Vulnerability in Linux Kernel: scsi: core: Fix bad pointer dereference when ehandler kthread is invalid
Summary
GSD-2021-1001286: scsi: core: Fix bad pointer dereference when ehandler kthread is invalid. Affects Kernel versions >= 7a696ce1d5d16a33a6cd6400bbcc0339b2460e11, < ea518b70ed5e4598c8d706f37fc16f7b06e440bd. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing essential functionality. The scsi (Small Computer System Interface) subsystem is a part of the Linux Kernel that handles SCSI devices, such as hard drives and tape drives. It provides a standardized interface for communication between the operating system and these devices. However, a vulnerability has been discovered in the scsi core component that can lead to a bad pointer dereference when the error handler (ehandler) kthread is invalid.
Vulnerability Detail
The vulnerability arises from a bad pointer dereference in the scsi core component when the ehandler kthread is invalid. This can occur when the ehandler kthread is not properly initialized or has been freed prematurely. An attacker could exploit this vulnerability by triggering a specific error condition that causes the ehandler kthread to become invalid, leading to a kernel crash or potential privilege escalation. The impact and attack plausibility of this vulnerability have not yet been proven.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
The vulnerability in the scsi core component of the Linux Kernel has been identified and fixed in version v5.10.52. Users are advised to update their Linux Kernel to the latest version to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing essential functionality.
The scsi (Small Computer System Interface) subsystem is a part of the Linux Kernel that handles SCSI devices, such as hard drives and tape drives. It provides a standardized interface for communication between the operating system and these devices.
A bad pointer dereference occurs when a program tries to access memory using a pointer that is either uninitialized or has been freed prematurely. This can lead to crashes, data corruption, or potential security vulnerabilities.
An ehandler kthread is a kernel thread responsible for handling error conditions in the scsi subsystem. It is designed to handle specific error scenarios and take appropriate actions to recover or report the error.
An attacker can exploit this vulnerability by triggering a specific error condition that causes the ehandler kthread to become invalid. This can be done through malicious input or by exploiting other vulnerabilities in the system.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
