Data Race Vulnerability in Linux Kernel
Summary
GSD-2022-1004352: tcp: Fix a data-race around sysctl_tcp_mtu_probe_floor. Affects Kernel versions >= c04b79b6cfd714144f6a2cf359603d82ee631e62, < cc36c37f5fe066c4708e623ead96dc8f57224bf5. 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 an interface for applications to interact with the hardware. It is a widely used open-source package that powers numerous devices and servers. The vulnerability identified in this report relates to the TCP module of the Linux Kernel.
Vulnerability Detail
The vulnerability in the TCP module of the Linux Kernel involves a data race around the sysctl_tcp_mtu_probe_floor function. A data race occurs when multiple threads or processes access shared data concurrently without proper synchronization, leading to unpredictable behavior and potential security vulnerabilities. In this case, the data race can be exploited by an attacker to manipulate the sysctl_tcp_mtu_probe_floor value, potentially causing network performance issues or even remote code execution. The vulnerability was introduced in version v5.4 of the Linux Kernel and has been fixed in version v5.15.58.
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
As a temporary workaround, users can manually apply the patch provided in the fix commit (cc36c37f5fe066c4708e623ead96dc8f57224bf5) to their existing kernel source code. The patch can be obtained from the Linux Kernel repository. However, it is strongly recommended to update to the latest stable version of the Linux Kernel as soon as possible.
Conclusion
In conclusion, a data race vulnerability has been identified in the TCP module of the Linux Kernel. This vulnerability can be mitigated by updating the Linux Kernel to version v5.15.58 or later. Users can also apply the provided patch as a temporary workaround. For further support and assistance in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The vulnerability can be exploited by an attacker to manipulate the sysctl_tcp_mtu_probe_floor value, potentially causing network performance issues or even remote code execution.
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 Vulert will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there is no known public exploit for this vulnerability. However, it is important to apply the fix or update the Linux Kernel to mitigate any potential risks.
Yes, you can manually apply the provided patch to your existing kernel source code. However, it is recommended to update to the latest stable version of the Linux Kernel for comprehensive security improvements.
You can refer to the vulnerability details in the Open Source Vulnerability format provided by the Cloud Security Alliance's GSD Database. The link to the specific vulnerability is available in the 'source' field of the 'database_specific' section in the JSON report.
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.
