CVE-2024-52332 is a vulnerability identified in the Linux kernel specifically related to the igb network driver module. The issue arises in the igb_init_module() function during the initialization of the igb driver. When the pci_register_driver() call fails, the code does not properly unregister the dca_notifier. As a result, the dca_notifier remains registered and can be invoked even though the igb driver failed to install correctly. This leads to a potential invalid memory access, which can cause kernel instability or crashes. The vulnerability is rooted in improper error handling and resource cleanup during the driver initialization process. Since the igb driver is responsible for Intel Gigabit Ethernet adapters, this flaw affects systems using these network interfaces. The invalid memory access could be triggered locally or remotely depending on the system configuration and attacker capabilities, potentially leading to denial of service (system crash) or other undefined kernel behavior. No known exploits are reported in the wild as of the publication date, and no CVSS score has been assigned yet. The vulnerability affects multiple versions of the Linux kernel identified by the same commit hash, indicating a specific code state before the patch was applied. The fix involves ensuring that the dca_notifier is unregistered if pci_register_driver() fails, preventing the notifier from being called erroneously and avoiding invalid memory access.

For European organizations, this vulnerability poses a risk primarily to servers and workstations running Linux kernels with the vulnerable igb driver enabled and Intel Gigabit Ethernet hardware in use. The impact includes potential denial of service due to kernel crashes caused by invalid memory access. This could disrupt critical network services, affecting availability and operational continuity. While the vulnerability does not directly imply privilege escalation or data breach, kernel instability can be exploited as a stepping stone for further attacks or cause significant downtime. Organizations relying on Linux-based infrastructure for networking, cloud services, or data centers could experience service interruptions. Given the ubiquity of Linux in enterprise environments across Europe, especially in sectors like finance, telecommunications, and government, the vulnerability requires timely remediation to maintain system stability and network reliability.

European organizations should promptly update their Linux kernel to the patched version that addresses CVE-2024-52332. Specifically, ensure that the igb driver module is updated to the fixed release where the dca_notifier is properly unregistered upon pci_register_driver() failure. System administrators should audit their environments to identify systems using Intel Gigabit Ethernet adapters with the vulnerable igb driver. Temporary mitigation includes disabling the igb driver if feasible or unloading the module until a patch can be applied, though this may impact network connectivity. Additionally, monitoring kernel logs for signs of invalid memory access or related errors can help detect attempts to trigger the vulnerability. Incorporating this vulnerability into vulnerability management and patching workflows is critical. Testing patches in staging environments before deployment is recommended to avoid unintended disruptions. Network segmentation and limiting access to critical Linux systems can reduce exposure. Finally, maintaining up-to-date backups and incident response plans will help mitigate potential service disruptions.