CVE-2024-57922 is a vulnerability identified in the Linux kernel, specifically within the Direct Rendering Manager (DRM) subsystem related to AMD display drivers. The issue arises in the helper functions dcn_bw_ceil2() and dcn_bw_floor2(), which are used for bandwidth calculations in the Display Core Next (DCN) component. These wrapper functions lacked a proper check for the 'granularity' parameter being non-zero. Without this validation, if granularity is zero, it can lead to a divide-by-zero error or an assertion failure. This can cause the kernel to crash or become unstable, resulting in a denial of service (DoS) condition. The vulnerability was addressed by adding a check to ensure granularity is not zero before performing calculations, preventing the divide-by-zero scenario. The affected versions are identified by a specific commit hash, indicating this is a recent and targeted fix. There are no known exploits in the wild at the time of publication, and no CVSS score has been assigned yet. The vulnerability primarily impacts the stability and availability of systems running vulnerable Linux kernel versions with AMD DRM components enabled.

For European organizations, the primary impact of CVE-2024-57922 is on system availability and stability. Systems using Linux kernels with AMD graphics hardware and the affected DRM drivers could experience kernel panics or crashes if exploited, leading to service interruptions. This could affect servers, workstations, or embedded devices relying on AMD GPUs for display or compute tasks. While this vulnerability does not directly lead to privilege escalation or data leakage, the resulting denial of service could disrupt critical business operations, especially in sectors relying on high availability such as finance, healthcare, and manufacturing. Organizations using Linux-based infrastructure with AMD graphics in desktop environments or specialized hardware should be aware of potential disruptions. Since no known exploits exist yet, the risk is currently theoretical but should be mitigated proactively to avoid future exploitation attempts.

To mitigate this vulnerability, European organizations should: 1) Identify Linux systems running AMD DRM drivers and verify kernel versions against the patched commit. 2) Apply the official Linux kernel patch that adds the granularity check as soon as it is available in their distribution's kernel updates. 3) For environments where immediate patching is not feasible, consider disabling or limiting the use of AMD DRM components if possible, or restrict access to affected systems to trusted users only. 4) Monitor system logs for kernel warnings or crashes related to DRM or display subsystems that could indicate attempts to trigger this vulnerability. 5) Engage with Linux distribution vendors to ensure timely updates and backports for enterprise kernels. 6) Incorporate this vulnerability into vulnerability management and patching cycles to maintain ongoing protection.