CVE-2026-90188null_blk: free global tag_set on init error path
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No exploitation reported and no EPSS estimate yet.
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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).
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 82f402fefa50f1675bf918bcd009981bd6b30ac8 builds before 0b2faa330184340d9418ad2c627c2ae881772e33; from 82f402fefa50f1675bf918bcd009981bd6b30ac8 before 665c94554ff0d5d88caae7f40c16c8e0a3369eda; from 82f402fefa50f1675bf918bcd009981bd6b30ac8 before 2882e1450fa4597811a951196e07553ea134eb31; 82f402fefa50f1675bf918bcd009981bd6b30ac8 builds before 2b59484ac1e64dd78dbe8c6140891c6308085a75; 82f402fefa50f1675bf918bcd009981bd6b30ac8 builds before 081cf37e8a0e00cd91d6df53172c9d928790a798; 82f402fefa50f1675bf918bcd009981bd6b30ac8 builds before 5a1c5ff3a49ba93a1fd0b70537e7a0164071760d | CNA record |
References
- https://git.kernel.org/stable/c/0b2faa330184340d9418ad2c627c2ae881772e33
- https://git.kernel.org/stable/c/665c94554ff0d5d88caae7f40c16c8e0a3369eda
- https://git.kernel.org/stable/c/2882e1450fa4597811a951196e07553ea134eb31
- https://git.kernel.org/stable/c/2b59484ac1e64dd78dbe8c6140891c6308085a75
- https://git.kernel.org/stable/c/081cf37e8a0e00cd91d6df53172c9d928790a798
- https://git.kernel.org/stable/c/5a1c5ff3a49ba93a1fd0b70537e7a0164071760d
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.