{"id":"CVE-2026-90188","revision":"476ab5259b174a11b8b871247428eb43","records":[{"revision":"476ab5259b174a11b8b871247428eb43","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90188","aliases":[],"title":"null_blk: free global tag_set on init error path","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).","state":0,"publishedAt":"2026-09-17T16:07:10.349+00:00","modifiedAt":"2026-10-19T08:59:24.972+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/block/null_blk/main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"82f402fefa50f1675bf918bcd009981bd6b30ac8\",\n                            \"lessThan\": \"0b2faa330184340d9418ad2c627c2ae881772e33\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82f402fefa50f1675bf918bcd009981bd6b30ac8\",\n                            \"lessThan\": \"665c94554ff0d5d88caae7f40c16c8e0a3369eda\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82f402fefa50f1675bf918bcd009981bd6b30ac8\",\n                            \"lessThan\": \"2882e1450fa4597811a951196e07553ea134eb31\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82f402fefa50f1675bf918bcd009981bd6b30ac8\",\n                            \"lessThan\": \"2b59484ac1e64dd78dbe8c6140891c6308085a75\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82f402fefa50f1675bf918bcd009981bd6b30ac8\",\n                            \"lessThan\": \"081cf37e8a0e00cd91d6df53172c9d928790a798\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82f402fefa50f1675bf918bcd009981bd6b30ac8\",\n                            \"lessThan\": \"5a1c5ff3a49ba93a1fd0b70537e7a0164071760d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/block/null_blk/main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.13\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90188","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90188","identifiers":["CVE-2026-90188"]},"retained":false,"historicalAffected":[]}],"coverage":[]}