USB Null Pointer Dereference Vulnerability in Linux Kernel
Summary
GSD-2021-1000956: usb: fix various gadgets null ptr deref on 10gbps cabling. Affects Kernel versions >= eaef50c760576bca70b87fdc26eb87a3660529f8, < 4b289a0f3033f465b4fd51ba995251a7867a2aa2. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for hardware abstraction, process management, memory management, and device drivers. The USB subsystem in the Linux Kernel enables communication with USB devices and supports various USB gadget drivers. However, a vulnerability has been discovered in the USB subsystem that can lead to null pointer dereference when using 10Gbps cabling.
Vulnerability Detail
The USB null pointer dereference vulnerability in the Linux Kernel occurs when certain USB gadgets are used with 10Gbps cabling. This vulnerability can be exploited by an attacker to cause a denial-of-service condition or potentially execute arbitrary code with kernel privileges. The null pointer dereference occurs due to a programming error in the USB gadget drivers, which fails to handle certain conditions properly. An attacker with physical access to a vulnerable system or the ability to connect malicious USB devices could trigger this vulnerability. It is important to note that 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 specific workaround provided for this vulnerability. However, users can minimize the risk by avoiding the use of 10Gbps cabling with USB gadgets until the Linux Kernel is updated to a fixed version.
Conclusion
The USB null pointer dereference vulnerability in the Linux Kernel can pose a significant security risk, potentially leading to a denial-of-service condition or arbitrary code execution. It is crucial to update the Linux Kernel to the latest version (v5.10.44 or later) to mitigate this vulnerability. Regularly updating the kernel is essential to ensure the application of necessary security patches. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The USB null pointer dereference vulnerability can lead to a denial-of-service condition or potential execution of arbitrary code with kernel privileges.
An attacker with physical access to a vulnerable system or the ability to connect malicious USB devices could trigger this vulnerability.
The actual impact and attack plausibility of this vulnerability have not yet been proven.
To fix this vulnerability, update the Linux Kernel to version v5.10.44 or later.
While there is no specific workaround provided, users can minimize the risk by avoiding the use of 10Gbps cabling with USB gadgets.
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