{"id":"CVE-2026-90188","published":"2026-09-17T17:17:13.397","lastModified":"2026-09-17T17:17:13.397","description":"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).","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/081cf37e8a0e00cd91d6df53172c9d928790a798","tags":[]},{"url":"https://git.kernel.org/stable/c/0b2faa330184340d9418ad2c627c2ae881772e33","tags":[]},{"url":"https://git.kernel.org/stable/c/2882e1450fa4597811a951196e07553ea134eb31","tags":[]},{"url":"https://git.kernel.org/stable/c/2b59484ac1e64dd78dbe8c6140891c6308085a75","tags":[]},{"url":"https://git.kernel.org/stable/c/5a1c5ff3a49ba93a1fd0b70537e7a0164071760d","tags":[]},{"url":"https://git.kernel.org/stable/c/665c94554ff0d5d88caae7f40c16c8e0a3369eda","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}