CVE-2026-74445 (GCVE-0-2026-74445)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:26 – Updated: 2026-08-17 05:19
VLAI
Title
drm/vmwgfx: reject DX_BIND_QUERY without a DX context
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9c079b8ce8bf8e0394149eb39c78b04285644bcc , < 7eae011829f94a76470ec76f016805f508437755 (git)
Affected: 9c079b8ce8bf8e0394149eb39c78b04285644bcc , < 0634d50e8b398c25bd07c96b048e484d22688c26 (git)
Affected: 9c079b8ce8bf8e0394149eb39c78b04285644bcc , < e479240a1e076ba1104236331abd62400bf1d495 (git)
Affected: 9c079b8ce8bf8e0394149eb39c78b04285644bcc , < 6b1eb0b63cc153e1c0cb5ab8350950119be11947 (git)
Affected: 9c079b8ce8bf8e0394149eb39c78b04285644bcc , < 55ec09c9ce10b1272802c7ab6c1be2ea0dbc68db (git)
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Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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      "descriptions": [
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          "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:19:32.678Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
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          "url": "https://git.kernel.org/stable/c/e479240a1e076ba1104236331abd62400bf1d495"
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        {
          "url": "https://git.kernel.org/stable/c/6b1eb0b63cc153e1c0cb5ab8350950119be11947"
        },
        {
          "url": "https://git.kernel.org/stable/c/55ec09c9ce10b1272802c7ab6c1be2ea0dbc68db"
        }
      ],
      "title": "drm/vmwgfx: reject DX_BIND_QUERY without a DX context",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74445",
    "datePublished": "2026-08-15T12:26:52.063Z",
    "dateReserved": "2026-08-15T05:44:03.898Z",
    "dateUpdated": "2026-08-17T05:19:32.678Z",
    "state": "PUBLISHED"
  },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-17T14:19:23+00:00",
      "cve": "CVE-2026-74445",
      "id": "CVE-2026-74445",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/vmwgfx: reject DX_BIND_QUERY without a DX context",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74445.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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