{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "82f402fefa50f1675bf918bcd009981bd6b30ac8"
            },
            {
              "fixed": "0b2faa330184340d9418ad2c627c2ae881772e33"
            },
            {
              "fixed": "665c94554ff0d5d88caae7f40c16c8e0a3369eda"
            },
            {
              "fixed": "2882e1450fa4597811a951196e07553ea134eb31"
            },
            {
              "fixed": "2b59484ac1e64dd78dbe8c6140891c6308085a75"
            },
            {
              "fixed": "081cf37e8a0e00cd91d6df53172c9d928790a798"
            },
            {
              "fixed": "5a1c5ff3a49ba93a1fd0b70537e7a0164071760d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.13.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90188.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: free global tag_set on init error path\n\nIf shared_tags is enabled, null_setup_tagset() allocates the global tag_set\nvia null_init_global_tag_set(). If device creation later fails, err_dev\ndestroys the default devices and calls unregister_blkdev(), but never frees\nthe global tag_set. Since module init failed, null_exit() is never invoked,\nso the global tag_set's tags and maps are permanently leaked.\n\nFree the global tag_set in err_dev, matching null_exit() which does\nif (tag_set.ops) blk_mq_free_tag_set(\u0026tag_set).",
  "id": "CVE-2026-90188",
  "modified": "2026-09-19T03:30:23.347869856Z",
  "published": "2026-09-17T16:07:10.349Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/081cf37e8a0e00cd91d6df53172c9d928790a798"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b2faa330184340d9418ad2c627c2ae881772e33"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2882e1450fa4597811a951196e07553ea134eb31"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b59484ac1e64dd78dbe8c6140891c6308085a75"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a1c5ff3a49ba93a1fd0b70537e7a0164071760d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/665c94554ff0d5d88caae7f40c16c8e0a3369eda"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90188.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90188"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "null_blk: free global tag_set on init error path"
}