Vulnerability in Bluetooth cmtp in Linux Kernel
Summary
GSD-2021-1000676: Bluetooth: cmtp: fix file refcount when cmtp_attach_device fails. Affects Kernel versions < 6f6ac2a7959b1864886d07fcf3b9cec587dfe635. 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
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
Background
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing essential services. Bluetooth is a wireless technology used for short-range communication between devices. The cmtp module in the Linux Kernel is responsible for handling the Bluetooth Cable Replacement Protocol (CMTP). It allows devices to emulate a serial port over Bluetooth for file transfer. However, a vulnerability has been discovered in the cmtp module that can lead to a file reference count issue.
Vulnerability Detail
The vulnerability in the cmtp module occurs when cmtp_attach_device fails. This failure results in a file reference count not being properly handled, leading to a potential resource leak. An attacker could exploit this vulnerability to exhaust system resources, causing a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability was introduced in an unknown version of the Linux Kernel and has been fixed in version v4.14.235 by commit 6f6ac2a7959b1864886d07fcf3b9cec587dfe635.
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
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, a vulnerability has been discovered in the Bluetooth cmtp module in the Linux Kernel. This vulnerability can potentially lead to a denial-of-service condition. It is crucial to update the Linux Kernel to the fixed version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The impact of this vulnerability is a potential denial-of-service condition, where an attacker can exhaust system resources.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and it will alert you in real-time if any open-source vulnerabilities, including this one, are found.
No, there is currently no known exploit for this vulnerability.
The remote exploitability of this vulnerability has not been determined yet.
The recommended mitigation is to update the Linux Kernel to the fixed version mentioned earlier.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
