net: mctp: i3c: serialize probe with bus removal

{
  "id": "e930efcdf52dc189c2a71d8959cd08f4aaf282d50b81d051a76cb27c7d93e0b9",
  "url": "https://osv.dev/vulnerability/CVE-2026-98018",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: mctp: i3c: serialize probe with bus removal",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: mctp: i3c: serialize probe with bus removal mctp_i3c_probe() drops busdevs_lock after finding the matching bus. A concurrent I3C_NOTIFY_BUS_REMOVE can then unregister and free the bus netdev before probe passes its private data to mctp_i3c_add_device(). The latter consequently adds a list node through a freed mbus pointer. Keep busdevs_lock held until the device has been added. This also satisfies the __must_hold annotation on mctp_i3c_add_device().",
    "evidence": "osv:CVE-2026-98018",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.111",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.53",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98018",
      "aliases": [
        "CVE-2026-98018"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c8755b29b58ec65be17bcb8c40763d2dcb1f1db5"
                },
                {
                  "fixed": "e6541b2747682fdb2c6ded4a7cf7c39c4067a35c"
                },
                {
                  "fixed": "765c5e357e67916a7aac8ead4ac2fa7d2bffe000"
                },
                {
                  "fixed": "906d8dbafabfa81a30e3ade420cb9912f223a5e1"
                },
                {
                  "fixed": "2b4707a149a55e8fa75c9ef32b359d60f470a566"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98018.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.111"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.53"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98018.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.958093296Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2b4707a149a55e8fa75c9ef32b359d60f470a566",
        "https://git.kernel.org/stable/c/765c5e357e67916a7aac8ead4ac2fa7d2bffe000",
        "https://git.kernel.org/stable/c/906d8dbafabfa81a30e3ade420cb9912f223a5e1",
        "https://git.kernel.org/stable/c/e6541b2747682fdb2c6ded4a7cf7c39c4067a35c",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98018.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98018",
        "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/2026/98xxx/CVE-2026-98018.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98018",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 494539,
  "published_at": "2026-09-25T10:23:39.706+00:00"
}