null_blk: free global tag_set on init error path
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).
CVE-2026-90188
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90188
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"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"
}
],
"programFiles": [
"drivers/block/null_blk/main.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/block/null_blk/main.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90188
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36564 · Revision 1
- Added to Heist Feed
- Publisher date