Memory Leak in qla2xxx Driver in Linux Kernel
Summary
UVI-2021-1001865: scsi: qla2xxx: Fix a memory leak in an error path of qla2x00_process_els(). Affects Kernel versions >= 8c0eb596baa51f2b43949c698c644727ef17805c, < a7fbb56e6c941d9f59437b96412a348e66388d3e. No fix is published. How to fix ↓
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Background
The qla2xxx driver is a SCSI driver in the Linux Kernel that provides support for QLogic Fibre Channel Host Bus Adapters (HBAs). It allows communication between the operating system and Fibre Channel storage devices. The driver is responsible for handling various SCSI commands and events.
Vulnerability Detail
The qla2xxx driver in the Linux Kernel prior to version 5.14.15 suffers from a memory leak vulnerability in the error path of the qla2x00_process_els() function. This vulnerability was introduced in version 3.11 of the Linux Kernel. An attacker could exploit this vulnerability to cause a denial-of-service condition by repeatedly triggering the error path, leading to the exhaustion of system memory resources. The impact and attack plausibility of this vulnerability have not been proven yet.
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 official fix by updating the Linux Kernel.
Conclusion
The memory leak vulnerability in the qla2xxx driver of the Linux Kernel can be fixed by updating to version 5.14.15 or later. It is important to apply this fix to prevent potential denial-of-service attacks. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The qla2xxx driver is a SCSI driver in the Linux Kernel that provides support for QLogic Fibre Channel Host Bus Adapters (HBAs). It allows communication between the operating system and Fibre Channel storage devices.
The vulnerability can lead to a memory leak in the qla2xxx driver, potentially causing a denial-of-service condition by exhausting system memory resources.
An attacker can exploit this vulnerability by repeatedly triggering the error path of the qla2x00_process_els() function, leading to the accumulation of memory leaks and eventual exhaustion of system memory resources.
No, there is no known workaround for this vulnerability. It is recommended to apply the official fix by updating the Linux Kernel.
You can find more information about this vulnerability in the official Linux Kernel repository and the Cloud Security Alliance's GSD database.
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