Use after free vulnerability in scsi: libfc

Kernel Updated 02 Oct 2025

Summary

24/04/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1002193: scsi: libfc: Fix use after free in fc_exch_abts_resp(). Affects Kernel versions < 5cf2ce8967b0d98c8cfa4dc42ef4fcf080f5c836. No fix is published. How to fix ↓

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Background

The scsi: libfc is a component of the Linux Kernel that provides support for Fibre Channel (FC) transport protocol. It is responsible for handling FC exchanges and managing FC fabric services. The vulnerability identified in this component can lead to a use after free condition, which occurs when a program continues to use a memory address after it has been freed. This can result in various security issues, including potential code execution or system crashes.

Vulnerability Detail

The use after free vulnerability in fc_exch_abts_resp() function of scsi: libfc can be exploited by an attacker to execute arbitrary code or cause a denial of service (DoS) condition. The vulnerability arises due to improper handling of FC exchanges, leading to a situation where a memory address is accessed after it has been freed. By carefully crafting malicious FC exchanges, an attacker can trigger this vulnerability and potentially gain control over the affected system.

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 v5.4.189 or later. This fix can be obtained by applying commit 5cf2ce8967b0d98c8cfa4dc42ef4fcf080f5c836 from the official Linux Kernel repository. By updating to the patched version, the use after free vulnerability in scsi: libfc will be addressed.

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Workaround

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

Conclusion

The use after free vulnerability in scsi: libfc can have severe security implications, including potential code execution or system crashes. It is crucial to update the Linux Kernel to the recommended version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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