GHSA-JMG2-QCVP-F7GG
Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:31In 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).
{
"affected": [],
"aliases": [
"CVE-2026-90188"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:13Z",
"severity": null
},
"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\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": "GHSA-jmg2-qcvp-f7gg",
"modified": "2026-09-17T18:31:54Z",
"published": "2026-09-17T18:31:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90188"
},
{
"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"
}
],
"schema_version": "1.4.0",
"severity": []
}
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