CVE-2026-43318

A flaw was found in the Linux kernel's drm/amdgpu component. A synchronization bug in the amdgpu_dma_buf_move_notify function, which handles direct memory access buffer (dmabuf) movements, can lead to a page fault. This occurs when a process attempts to access a shared buffer while another process is still updating its page table after a buffer move, potentially causing a system crash or denial of service.

This vulnerability is rated as Moderate severity because exploitation requires local system access, AMD graphics hardware, and specific conditions involving concurrent direct memory access buffer sharing across processes. A local attacker can trigger this race condition to induce a kernel page fault and crash the operating system, but the issue does not permit code execution or privilege escalation. Enterprise deployments running headless configurations or environments without AMD GPU devices are not exposed to this flaw.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.