Linux Kernel Vulnerability

The Linux kernel is a critical component of the operating system, responsible for managing hardware resources and providing services to applications. This vulnerability affects the team device type change functionality in the Linux kernel, allowing an attacker to manipulate the device type of a port without proper authorization.

This vulnerability affects all versions of the Linux kernel that use the team device driver (e.g., Ubuntu 20.04, CentOS 8). To check if you're affected, run the following command:

grep "team_dev_type_check_change" /boot/config-$(uname -r)

Note: This is a specific check for the affected kernel configuration.

Version info not specified in the advisory.

To fix this vulnerability, you'll need to apply the patch from the Linux kernel repository. Follow these steps:

1. Download the patch from the Linux kernel repository: https://git.kernel.org/stable/c/0ae9cfc454ea5ead5f3ddbdfe2e70270d8e2c8ef
2. Apply the patch to your kernel source code using patch or a similar tool.
3. Rebuild your kernel with the patched configuration.

Immediate mitigations:

• Restrict network access to your Linux system (firewall it from the public internet)
• Audit device driver configurations for suspicious changes

• git.kernel.org
• git.kernel.org
• git.kernel.org