Critical FIFO Access Vulnerability in Linux Kernel - CVE-2024-44950
Summary
CVE-2024-44950: In the Linux kernel, the following vulnerability has been resolved: serial: sc16is7xx: fix invalid FIFO access with special register set When enabling access to the special register set, Receiver time-out and RHR interru... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware and software interactions. It manages system resources, facilitates communication between hardware and software, and ensures system stability. The kernel is crucial for performance and security, making it a prime target for vulnerabilities. CVE-2024-44950 specifically affects the serial communication subsystem, particularly the SC16IS7XX driver, which is responsible for handling serial communication through special registers.
Vulnerability Detail
CVE-2024-44950 is a vulnerability in the Linux kernel's SC16IS7XX serial driver that arises when access to a special register set is enabled. This can lead to Receiver time-out and RHR interrupts, causing the IRQ handler to attempt reading from the FIFO via the RHR register at address 0x00. However, address 0x00 is mapped to the DLL register, resulting in incorrect FIFO readings. This misconfiguration can lead to erroneous data being processed, potentially compromising system integrity and reliability.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the kernel updates as they become available.
Conclusion
CVE-2024-44950 is a significant vulnerability in the Linux kernel's SC16IS7XX driver that can lead to incorrect FIFO access and erroneous data processing. Users are advised to update their systems to the latest kernel versions to mitigate this risk. Monitoring tools like Vulert can assist in identifying vulnerabilities in your software without requiring code access.
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FAQ
CVE-2024-44950 is a vulnerability in the Linux kernel's SC16IS7XX serial driver that can lead to incorrect FIFO readings due to improper access to special registers.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By uploading your manifest file like package-lock.json, you can check for vulnerabilities in real-time.
The vulnerability can lead to erroneous data processing, which may compromise system integrity and reliability, particularly in applications relying on serial communication.
You can update your Linux kernel through your package manager. For Debian-based systems, use the command 'sudo apt-get update' followed by 'sudo apt-get upgrade' to install the latest kernel version.
Currently, there are no specific workarounds available. The recommended action is to apply the kernel updates as soon as they are released.
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