CVE-2026-90188
Full vulnerability record from the local CVENow database.
Description
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).
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-17 17:17:13.397000
Last modified
2026-10-19 09:19:08.810000
View original CVE JSON
{
"id": "CVE-2026-90188",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-17T17:17:13.397",
"lastModified": "2026-10-19T09:19:08.810",
"vulnStatus": "Received",
"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'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(&tag_set)."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/block/null_blk/main.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "82f402fefa50f1675bf918bcd009981bd6b30ac8",
"lessThan": "0b2faa330184340d9418ad2c627c2ae881772e33",
"versionType": "git",
"status": "affected"
},
{
"version": "82f402fefa50f1675bf918bcd009981bd6b30ac8",
"lessThan": "665c94554ff0d5d88caae7f40c16c8e0a3369eda",
"versionType": "git",
"status": "affected"
},
{
"version": "82f402fefa50f1675bf918bcd009981bd6b30ac8",
"lessThan": "2882e1450fa4597811a951196e07553ea134eb31",
"versionType": "git",
"status": "affected"
},
{
"version": "82f402fefa50f1675bf918bcd009981bd6b30ac8",
"lessThan": "2b59484ac1e64dd78dbe8c6140891c6308085a75",
"versionType": "git",
"status": "affected"
},
{
"version": "82f402fefa50f1675bf918bcd009981bd6b30ac8",
"lessThan": "081cf37e8a0e00cd91d6df53172c9d928790a798",
"versionType": "git",
"status": "affected"
},
{
"version": "82f402fefa50f1675bf918bcd009981bd6b30ac8",
"lessThan": "5a1c5ff3a49ba93a1fd0b70537e7a0164071760d",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/block/null_blk/main.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "4.13",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.13",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.188",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.110",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.52",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.6",
"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/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",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}