drm/vmwgfx: reject DX_BIND_QUERY without a DX context

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74445
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:17:49 UTC
Updated2026-08-15 13:17:49 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 9c079b8ce8bf8e0394149eb39c78b04285644bcc 7eae011829f94a76470ec76f016805f508437755 git Not specified
CNA Linux Linux affected 9c079b8ce8bf8e0394149eb39c78b04285644bcc 0634d50e8b398c25bd07c96b048e484d22688c26 git Not specified
CNA Linux Linux affected 9c079b8ce8bf8e0394149eb39c78b04285644bcc e479240a1e076ba1104236331abd62400bf1d495 git Not specified
CNA Linux Linux affected 9c079b8ce8bf8e0394149eb39c78b04285644bcc 6b1eb0b63cc153e1c0cb5ab8350950119be11947 git Not specified
CNA Linux Linux affected 9c079b8ce8bf8e0394149eb39c78b04285644bcc 55ec09c9ce10b1272802c7ab6c1be2ea0dbc68db git Not specified
CNA Linux Linux affected 4.20 Not specified
CNA Linux Linux unaffected 4.20 semver Not specified
CNA Linux Linux unaffected 6.6.151 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.103 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc6 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e479240a1e076ba1104236331abd62400bf1d495 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/55ec09c9ce10b1272802c7ab6c1be2ea0dbc68db 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0634d50e8b398c25bd07c96b048e484d22688c26 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7eae011829f94a76470ec76f016805f508437755 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6b1eb0b63cc153e1c0cb5ab8350950119be11947 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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