CVE-2026-74445 PUBLISHED

drm/vmwgfx: reject DX_BIND_QUERY without a DX context

Assigner: Linux
Reserved: 15.08.2026 Published: 15.08.2026 Updated: 15.08.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 9c079b8ce8bf8e0394149eb39c78b04285644bcc to 7eae011829f94a76470ec76f016805f508437755 (excl.)
  • affected from 9c079b8ce8bf8e0394149eb39c78b04285644bcc to 0634d50e8b398c25bd07c96b048e484d22688c26 (excl.)
  • affected from 9c079b8ce8bf8e0394149eb39c78b04285644bcc to e479240a1e076ba1104236331abd62400bf1d495 (excl.)
  • affected from 9c079b8ce8bf8e0394149eb39c78b04285644bcc to 6b1eb0b63cc153e1c0cb5ab8350950119be11947 (excl.)
  • affected from 9c079b8ce8bf8e0394149eb39c78b04285644bcc to 55ec09c9ce10b1272802c7ab6c1be2ea0dbc68db (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 4.20 is affected
  • unaffected from 0 to 4.20 (excl.)
  • unaffected from 6.6.151 to 6.6.* (incl.)
  • unaffected from 6.12.103 to 6.12.* (incl.)
  • unaffected from 6.18.44 to 6.18.* (incl.)
  • unaffected from 7.1.8 to 7.1.* (incl.)
  • unaffected from 7.2-rc6 to * (incl.)

References