CVE-2022-49777 is a vulnerability identified in the Linux kernel related to the i8042 driver, which manages the PS/2 keyboard and mouse interface on many systems. The issue arises from improper handling of the platform device pointer during module removal. Specifically, the vulnerability is due to the resetting of the module-wide i8042_platform_device pointer in the i8042_probe() or i8042_remove() functions. This premature reset prevents the device from being correctly destroyed during the module unload process in i8042_exit(). As a result, this can lead to a resource leak where the platform device is not properly released, potentially causing memory leaks or dangling pointers within the kernel. While this vulnerability does not directly enable code execution or privilege escalation, improper resource management in kernel modules can lead to system instability or denial of service (DoS) conditions. The affected versions include multiple Linux kernel commits prior to the fix, indicating that a range of Linux kernel versions incorporating these commits are vulnerable. The vulnerability was published on May 1, 2025, and no known exploits are currently reported in the wild. The absence of a CVSS score suggests that the issue is recognized but not yet fully assessed for severity. The fix involves avoiding resetting the i8042_platform_device pointer prematurely, ensuring proper cleanup during module unload. This vulnerability is technical and specific to kernel module lifecycle management, primarily affecting systems using the i8042 driver for PS/2 device management.

For European organizations, the impact of CVE-2022-49777 is primarily related to system stability and reliability rather than direct compromise of confidentiality or integrity. Systems running vulnerable Linux kernel versions with the i8042 driver may experience resource leaks leading to degraded performance or kernel instability, which could result in denial of service conditions. This is particularly relevant for organizations relying on legacy hardware or embedded systems that utilize PS/2 interfaces, common in industrial control systems, manufacturing environments, or legacy IT infrastructure. While the vulnerability does not currently have known exploits, the potential for kernel instability could disrupt critical operations, especially in sectors such as manufacturing, healthcare, and government services where Linux-based systems are prevalent. The impact is less severe for organizations that have migrated to USB-based input devices or newer hardware that does not rely on the i8042 driver. However, given the widespread use of Linux in servers, desktops, and embedded devices across Europe, the vulnerability warrants attention to prevent possible service interruptions.

European organizations should prioritize updating their Linux kernel to the latest patched versions that address CVE-2022-49777. Specifically, ensure that kernel versions include the fix that prevents resetting the i8042_platform_device pointer prematurely. For systems where kernel updates are not immediately feasible, organizations should audit the use of PS/2 devices and consider transitioning to USB input devices where possible to reduce dependency on the i8042 driver. Additionally, monitoring system logs for kernel warnings or errors related to i8042 module loading/unloading can help detect potential issues early. Implementing robust kernel crash dump and monitoring solutions will aid in diagnosing any instability caused by this vulnerability. For embedded or industrial systems, coordinate with hardware vendors to obtain firmware or kernel updates that incorporate the fix. Finally, maintain a comprehensive patch management process that includes Linux kernel updates and verify that all critical systems are running supported and secure kernel versions.