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firmware: arm_scmi: Fix SCMI device destroy lifetimes

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix SCMI device destroy lifetimes scmi_child_dev_find() drops the reference returned by device_find_child() before returning the scmi_device pointer. A concurrent unregister can then release the device while the destroy path is still using the returned pointer. Make the lookup helper return the device_find_child() reference and keep it until scmi_device_destroy() has finished unregistering the child. Also split device_unregister() in __scmi_device_destroy() so the SCMI bus ID is not made reusable until after device_del() has removed the old scmi_dev.N name from sysfs. This avoids a new SCMI device reusing the same ID while the old device is still registered. The final device release callback is also a possible cleanup path when SCMI children are deleted by driver core recursion rather than __scmi_device_destroy(). Release the SCMI bus ID from a common helper used by destroy, register-failure and final-release paths, and clear scmi_dev->id after freeing it so the final release cannot free the same ID again.

Announced Source revision 1
Original source ↗

CVE-2026-93081

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-93081

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2fbf6c9695ad9f05e7e5c166bf43fac7cb3276b3",
        "lessThan": "d8ecdceeb90cd2c265b222a7b65487faf68fea73",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "969d8beaa2e374387bf9aa5602ef84fc50bb48d8",
        "lessThan": "916e27f71a80f6d77c48d1a1a5782d6d5ef9017c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9ca67840c0ddf3f39407339624cef824a4f27599",
        "lessThan": "a60bc2df2d323cc1342f0cf95563cae266801e20",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9ca67840c0ddf3f39407339624cef824a4f27599",
        "lessThan": "c59b3393df1348a12308aaabd5fbc58ed6b21cf5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9ca67840c0ddf3f39407339624cef824a4f27599",
        "lessThan": "6abe8fe36b29ff51d1a42c2f338972883f4751a5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "91ff1e9652fb9beb0174267d6bb38243dff211bb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ff4273d47da81b95ed9396110bcbd1b7b7470fe8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8a8a3547d5c4960da053df49c75bf623827a25da",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6.6.90",
        "lessThan": "6.6.160",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.12.28",
        "lessThan": "6.12.114",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.15.182",
        "lessThan": "5.16",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.1.138",
        "lessThan": "6.2",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.14.6",
        "lessThan": "6.15",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "drivers/firmware/arm_scmi/bus.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.15"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.15",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.114",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.57",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/firmware/arm_scmi/bus.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-93081

Source reference: /cveMetadata/cveId

Publisher severity

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Event
#48705 · Revision 1
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