CVE-2026-89972

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: nvme: add missing SRCU grace period in error path nvme_alloc_ns() error path at out_unlink_ns removes ns from the namespace head siblings list with list_del_rcu(&ns->siblings) but does not wait for SRCU readers before freeing the namespace struct. Multipath code iterates the head->list under srcu_read_lock() in nvme_find_path() and nvme_mpath_revalidate_paths(), so a concurrent reader can still hold a reference to ns when kfree(ns) runs. The normal removal path in nvme_ns_remove() correctly calls synchronize_srcu(&ns->head->srcu) after list_del_rcu() to wait for in-progress readers. Add the same grace period in the error path.

Severity

CRITICAL

CVSS score

9.8 (v3.1)

Vulnerability status

Received

Source identifier

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

Published

2026-09-16 11:17:07.953000

Last modified

2026-10-30 13:20:37.400000

View original CVE JSON

{
  "id": "CVE-2026-89972",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-16T11:17:07.953",
  "lastModified": "2026-10-30T13:20:37.400",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: add missing SRCU grace period in error path\n\nnvme_alloc_ns() error path at out_unlink_ns removes ns from the\nnamespace head siblings list with list_del_rcu(&ns->siblings) but\ndoes not wait for SRCU readers before freeing the namespace struct.\nMultipath code iterates the head->list under srcu_read_lock() in\nnvme_find_path() and nvme_mpath_revalidate_paths(), so a concurrent\nreader can still hold a reference to ns when kfree(ns) runs.\n\nThe normal removal path in nvme_ns_remove() correctly calls\nsynchronize_srcu(&ns->head->srcu) after list_del_rcu() to wait for\nin-progress readers. Add the same grace period in the error path."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/nvme/host/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498",
              "lessThan": "037e71058e8a59568db72015d4386f54e54dff77",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498",
              "lessThan": "7f180cef9f3421ece85c43bfdc326ce5875845bb",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498",
              "lessThan": "da710ec2a70a85de73afd4f7869b234fd9ede49e",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498",
              "lessThan": "3868476cd39161f18720582df17a1b621e805b5d",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498",
              "lessThan": "0d4735418512ef825176726eaaa8bd6a35f6b46d",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498",
              "lessThan": "d663944dbad81bb0e3635d7090db4713e6300858",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498",
              "lessThan": "76023560d60f10b4f808941163aa2975f1631683",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498",
              "lessThan": "ef248d5de4469fb6bbaf8dbe0c4c47800080d648",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/nvme/host/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "4.15",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "4.15",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.273",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.224",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.112",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.51",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.5",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/037e71058e8a59568db72015d4386f54e54dff77",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/0d4735418512ef825176726eaaa8bd6a35f6b46d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3868476cd39161f18720582df17a1b621e805b5d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/76023560d60f10b4f808941163aa2975f1631683",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7f180cef9f3421ece85c43bfdc326ce5875845bb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d663944dbad81bb0e3635d7090db4713e6300858",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/da710ec2a70a85de73afd4f7869b234fd9ede49e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ef248d5de4469fb6bbaf8dbe0c4c47800080d648",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}