functionality for encapsulating Ethernet frames in IP packets for network monitoring purposes. ERSPAN (Encapsulated Remote SPAN) is a protocol that allows the mirroring of network traffic from one switch port to another across an IP network. This feature is commonly used for network troubleshooting and analysis. However, a vulnerability has been discovered in the erspan package that can lead to potential security risks.

Vulnerability Detail

The vulnerability in erspan arises from an assumption made by the code that the transport header is always set. This assumption can be exploited by an attacker to manipulate the behavior of the system. The impact and attack plausibility of this vulnerability have not been proven yet. However, if successfully exploited, it could potentially lead to unauthorized access, data leakage, or other security breaches. The vulnerability was introduced in version v4.18 of the Linux Kernel and has been fixed in version v5.15.51.

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 v5.15.51 or later. This update includes the necessary patch to address the issue. It is important to regularly update the kernel to ensure the latest security fixes are applied.

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Workaround

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

Conclusion

The erspan package in the Linux Kernel is vulnerable to an issue that can be exploited by attackers. It is crucial to update the kernel to the fixed version to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.

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