CVE-2026-98018

Full vulnerability record from the local CVENow database.

Description

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().

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-25 11:17:30.257000

Last modified

2026-10-19 10:17:55.673000

View original CVE JSON

{
  "id": "CVE-2026-98018",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-25T11:17:30.257",
  "lastModified": "2026-10-19T10:17:55.673",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mctp: i3c: serialize probe with bus removal\n\nmctp_i3c_probe() drops busdevs_lock after finding the matching bus. A\nconcurrent I3C_NOTIFY_BUS_REMOVE can then unregister and free the bus\nnetdev before probe passes its private data to mctp_i3c_add_device().\nThe latter consequently adds a list node through a freed mbus pointer.\n\nKeep busdevs_lock held until the device has been added. This also\nsatisfies the __must_hold annotation on mctp_i3c_add_device()."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/net/mctp/mctp-i3c.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "c8755b29b58ec65be17bcb8c40763d2dcb1f1db5",
              "lessThan": "e6541b2747682fdb2c6ded4a7cf7c39c4067a35c",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "c8755b29b58ec65be17bcb8c40763d2dcb1f1db5",
              "lessThan": "765c5e357e67916a7aac8ead4ac2fa7d2bffe000",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "c8755b29b58ec65be17bcb8c40763d2dcb1f1db5",
              "lessThan": "906d8dbafabfa81a30e3ade420cb9912f223a5e1",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "c8755b29b58ec65be17bcb8c40763d2dcb1f1db5",
              "lessThan": "2b4707a149a55e8fa75c9ef32b359d60f470a566",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/net/mctp/mctp-i3c.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.7",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.7",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.111",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.53",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.7",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2b4707a149a55e8fa75c9ef32b359d60f470a566",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/765c5e357e67916a7aac8ead4ac2fa7d2bffe000",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/906d8dbafabfa81a30e3ade420cb9912f223a5e1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e6541b2747682fdb2c6ded4a7cf7c39c4067a35c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}