FKIE_CVE-2026-90188

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-17 17:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: null_blk: free global tag_set on init error path If shared_tags is enabled, null_setup_tagset() allocates the global tag_set via null_init_global_tag_set(). If device creation later fails, err_dev destroys the default devices and calls unregister_blkdev(), but never frees the global tag_set. Since module init failed, null_exit() is never invoked, so the global tag_set's tags and maps are permanently leaked. Free the global tag_set in err_dev, matching null_exit() which does if (tag_set.ops) blk_mq_free_tag_set(&tag_set).
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/081cf37e8a0e00cd91d6df53172c9d928790a798
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0b2faa330184340d9418ad2c627c2ae881772e33
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2882e1450fa4597811a951196e07553ea134eb31
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2b59484ac1e64dd78dbe8c6140891c6308085a75
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a1c5ff3a49ba93a1fd0b70537e7a0164071760d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/665c94554ff0d5d88caae7f40c16c8e0a3369eda
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/null_blk/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0b2faa330184340d9418ad2c627c2ae881772e33",
              "status": "affected",
              "version": "82f402fefa50f1675bf918bcd009981bd6b30ac8",
              "versionType": "git"
            },
            {
              "lessThan": "665c94554ff0d5d88caae7f40c16c8e0a3369eda",
              "status": "affected",
              "version": "82f402fefa50f1675bf918bcd009981bd6b30ac8",
              "versionType": "git"
            },
            {
              "lessThan": "2882e1450fa4597811a951196e07553ea134eb31",
              "status": "affected",
              "version": "82f402fefa50f1675bf918bcd009981bd6b30ac8",
              "versionType": "git"
            },
            {
              "lessThan": "2b59484ac1e64dd78dbe8c6140891c6308085a75",
              "status": "affected",
              "version": "82f402fefa50f1675bf918bcd009981bd6b30ac8",
              "versionType": "git"
            },
            {
              "lessThan": "081cf37e8a0e00cd91d6df53172c9d928790a798",
              "status": "affected",
              "version": "82f402fefa50f1675bf918bcd009981bd6b30ac8",
              "versionType": "git"
            },
            {
              "lessThan": "5a1c5ff3a49ba93a1fd0b70537e7a0164071760d",
              "status": "affected",
              "version": "82f402fefa50f1675bf918bcd009981bd6b30ac8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/null_blk/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.13"
            },
            {
              "lessThan": "4.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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\u0027s 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",
  "lastModified": "2026-09-17T17:17:13.397",
  "metrics": {},
  "published": "2026-09-17T17:17:13.397",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/081cf37e8a0e00cd91d6df53172c9d928790a798"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0b2faa330184340d9418ad2c627c2ae881772e33"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2882e1450fa4597811a951196e07553ea134eb31"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2b59484ac1e64dd78dbe8c6140891c6308085a75"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5a1c5ff3a49ba93a1fd0b70537e7a0164071760d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/665c94554ff0d5d88caae7f40c16c8e0a3369eda"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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