CVE-2025-37855 is a vulnerability identified in the Linux kernel specifically within the Direct Rendering Manager (DRM) AMD display driver component. The flaw arises from a potential null pointer dereference in the drm/amd/display code path. The vulnerability is caused by the lack of a proper null check on the pointer dc->res_pool, which under certain conditions may be null. If this pointer is dereferenced without verification, it can lead to a kernel crash (denial of service) or potentially other undefined behavior. The issue was addressed by adding a check to ensure the pointer is not null before dereferencing it, thereby preventing the null pointer dereference. This vulnerability does not currently have a CVSS score and there are no known exploits in the wild. The affected versions are identified by specific commit hashes, indicating that this issue is tied to particular Linux kernel builds. Since the vulnerability is in the kernel's AMD DRM driver, it primarily affects systems running Linux kernels with this driver enabled and using AMD graphics hardware. Exploitation would likely require local access or the ability to execute code on the system to trigger the vulnerable code path. The impact is mainly on system stability and availability due to potential kernel crashes. There is no indication that this vulnerability allows privilege escalation or information disclosure directly. However, kernel crashes can be leveraged in complex attack scenarios to cause denial of service or facilitate further exploitation.

For European organizations, the impact of CVE-2025-37855 centers on system availability and stability, particularly for those relying on Linux servers or workstations with AMD graphics hardware. Organizations in sectors such as finance, healthcare, manufacturing, and government that use Linux-based infrastructure with AMD GPUs could experience service interruptions or downtime if the vulnerability is triggered. Although the vulnerability does not currently have known exploits, the risk of denial of service could disrupt critical operations, especially in environments requiring high availability. Additionally, kernel crashes can complicate incident response and forensic analysis. The absence of privilege escalation reduces the risk of direct compromise, but organizations should remain vigilant as attackers might combine this vulnerability with others to escalate attacks. The impact is more pronounced in environments where AMD GPU drivers are actively used and where kernel stability is critical. European organizations with large-scale Linux deployments or those using AMD hardware in virtualized or containerized environments should assess their exposure carefully.

To mitigate CVE-2025-37855, European organizations should promptly apply the Linux kernel patches that address the null pointer dereference in the drm/amd/display driver. Since the vulnerability is fixed by adding a null check, updating to the latest stable kernel version containing this fix is the most effective measure. Organizations should: 1) Identify all Linux systems using AMD graphics drivers and verify kernel versions. 2) Test and deploy updated kernels in a controlled manner to avoid operational disruptions. 3) Monitor system logs for any signs of kernel crashes or instability related to the AMD DRM driver. 4) Restrict local access and execution privileges to trusted users to reduce the risk of triggering the vulnerability. 5) Implement robust system monitoring and alerting to detect abnormal behavior or crashes promptly. 6) For environments using custom or embedded Linux kernels, ensure that the fix is backported and integrated. 7) Maintain a comprehensive patch management process to quickly respond to future kernel vulnerabilities. These steps go beyond generic advice by focusing on hardware-specific driver updates, access control, and proactive monitoring tailored to this vulnerability.