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FKIE_CVE-2026-93115

Vulnerability from fkie_nvd - Published: 2026-09-17 17:18 - Updated: 2026-09-17 17:18
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/71ba8b6e28f7a83b724036f5de07e03bb5473286
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/950d8e8375f3ff4787de51b7bdf8dd23a3ad6547
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a75b84119e56fc34b0f1403f3b93d357a55dabb6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bf1e0cc5cc1d4e71b699fc98cc9198ead0ed53e0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c38cce70adef874c2a7b5132c14d6c221401deff
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d25dd08268aeaceb485189aaa84aa6d68a460291
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fdfb736282b9665c0169df0c4152ec91fdea2767
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/platform/mellanox/mlxbf-pmc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "950d8e8375f3ff4787de51b7bdf8dd23a3ad6547",
              "status": "affected",
              "version": "1a218d312e65ec396b2739056a8ea78493015f21",
              "versionType": "git"
            },
            {
              "lessThan": "fdfb736282b9665c0169df0c4152ec91fdea2767",
              "status": "affected",
              "version": "1a218d312e65ec396b2739056a8ea78493015f21",
              "versionType": "git"
            },
            {
              "lessThan": "bf1e0cc5cc1d4e71b699fc98cc9198ead0ed53e0",
              "status": "affected",
              "version": "1a218d312e65ec396b2739056a8ea78493015f21",
              "versionType": "git"
            },
            {
              "lessThan": "a75b84119e56fc34b0f1403f3b93d357a55dabb6",
              "status": "affected",
              "version": "1a218d312e65ec396b2739056a8ea78493015f21",
              "versionType": "git"
            },
            {
              "lessThan": "71ba8b6e28f7a83b724036f5de07e03bb5473286",
              "status": "affected",
              "version": "1a218d312e65ec396b2739056a8ea78493015f21",
              "versionType": "git"
            },
            {
              "lessThan": "d25dd08268aeaceb485189aaa84aa6d68a460291",
              "status": "affected",
              "version": "1a218d312e65ec396b2739056a8ea78493015f21",
              "versionType": "git"
            },
            {
              "lessThan": "c38cce70adef874c2a7b5132c14d6c221401deff",
              "status": "affected",
              "version": "1a218d312e65ec396b2739056a8ea78493015f21",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/platform/mellanox/mlxbf-pmc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.11"
            },
            {
              "lessThan": "5.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "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\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."
    }
  ],
  "id": "CVE-2026-93115",
  "lastModified": "2026-09-17T17:18:06.073",
  "metrics": {},
  "published": "2026-09-17T17:18:06.073",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/71ba8b6e28f7a83b724036f5de07e03bb5473286"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/950d8e8375f3ff4787de51b7bdf8dd23a3ad6547"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a75b84119e56fc34b0f1403f3b93d357a55dabb6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bf1e0cc5cc1d4e71b699fc98cc9198ead0ed53e0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c38cce70adef874c2a7b5132c14d6c221401deff"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d25dd08268aeaceb485189aaa84aa6d68a460291"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fdfb736282b9665c0169df0c4152ec91fdea2767"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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