{"id":"CVE-2026-90188","state":"PUBLISHED","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).","publishedAt":"2026-09-17T16:07:10.349Z","updatedAt":"2026-10-19T08:59:24.972Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"82f402fefa50f1675bf918bcd009981bd6b30ac8","status":"affected","lessThan":"0b2faa330184340d9418ad2c627c2ae881772e33","versionType":"git"},{"version":"82f402fefa50f1675bf918bcd009981bd6b30ac8","status":"affected","lessThan":"665c94554ff0d5d88caae7f40c16c8e0a3369eda","versionType":"git"},{"version":"82f402fefa50f1675bf918bcd009981bd6b30ac8","status":"affected","lessThan":"2882e1450fa4597811a951196e07553ea134eb31","versionType":"git"},{"version":"82f402fefa50f1675bf918bcd009981bd6b30ac8","status":"affected","lessThan":"2b59484ac1e64dd78dbe8c6140891c6308085a75","versionType":"git"},{"version":"82f402fefa50f1675bf918bcd009981bd6b30ac8","status":"affected","lessThan":"081cf37e8a0e00cd91d6df53172c9d928790a798","versionType":"git"},{"version":"82f402fefa50f1675bf918bcd009981bd6b30ac8","status":"affected","lessThan":"5a1c5ff3a49ba93a1fd0b70537e7a0164071760d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/null_blk/main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.13","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/null_blk/main.c"]}],"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"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90188.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90188","state":"PUBLISHED","datePublished":"2026-09-17T16:07:10.349Z","dateUpdated":"2026-10-19T08:59:24.972Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.791Z"},"containers":{"cna":{"title":"null_blk: free global tag_set on init error path","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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"82f402fefa50f1675bf918bcd009981bd6b30ac8","status":"affected","lessThan":"0b2faa330184340d9418ad2c627c2ae881772e33","versionType":"git"},{"version":"82f402fefa50f1675bf918bcd009981bd6b30ac8","status":"affected","lessThan":"665c94554ff0d5d88caae7f40c16c8e0a3369eda","versionType":"git"},{"version":"82f402fefa50f1675bf918bcd009981bd6b30ac8","status":"affected","lessThan":"2882e1450fa4597811a951196e07553ea134eb31","versionType":"git"},{"version":"82f402fefa50f1675bf918bcd009981bd6b30ac8","status":"affected","lessThan":"2b59484ac1e64dd78dbe8c6140891c6308085a75","versionType":"git"},{"version":"82f402fefa50f1675bf918bcd009981bd6b30ac8","status":"affected","lessThan":"081cf37e8a0e00cd91d6df53172c9d928790a798","versionType":"git"},{"version":"82f402fefa50f1675bf918bcd009981bd6b30ac8","status":"affected","lessThan":"5a1c5ff3a49ba93a1fd0b70537e7a0164071760d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/null_blk/main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.13","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/null_blk/main.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/0b2faa330184340d9418ad2c627c2ae881772e33"},{"url":"https://git.kernel.org/stable/c/665c94554ff0d5d88caae7f40c16c8e0a3369eda"},{"url":"https://git.kernel.org/stable/c/2882e1450fa4597811a951196e07553ea134eb31"},{"url":"https://git.kernel.org/stable/c/2b59484ac1e64dd78dbe8c6140891c6308085a75"},{"url":"https://git.kernel.org/stable/c/081cf37e8a0e00cd91d6df53172c9d928790a798"},{"url":"https://git.kernel.org/stable/c/5a1c5ff3a49ba93a1fd0b70537e7a0164071760d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:59:24.972Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}