CVE-2026-93115 (GCVE-0-2026-93115)
Vulnerability from cvelistv5
Published
2026-09-17 16:11
Modified
2026-10-19 09:05
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: platform/mellanox: mlxbf-pmc: Check ACPI_COMPANION() against NULL Every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), so platform drivers that rely on the existence of a device's ACPI companion object need to verify its presence. mlxbf_pmc_probe() passes the result of ACPI_COMPANION() to acpi_device_hid(), which dereferences it, so force-binding the driver to a device without an ACPI companion leads to a NULL pointer dereference. Accordingly, add a requisite ACPI_COMPANION() check against NULL to the mlxbf-pmc driver and return -ENODEV when the companion is missing.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1a218d312e65ec396b2739056a8ea78493015f21
Version: 1a218d312e65ec396b2739056a8ea78493015f21
Version: 1a218d312e65ec396b2739056a8ea78493015f21
Version: 1a218d312e65ec396b2739056a8ea78493015f21
Version: 1a218d312e65ec396b2739056a8ea78493015f21
Version: 1a218d312e65ec396b2739056a8ea78493015f21
Version: 1a218d312e65ec396b2739056a8ea78493015f21
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/platform/mellanox/mlxbf-pmc.c"
          ],
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.11"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "version": "5.15.221",
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            },
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              "status": "unaffected",
              "version": "6.18.52",
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            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
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                {
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                  "versionEndExcluding": "6.1.188",
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              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/mellanox: mlxbf-pmc: Check ACPI_COMPANION() against NULL\n\nEvery platform driver can be forced to match a device that doesn\u0027t match\nits list of device IDs because of device_match_driver_override(), so\nplatform drivers that rely on the existence of a device\u0027s ACPI companion\nobject need to verify its presence.\n\nmlxbf_pmc_probe() passes the result of ACPI_COMPANION() to\nacpi_device_hid(), which dereferences it, so force-binding the driver to\na device without an ACPI companion leads to a NULL pointer dereference.\n\nAccordingly, add a requisite ACPI_COMPANION() check against NULL to the\nmlxbf-pmc driver and return -ENODEV when the companion is missing."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:05:49.022Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/950d8e8375f3ff4787de51b7bdf8dd23a3ad6547"
        },
        {
          "url": "https://git.kernel.org/stable/c/fdfb736282b9665c0169df0c4152ec91fdea2767"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf1e0cc5cc1d4e71b699fc98cc9198ead0ed53e0"
        },
        {
          "url": "https://git.kernel.org/stable/c/a75b84119e56fc34b0f1403f3b93d357a55dabb6"
        },
        {
          "url": "https://git.kernel.org/stable/c/71ba8b6e28f7a83b724036f5de07e03bb5473286"
        },
        {
          "url": "https://git.kernel.org/stable/c/d25dd08268aeaceb485189aaa84aa6d68a460291"
        },
        {
          "url": "https://git.kernel.org/stable/c/c38cce70adef874c2a7b5132c14d6c221401deff"
        }
      ],
      "title": "platform/mellanox: mlxbf-pmc: Check ACPI_COMPANION() against NULL",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93115",
    "datePublished": "2026-09-17T16:11:23.145Z",
    "dateReserved": "2026-09-17T16:02:15.086Z",
    "dateUpdated": "2026-10-19T09:05:49.022Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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