NPD bug in sl_tx_timeout() in Linux Kernel
Summary
GSD-2022-1001651: drivers: net: slip: fix NPD bug in sl_tx_timeout(). Affects Kernel versions < efb020924a71391fc12e6f204eaf25694cc116a1. No fix is published. How to fix ↓
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Background
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware. The slip driver in the kernel is used for Serial Line IP (SLIP) protocol support, which allows for point-to-point communication over serial lines. The sl_tx_timeout() function in the slip driver is responsible for handling transmission timeouts. However, a bug in this function can lead to a null pointer dereference (NPD) vulnerability.
Vulnerability Detail
The NPD bug in sl_tx_timeout() can be triggered when a transmission timeout occurs. If the function is called with a null pointer, it can result in a kernel crash or other unpredictable behavior. An attacker may be able to exploit this vulnerability to cause a denial-of-service (DoS) attack or potentially execute arbitrary code with kernel privileges. 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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Conclusion
The NPD bug in sl_tx_timeout() in the Linux Kernel can lead to a null pointer dereference vulnerability, which may result in a kernel crash or other unpredictable behavior. It is recommended to update the Linux Kernel to version v5.15.35 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware.
The slip driver in the Linux Kernel is used for Serial Line IP (SLIP) protocol support, which allows for point-to-point communication over serial lines.
The sl_tx_timeout() function in the slip driver is responsible for handling transmission timeouts.
A null pointer dereference (NPD) vulnerability occurs when a program attempts to access or manipulate memory using a null pointer, leading to a crash or other unpredictable behavior.
An attacker may be able to exploit this vulnerability to cause a denial-of-service (DoS) attack or potentially execute arbitrary code with kernel privileges.
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