CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's vmwgfx driver, specifically in the handling of DirectX bind queries, where a NULL pointer dereference can occur if a userspace application submits an invalid context handle. This can lead to a kernel crash, impacting system stability and availability. Organizations utilizing Linux systems with the vmwgfx driver should prioritize addressing this issue to prevent potential service disruptions.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: reject DX_BIND_QUERY without a DX context vmw_cmd_dx_bind_query() unconditionally dereferences sw_context->dx_ctx_node->ctx. Userspace can trigger a NULL pointer dereference from any render-node fd by submitting an execbuf with dx_context_handle == SVGA3D_INVALID_ID and a SVGA_3D_CMD_DX_BIND_QUERY opcode in the command stream: dx_ctx_node is left NULL and the kernel oopses on the assignment. The same NULL is then re-read in vmw_resources_reserve() via vmw_context_get_dx_query_mob(). All sibling DX handlers fail-close on a missing dx_ctx_node using VMW_GET_CTX_NODE(). Use the same pattern here, returning -EINVAL up front before any relocation state is published.