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FKIE_CVE-2026-74445

Vulnerability from fkie_nvd - Published: 2026-08-15 13:17 - Updated: 2026-08-17 06:19
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0634d50e8b398c25bd07c96b048e484d22688c26
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/55ec09c9ce10b1272802c7ab6c1be2ea0dbc68db
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6b1eb0b63cc153e1c0cb5ab8350950119be11947
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7eae011829f94a76470ec76f016805f508437755
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e479240a1e076ba1104236331abd62400bf1d495
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7eae011829f94a76470ec76f016805f508437755",
              "status": "affected",
              "version": "9c079b8ce8bf8e0394149eb39c78b04285644bcc",
              "versionType": "git"
            },
            {
              "lessThan": "0634d50e8b398c25bd07c96b048e484d22688c26",
              "status": "affected",
              "version": "9c079b8ce8bf8e0394149eb39c78b04285644bcc",
              "versionType": "git"
            },
            {
              "lessThan": "e479240a1e076ba1104236331abd62400bf1d495",
              "status": "affected",
              "version": "9c079b8ce8bf8e0394149eb39c78b04285644bcc",
              "versionType": "git"
            },
            {
              "lessThan": "6b1eb0b63cc153e1c0cb5ab8350950119be11947",
              "status": "affected",
              "version": "9c079b8ce8bf8e0394149eb39c78b04285644bcc",
              "versionType": "git"
            },
            {
              "lessThan": "55ec09c9ce10b1272802c7ab6c1be2ea0dbc68db",
              "status": "affected",
              "version": "9c079b8ce8bf8e0394149eb39c78b04285644bcc",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.20"
            },
            {
              "lessThan": "4.20",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: reject DX_BIND_QUERY without a DX context\n\nvmw_cmd_dx_bind_query() unconditionally dereferences\nsw_context-\u003edx_ctx_node-\u003ectx.  Userspace can trigger a NULL pointer\ndereference from any render-node fd by submitting an execbuf with\ndx_context_handle == SVGA3D_INVALID_ID and a SVGA_3D_CMD_DX_BIND_QUERY\nopcode in the command stream: dx_ctx_node is left NULL and the kernel\noopses on the assignment.  The same NULL is then re-read in\nvmw_resources_reserve() via vmw_context_get_dx_query_mob().\n\nAll sibling DX handlers fail-close on a missing dx_ctx_node using\nVMW_GET_CTX_NODE().  Use the same pattern here, returning -EINVAL up\nfront before any relocation state is published."
    }
  ],
  "id": "CVE-2026-74445",
  "lastModified": "2026-08-17T06:19:40.303",
  "metrics": {},
  "published": "2026-08-15T13:17:49.067",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0634d50e8b398c25bd07c96b048e484d22688c26"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/55ec09c9ce10b1272802c7ab6c1be2ea0dbc68db"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6b1eb0b63cc153e1c0cb5ab8350950119be11947"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7eae011829f94a76470ec76f016805f508437755"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e479240a1e076ba1104236331abd62400bf1d495"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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