CVE-2023-52661 is a vulnerability identified in the Linux kernel specifically within the Direct Rendering Manager (DRM) subsystem for NVIDIA Tegra devices, related to the tegra_dc_rgb_probe() function. The issue arises due to improper error handling in the clock management code. When the clk_get_sys() call for the "pll_d2_out0" clock fails, the corresponding clk_put() call, which is necessary to release the acquired clock resource, is missing in the error path. This omission can lead to resource leaks or inconsistent kernel state. The patch for this vulnerability adds the missing clk_put() call and introduces a new error handling label 'put_pll_d_out0' to ensure proper cleanup. Although the vulnerability does not have a CVSS score and no known exploits are reported in the wild, the flaw represents a kernel resource management bug that could potentially lead to system instability or denial of service if triggered. The affected versions are specific Linux kernel commits identified by their hashes, indicating that this vulnerability is present in certain development or stable branches before the fix was applied. The vulnerability is technical and low-level, affecting the kernel's clock management for Tegra hardware, which is used in embedded systems and some specialized computing devices.

For European organizations, the impact of CVE-2023-52661 depends largely on the deployment of Linux systems running on NVIDIA Tegra hardware or similar embedded platforms using the affected kernel versions. Organizations using Tegra-based devices in industrial control systems, IoT infrastructure, or specialized computing environments could face risks of system instability or denial of service due to improper clock resource management. While the vulnerability does not directly enable privilege escalation or remote code execution, the potential for kernel resource leaks or crashes could disrupt critical services or embedded device operations. This may affect sectors such as manufacturing, automotive, telecommunications, and critical infrastructure where Tegra-based Linux systems are integrated. The absence of known exploits reduces immediate risk, but the vulnerability should be addressed promptly to maintain system reliability and prevent potential exploitation in the future.

European organizations should prioritize updating their Linux kernel to the latest patched versions that include the fix for CVE-2023-52661. Specifically, they should ensure that any Tegra-based devices or embedded systems running affected kernel versions are upgraded to kernels containing the corrected error handling code with the added clk_put() call. In environments where immediate patching is not feasible, organizations should monitor system logs for signs of clock management errors or resource leaks related to the DRM Tegra subsystem. Additionally, implementing strict access controls and limiting kernel module loading to trusted administrators can reduce the risk of exploitation. For embedded device manufacturers and integrators, incorporating this patch into firmware updates and validating kernel stability post-update is critical. Finally, maintaining an inventory of devices using Tegra hardware and affected Linux kernel versions will help prioritize remediation efforts.