UAF Vulnerability in net: qcom/emac
Summary
GSD-2021-1001441: net: qcom/emac: fix UAF in emac_remove. Affects Kernel versions >= 54e19bc74f3380d414681762ceed9f7245bc6a6e, < 4d04a42b926e682140776e54188f4a44f1f01a81. No fix is published. How to fix ↓
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Background
The net: qcom/emac package is a component of the Linux Kernel, specifically designed for Qualcomm Ethernet MAC (Media Access Control) controllers. It provides the necessary drivers and functionality for these controllers to operate within the Linux operating system. The package is responsible for managing the communication between the Ethernet hardware and the kernel, enabling network connectivity for Qualcomm devices.
Vulnerability Detail
The UAF (Use-After-Free) vulnerability in the net: qcom/emac package occurs in the emac_remove function. This vulnerability allows an attacker to exploit a use-after-free condition, where a reference to a freed memory object is still being used. By manipulating this vulnerability, an attacker can potentially execute arbitrary code or cause a denial-of-service (DoS) condition. The vulnerability was introduced in version v4.9 of the Linux Kernel by commit 54e19bc74f3380d414681762ceed9f7245bc6a6e and is fixed in version v4.9.277 by commit 4d04a42b926e682140776e54188f4a44f1f01a81.
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 crucial to apply the fix by updating the Linux Kernel to a patched version.
Conclusion
The UAF vulnerability in the net: qcom/emac package can be mitigated by updating the Linux Kernel to version v4.9.277 or later. It is crucial to promptly apply the fix to ensure the security and stability of systems utilizing the affected package. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The net: qcom/emac package is a component of the Linux Kernel that provides drivers and functionality for Qualcomm Ethernet MAC controllers.
A UAF (Use-After-Free) vulnerability occurs when a program continues to use a memory object after it has been freed, potentially leading to arbitrary code execution or a denial-of-service condition.
This vulnerability could allow an attacker to execute arbitrary code or cause a denial-of-service condition on systems using the affected version of the Linux Kernel.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.9.277 or later.
No, there is no known workaround for this vulnerability. It is essential to apply the fix by updating the Linux Kernel.
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