{"api_version":"1","generated_at":"2026-07-23T11:24:44+00:00","cve":"CVE-2026-23261","urls":{"html":"https://cve.report/CVE-2026-23261","api":"https://cve.report/api/cve/CVE-2026-23261.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23261","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23261"},"summary":{"title":"nvme-fc: release admin tagset if init fails","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-fc: release admin tagset if init fails\n\nnvme_fabrics creates an NVMe/FC controller in following path:\n\n    nvmf_dev_write()\n      -> nvmf_create_ctrl()\n        -> nvme_fc_create_ctrl()\n          -> nvme_fc_init_ctrl()\n\nnvme_fc_init_ctrl() allocates the admin blk-mq resources right after\nnvme_add_ctrl() succeeds.  If any of the subsequent steps fail (changing\nthe controller state, scheduling connect work, etc.), we jump to the\nfail_ctrl path, which tears down the controller references but never\nfrees the admin queue/tag set.  The leaked blk-mq allocations match the\nkmemleak report seen during blktests nvme/fc.\n\nCheck ctrl->ctrl.admin_tagset in the fail_ctrl path and call\nnvme_remove_admin_tag_set() when it is set so that all admin queue\nallocations are reclaimed whenever controller setup aborts.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-03-18 18:16:24","updated_at":"2026-03-19 17:16:22"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/fa301aef50e3f3b5be6ee53457608beae5aa7a01","name":"https://git.kernel.org/stable/c/fa301aef50e3f3b5be6ee53457608beae5aa7a01","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d1877cc7270302081a315a81a0ee8331f19f95c8","name":"https://git.kernel.org/stable/c/d1877cc7270302081a315a81a0ee8331f19f95c8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7c54d3f5ebbc5982daaa004260242dc07ac943ea","name":"https://git.kernel.org/stable/c/7c54d3f5ebbc5982daaa004260242dc07ac943ea","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e810b290922c535feb34bc90ab549446fe94d2a3","name":"https://git.kernel.org/stable/c/e810b290922c535feb34bc90ab549446fe94d2a3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23261","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23261","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5fe335a80548e2eda5d51fab801108b323600e95 7c54d3f5ebbc5982daaa004260242dc07ac943ea git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 17c3a66d7ea2d303f783796d62f99e2e23b68c90 fa301aef50e3f3b5be6ee53457608beae5aa7a01 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ea3442efabd0aa3930c5bab73c3901ef38ef6ac3 e810b290922c535feb34bc90ab549446fe94d2a3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ea3442efabd0aa3930c5bab73c3901ef38ef6ac3 d1877cc7270302081a315a81a0ee8331f19f95c8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0d1840b2dd8fe073c020c39bf8e8e89488070801 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.124 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.70 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.10 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"23261","cve":"CVE-2026-23261","epss":"0.000170000","percentile":"0.045840000","score_date":"2026-05-28","updated_at":"2026-05-29 00:13:16"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/nvme/host/fc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"7c54d3f5ebbc5982daaa004260242dc07ac943ea","status":"affected","version":"5fe335a80548e2eda5d51fab801108b323600e95","versionType":"git"},{"lessThan":"fa301aef50e3f3b5be6ee53457608beae5aa7a01","status":"affected","version":"17c3a66d7ea2d303f783796d62f99e2e23b68c90","versionType":"git"},{"lessThan":"e810b290922c535feb34bc90ab549446fe94d2a3","status":"affected","version":"ea3442efabd0aa3930c5bab73c3901ef38ef6ac3","versionType":"git"},{"lessThan":"d1877cc7270302081a315a81a0ee8331f19f95c8","status":"affected","version":"ea3442efabd0aa3930c5bab73c3901ef38ef6ac3","versionType":"git"},{"status":"affected","version":"0d1840b2dd8fe073c020c39bf8e8e89488070801","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/nvme/host/fc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.124","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.70","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.19","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.124","versionStartIncluding":"6.6.118","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.70","versionStartIncluding":"6.12.60","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.10","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-fc: release admin tagset if init fails\n\nnvme_fabrics creates an NVMe/FC controller in following path:\n\n    nvmf_dev_write()\n      -> nvmf_create_ctrl()\n        -> nvme_fc_create_ctrl()\n          -> nvme_fc_init_ctrl()\n\nnvme_fc_init_ctrl() allocates the admin blk-mq resources right after\nnvme_add_ctrl() succeeds.  If any of the subsequent steps fail (changing\nthe controller state, scheduling connect work, etc.), we jump to the\nfail_ctrl path, which tears down the controller references but never\nfrees the admin queue/tag set.  The leaked blk-mq allocations match the\nkmemleak report seen during blktests nvme/fc.\n\nCheck ctrl->ctrl.admin_tagset in the fail_ctrl path and call\nnvme_remove_admin_tag_set() when it is set so that all admin queue\nallocations are reclaimed whenever controller setup aborts."}],"providerMetadata":{"dateUpdated":"2026-05-11T22:03:26.311Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/7c54d3f5ebbc5982daaa004260242dc07ac943ea"},{"url":"https://git.kernel.org/stable/c/fa301aef50e3f3b5be6ee53457608beae5aa7a01"},{"url":"https://git.kernel.org/stable/c/e810b290922c535feb34bc90ab549446fe94d2a3"},{"url":"https://git.kernel.org/stable/c/d1877cc7270302081a315a81a0ee8331f19f95c8"}],"title":"nvme-fc: release admin tagset if init fails","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23261","datePublished":"2026-03-18T17:41:07.478Z","dateReserved":"2026-01-13T15:37:45.990Z","dateUpdated":"2026-05-11T22:03:26.311Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-03-18 18:16:24","lastModifiedDate":"2026-03-19 17:16:22","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23261","Ordinal":"1","Title":"nvme-fc: release admin tagset if init fails","CVE":"CVE-2026-23261","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23261","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-fc: release admin tagset if init fails\n\nnvme_fabrics creates an NVMe/FC controller in following path:\n\n    nvmf_dev_write()\n      -> nvmf_create_ctrl()\n        -> nvme_fc_create_ctrl()\n          -> nvme_fc_init_ctrl()\n\nnvme_fc_init_ctrl() allocates the admin blk-mq resources right after\nnvme_add_ctrl() succeeds.  If any of the subsequent steps fail (changing\nthe controller state, scheduling connect work, etc.), we jump to the\nfail_ctrl path, which tears down the controller references but never\nfrees the admin queue/tag set.  The leaked blk-mq allocations match the\nkmemleak report seen during blktests nvme/fc.\n\nCheck ctrl->ctrl.admin_tagset in the fail_ctrl path and call\nnvme_remove_admin_tag_set() when it is set so that all admin queue\nallocations are reclaimed whenever controller setup aborts.","Type":"Description","Title":"nvme-fc: release admin tagset if init fails"}]}}}