CVE-2026-74445

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux9c079b8ce8bf8e0394149eb39c78b04285644bcc < 7eae011829f94a76470ec76f016805f508437755affected
LinuxLinux9c079b8ce8bf8e0394149eb39c78b04285644bcc < 0634d50e8b398c25bd07c96b048e484d22688c26affected
LinuxLinux9c079b8ce8bf8e0394149eb39c78b04285644bcc < e479240a1e076ba1104236331abd62400bf1d495affected
LinuxLinux9c079b8ce8bf8e0394149eb39c78b04285644bcc < 6b1eb0b63cc153e1c0cb5ab8350950119be11947affected
LinuxLinux9c079b8ce8bf8e0394149eb39c78b04285644bcc < 55ec09c9ce10b1272802c7ab6c1be2ea0dbc68dbaffected
LinuxLinux4.20affected
LinuxLinux0 < 4.20unaffected
LinuxLinux6.6.151 <= 6.6.*unaffected
LinuxLinux6.12.103 <= 6.12.*unaffected
LinuxLinux6.18.44 <= 6.18.*unaffected
LinuxLinux7.1.8 <= 7.1.*unaffected
LinuxLinux7.2-rc6 <= *unaffected

Weaknesses

References