Skip to content
Heist/ feed
Back to feed
UnratedFix available

firmware: arm_scmi: Fix SCMI device destroy lifetimes

Type: advisorySources: OSV

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.

Products
Kernel
Affected versions
Not specified
Fixed versions
6.1.191, 6.12.114, 6.18.57, 6.6.160, 7.2.6
CVEs
CVE-2026-93081
Confirmed fixed CVEs
Not specified
Updated in this feed
2 Nov 2026, 17:32 UTC · Revision 1

Source evidence

firmware: arm_scmi: Fix SCMI device destroy lifetimes

core-osv · Original source

Published 17 Sept 2026, 16:11 UTC

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.

osv:CVE-2026-93081

Kernel

Fixed versions: 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.2.6

Complete source record
{
  "id": "156de60606e238529cc4ee049674056b853153339d262c7cdc37cb89667a0733",
  "url": "https://osv.dev/vulnerability/CVE-2026-93081",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "firmware: arm_scmi: Fix SCMI device destroy lifetimes",
    "summary": "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.",
    "evidence": "osv:CVE-2026-93081",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.191",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.160",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.114",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.57",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-93081",
      "aliases": [
        "CVE-2026-93081"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ff4273d47da81b95ed9396110bcbd1b7b7470fe8"
                },
                {
                  "fixed": "afe5c022a180e0ade394d3fffbafc1a701f50993"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2fbf6c9695ad9f05e7e5c166bf43fac7cb3276b3"
                },
                {
                  "fixed": "d8ecdceeb90cd2c265b222a7b65487faf68fea73"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "969d8beaa2e374387bf9aa5602ef84fc50bb48d8"
                },
                {
                  "fixed": "916e27f71a80f6d77c48d1a1a5782d6d5ef9017c"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9ca67840c0ddf3f39407339624cef824a4f27599"
                },
                {
                  "fixed": "a60bc2df2d323cc1342f0cf95563cae266801e20"
                },
                {
                  "fixed": "c59b3393df1348a12308aaabd5fbc58ed6b21cf5"
                },
                {
                  "fixed": "6abe8fe36b29ff51d1a42c2f338972883f4751a5"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6.1.138"
                },
                {
                  "fixed": "6.1.191"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6.6.90"
                },
                {
                  "fixed": "6.6.160"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6.12.28"
                },
                {
                  "fixed": "6.12.114"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5.15.182"
                },
                {
                  "fixed": "5.16"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6.14.6"
                },
                {
                  "fixed": "6.15"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "91ff1e9652fb9beb0174267d6bb38243dff211bb"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8a8a3547d5c4960da053df49c75bf623827a25da"
                }
              ]
            }
          ],
          "versions": [
            "v6.1.190",
            "v6.1.189",
            "v6.1.188",
            "v6.1.187",
            "v6.1.186",
            "v6.1.185",
            "v6.1.184",
            "v6.1.183",
            "v6.1.182",
            "v6.1.181",
            "v6.1.180",
            "v6.1.179",
            "v6.1.178",
            "v6.1.177",
            "v6.1.176",
            "v6.1.175",
            "v6.1.174",
            "v6.1.173",
            "v6.1.172",
            "v6.1.171",
            "v6.1.170",
            "v6.1.169",
            "v6.1.168",
            "v6.1.167",
            "v6.1.166",
            "v6.1.165",
            "v6.1.164",
            "v6.1.163",
            "v6.1.162",
            "v6.1.161",
            "v6.1.160",
            "v6.1.159",
            "v6.1.158",
            "v6.1.157",
            "v6.1.156",
            "v6.1.155",
            "v6.1.154",
            "v6.1.153",
            "v6.1.152",
            "v6.1.151",
            "v6.1.150",
            "v6.1.149",
            "v6.1.148",
            "v6.1.147",
            "v6.1.146",
            "v6.1.145",
            "v6.1.144",
            "v6.1.143",
            "v6.1.142",
            "v6.1.141",
            "v6.1.140",
            "v6.1.139",
            "v6.1.138",
            "v6.6.159",
            "v6.6.158",
            "v6.6.157",
            "v6.6.156",
            "v6.6.155",
            "v6.6.154",
            "v6.6.153",
            "v6.6.152",
            "v6.6.151",
            "v6.6.150",
            "v6.6.149",
            "v6.6.148",
            "v6.6.147",
            "v6.6.146",
            "v6.6.145",
            "v6.6.144",
            "v6.6.143",
            "v6.6.142",
            "v6.6.141",
            "v6.6.140",
            "v6.6.139",
            "v6.6.138",
            "v6.6.137",
            "v6.6.136",
            "v6.6.135",
            "v6.6.134",
            "v6.6.133",
            "v6.6.132",
            "v6.6.131",
            "v6.6.130",
            "v6.6.129",
            "v6.6.128",
            "v6.6.127",
            "v6.6.126",
            "v6.6.125",
            "v6.6.124",
            "v6.6.123",
            "v6.6.122",
            "v6.6.121",
            "v6.6.120",
            "v6.6.119",
            "v6.6.118",
            "v6.6.117",
            "v6.6.116",
            "v6.6.115",
            "v6.6.114",
            "v6.6.113",
            "v6.6.112",
            "v6.6.111",
            "v6.6.110",
            "v6.6.109",
            "v6.6.108",
            "v6.6.107",
            "v6.6.106",
            "v6.6.105",
            "v6.6.104",
            "v6.6.103",
            "v6.6.102",
            "v6.6.101",
            "v6.6.100",
            "v6.6.99",
            "v6.6.98",
            "v6.6.97",
            "v6.6.96",
            "v6.6.95",
            "v6.6.94",
            "v6.6.93",
            "v6.6.92",
            "v6.6.91",
            "v6.6.90",
            "v6.12.113",
            "v6.12.112",
            "v6.12.111",
            "v6.12.110",
            "v6.12.109",
            "v6.12.108",
            "v6.12.107",
            "v6.12.106",
            "v6.12.105",
            "v6.12.104",
            "v6.12.103",
            "v6.12.102",
            "v6.12.101",
            "v6.12.100",
            "v6.12.99",
            "v6.12.98",
            "v6.12.97",
            "v6.12.96",
            "v6.12.95",
            "v6.12.94",
            "v6.12.93",
            "v6.12.92",
            "v6.12.91",
            "v6.12.90",
            "v6.12.89",
            "v6.12.88",
            "v6.12.87",
            "v6.12.86",
            "v6.12.85",
            "v6.12.84",
            "v6.12.83",
            "v6.12.82",
            "v6.12.81",
            "v6.12.80",
            "v6.12.79",
            "v6.12.78",
            "v6.12.77",
            "v6.12.76",
            "v6.12.75",
            "v6.12.74",
            "v6.12.73",
            "v6.12.72",
            "v6.12.71",
            "v6.12.70",
            "v6.12.69",
            "v6.12.68",
            "v6.12.67",
            "v6.12.66",
            "v6.12.65",
            "v6.12.64",
            "v6.12.63",
            "v6.12.62",
            "v6.12.61",
            "v6.12.60",
            "v6.12.59",
            "v6.12.58",
            "v6.12.57",
            "v6.12.56",
            "v6.12.55",
            "v6.12.54",
            "v6.12.53",
            "v6.12.52",
            "v6.12.51",
            "v6.12.50",
            "v6.12.49",
            "v6.12.48",
            "v6.12.47",
            "v6.12.46",
            "v6.12.45",
            "v6.12.44",
            "v6.12.43",
            "v6.12.42",
            "v6.12.41",
            "v6.12.40",
            "v6.12.39",
            "v6.12.38",
            "v6.12.37",
            "v6.12.36",
            "v6.12.35",
            "v6.12.34",
            "v6.12.33",
            "v6.12.32",
            "v6.12.31",
            "v6.12.30",
            "v6.12.29",
            "v6.12.28",
            "v5.15.224",
            "v5.15.223",
            "v5.15.222",
            "v5.15.221",
            "v5.15.220",
            "v5.15.219",
            "v5.15.218",
            "v5.15.217",
            "v5.15.216",
            "v5.15.215",
            "v5.15.214",
            "v5.15.213",
            "v5.15.212",
            "v5.15.211",
            "v5.15.210",
            "v5.15.209",
            "v5.15.208",
            "v5.15.207",
            "v5.15.206",
            "v5.15.205",
            "v5.15.204",
            "v5.15.203",
            "v5.15.202",
            "v5.15.201",
            "v5.15.200",
            "v5.15.199",
            "v5.15.198",
            "v5.15.197",
            "v5.15.196",
            "v5.15.195",
            "v5.15.194",
            "v5.15.193",
            "v5.15.192",
            "v5.15.191",
            "v5.15.190",
            "v5.15.189",
            "v5.15.188",
            "v5.15.187",
            "v5.15.186",
            "v5.15.185",
            "v5.15.184",
            "v5.15.183",
            "v5.15.182",
            "v6.14.11",
            "v6.14.10",
            "v6.14.9",
            "v6.14.8",
            "v6.14.7",
            "v6.14.6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93081.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6.1.191"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.160"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.114"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.57"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.15.0"
                },
                {
                  "fixed": "7.2.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93081.json"
          }
        }
      ],
      "modified": "2026-11-01T02:30:29.558102230Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/6abe8fe36b29ff51d1a42c2f338972883f4751a5",
        "https://git.kernel.org/stable/c/916e27f71a80f6d77c48d1a1a5782d6d5ef9017c",
        "https://git.kernel.org/stable/c/a60bc2df2d323cc1342f0cf95563cae266801e20",
        "https://git.kernel.org/stable/c/afe5c022a180e0ade394d3fffbafc1a701f50993",
        "https://git.kernel.org/stable/c/c59b3393df1348a12308aaabd5fbc58ed6b21cf5",
        "https://git.kernel.org/stable/c/d8ecdceeb90cd2c265b222a7b65487faf68fea73",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93081.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-93081",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93081.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-93081",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 487828,
  "published_at": "2026-09-17T16:11:01.679+00:00"
}