Null Pointer Dereference in net/x25 Package
Summary
GSD-2022-1002061: net/x25: Fix null-ptr-deref caused by x25_disconnect. Affects Kernel versions >= 4becb7ee5b3d2829ed7b9261a245a77d5b7de902, < 5c94b6205e87411dbe9dc1ca088eb36b8837fb47. No fix is published. How to fix ↓
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Background
The net/x25 package is a part of the Linux Kernel ecosystem and is responsible for handling X.25 network protocol connections. X.25 is a widely used protocol suite for packet-switched networks. The net/x25 package provides the necessary functionality to establish and manage X.25 connections within the Linux Kernel.
Vulnerability Detail
The vulnerability identified in the net/x25 package is a null pointer dereference issue that occurs during the x25_disconnect operation. This vulnerability was introduced in version v5.7 of the Linux Kernel by commit 4becb7ee5b3d2829ed7b9261a245a77d5b7de902. It was fixed in version v5.10.110 by commit 5c94b6205e87411dbe9dc1ca088eb36b8837fb47. A null pointer dereference occurs when a program attempts to access or dereference a null pointer, leading to a crash or potential code execution. Exploiting this vulnerability could allow an attacker to cause a denial-of-service condition or potentially execute arbitrary code within the kernel context.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been provided for this vulnerability.
Conclusion
The net/x25 package in the Linux Kernel is vulnerable to a null pointer dereference issue during the x25_disconnect operation. This vulnerability can be fixed by updating the Linux Kernel to version v5.10.110 or later. Users can also check if their application is affected by this vulnerability using Vulert Playground (https://vulert.com/scanner). For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The net/x25 package is a component of the Linux Kernel that handles X.25 network protocol connections.
A null pointer dereference occurs when a program attempts to access or dereference a null pointer, leading to a crash or potential code execution.
Exploiting this vulnerability could allow an attacker to cause a denial-of-service condition or potentially execute arbitrary code within the kernel context.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.10.110 or later.
No specific workaround has been provided for this vulnerability.
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