Vulnerability in Linux Kernel: Staging Greybus UART - Use After Free
Summary
GSD-2021-1001546: staging: greybus: uart: fix tty use after free. Affects Kernel versions >= a18e15175708d39abbe9746ddc3479466b7800c3, < 64062fcaca8872f063ec9da011e7bf30470be33f. 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 a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for hardware management, process scheduling, memory management, and device drivers. The Staging Greybus UART is a subsystem within the Linux Kernel that handles communication with UART devices. UART (Universal Asynchronous Receiver-Transmitter) is a common hardware interface used for serial communication. This vulnerability affects the Staging Greybus UART subsystem and can lead to a use-after-free condition.
Vulnerability Detail
The vulnerability in the Staging Greybus UART subsystem arises from a use-after-free bug. A use-after-free vulnerability occurs when a program continues to use a memory region after it has been freed, leading to potential memory corruption or arbitrary code execution. In this case, the issue arises from improper handling of the TTY (teletypewriter) device associated with the UART. An attacker could exploit this vulnerability by manipulating the TTY device, potentially leading to privilege escalation or denial of service. The impact and attack plausibility of this vulnerability have not been proven yet.
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 Staging Greybus UART subsystem of the Linux Kernel can be mitigated by updating to version v4.14.249 or later. It is crucial to promptly apply the necessary updates to ensure the security and stability of the system. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The Linux Kernel is an open-source operating system kernel that provides essential functionality for various Linux distributions.
The Staging Greybus UART subsystem is a component within the Linux Kernel that handles communication with UART devices.
A use-after-free vulnerability occurs when a program continues to use a memory region after it has been freed, potentially leading to memory corruption or arbitrary code execution.
A TTY (teletypewriter) device is a terminal device that allows input and output between a user and a computer system.
The potential impacts of this vulnerability include privilege escalation and denial of service attacks.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
