net_sched: NULL dereference in fifo_set_limit()
Summary
GSD-2021-1001628: net_sched: fix NULL deref in fifo_set_limit(). Affects Kernel versions >= fb0305ce1b03f6ff17f84f2c63daccecb45f2805, < acff2d182c0768a713cee77442caeb07668bd68f. No fix is published. How to fix ↓
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Background
The net_sched package is a component of the Linux Kernel that provides network traffic control and queuing functionality. It allows for the prioritization and management of network packets. The vulnerability in question, identified as GSD-2021-1001628, involves a NULL dereference issue in the fifo_set_limit() function of net_sched. This vulnerability can potentially be exploited by an attacker to cause a denial-of-service condition or execute arbitrary code.
Vulnerability Detail
The vulnerability arises from a NULL pointer dereference in the fifo_set_limit() function of net_sched. This occurs when the function is called with a NULL pointer as an argument, leading to a crash or potential code execution. The impact and attack plausibility of this vulnerability have not been proven yet. It was introduced in Linux Kernel version v2.6.27 and has been fixed in version v5.10.73 by commit acff2d182c0768a713cee77442caeb07668bd68f.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The NULL dereference vulnerability in net_sched's fifo_set_limit() function can potentially lead to a denial-of-service condition or code execution. It is crucial to update the Linux Kernel to version v5.10.73 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
net_sched is a component of the Linux Kernel that provides network traffic control and queuing functionality. It allows for the prioritization and management of network packets.
A NULL dereference occurs when a program attempts to access or manipulate memory using a NULL pointer, resulting in a crash or potential code execution.
The impact of this vulnerability can range from a denial-of-service condition to potential code execution, depending on how it is exploited.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.10.73 or later. Instructions for updating can be found in the 'how_to_fix' section of this report.
No specific workaround has been mentioned for this vulnerability.
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