{"api_version":"1","generated_at":"2026-11-12T03:53:34+00:00","cve":"CVE-2026-90185","urls":{"html":"https://cve.report/CVE-2026-90185","api":"https://cve.report/api/cve/CVE-2026-90185.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90185","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90185"},"summary":{"title":"null_blk: serialize configfs attribute stores with the lock","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: serialize configfs attribute stores with the lock\n\nThe NULLB_DEVICE_ATTR _store takes no lock: apply_fn attributes\n(submit_queues, poll_queues) get dev->NAME written again after apply_fn\nreturns, outside its lock; APPLY=NULL attributes are entirely lockless.\nconfigfs only serializes stores per-open-file, so concurrent stores on\nseparate fds race.\n\nFor apply_fn attributes, once one store's apply_fn has reconfigured the\nhardware, a second (losing) store can still overwrite dev->NAME\nafterwards. This leaves dev->submit_queues out of sync with the live\nqueue count, which is later caught by the WARN_ON_ONCE() in\nnull_map_queues().\n\nFor !apply_fn attributes, power_store()'s null_add_dev() validates and\nbuilds the device under \"lock\" but only sets CONFIGURED afterwards. A store\nslipping in during this window can change a field mid-setup -- for example,\nzone_nr_conv can be pushed above nr_zones after it has already been\nclamped, leading to an out-of-bounds dev->zones[] access.\n\nTake \"lock\" in the macro around the apply_fn call, the CONFIGURED test and\nthe field write, and move it out of nullb_apply_submit_queues()/\nnullb_apply_poll_queues() so both paths are covered once. This serializes\nstores with power_store's setup and with each other.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:12","updated_at":"2026-10-19 09:19:08"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/88d806d0e1d36246208386a8e55b511c1b3d647c","name":"https://git.kernel.org/stable/c/88d806d0e1d36246208386a8e55b511c1b3d647c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/65cae82fd3c39b53430672cb9e3ecd267471a6ce","name":"https://git.kernel.org/stable/c/65cae82fd3c39b53430672cb9e3ecd267471a6ce","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3945ce8cbce4e328e6fdf0b522dc71e340de19db","name":"https://git.kernel.org/stable/c/3945ce8cbce4e328e6fdf0b522dc71e340de19db","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7e7fff51808237703a3a1df6dd5cae1dfd1db86d","name":"https://git.kernel.org/stable/c/7e7fff51808237703a3a1df6dd5cae1dfd1db86d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8e839ed5210399a0330a8a6c5885c1d40a537c6d","name":"https://git.kernel.org/stable/c/8e839ed5210399a0330a8a6c5885c1d40a537c6d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c70994c2862b05e44728912b2ea9487d31e2aea7","name":"https://git.kernel.org/stable/c/c70994c2862b05e44728912b2ea9487d31e2aea7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90185","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90185","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45919fbfe1c487c17ea1d198534339a5e8abeae3 8e839ed5210399a0330a8a6c5885c1d40a537c6d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45919fbfe1c487c17ea1d198534339a5e8abeae3 88d806d0e1d36246208386a8e55b511c1b3d647c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45919fbfe1c487c17ea1d198534339a5e8abeae3 3945ce8cbce4e328e6fdf0b522dc71e340de19db git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45919fbfe1c487c17ea1d198534339a5e8abeae3 65cae82fd3c39b53430672cb9e3ecd267471a6ce git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45919fbfe1c487c17ea1d198534339a5e8abeae3 c70994c2862b05e44728912b2ea9487d31e2aea7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45919fbfe1c487c17ea1d198534339a5e8abeae3 7e7fff51808237703a3a1df6dd5cae1dfd1db86d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.5","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/block/null_blk/main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8e839ed5210399a0330a8a6c5885c1d40a537c6d","status":"affected","version":"45919fbfe1c487c17ea1d198534339a5e8abeae3","versionType":"git"},{"lessThan":"88d806d0e1d36246208386a8e55b511c1b3d647c","status":"affected","version":"45919fbfe1c487c17ea1d198534339a5e8abeae3","versionType":"git"},{"lessThan":"3945ce8cbce4e328e6fdf0b522dc71e340de19db","status":"affected","version":"45919fbfe1c487c17ea1d198534339a5e8abeae3","versionType":"git"},{"lessThan":"65cae82fd3c39b53430672cb9e3ecd267471a6ce","status":"affected","version":"45919fbfe1c487c17ea1d198534339a5e8abeae3","versionType":"git"},{"lessThan":"c70994c2862b05e44728912b2ea9487d31e2aea7","status":"affected","version":"45919fbfe1c487c17ea1d198534339a5e8abeae3","versionType":"git"},{"lessThan":"7e7fff51808237703a3a1df6dd5cae1dfd1db86d","status":"affected","version":"45919fbfe1c487c17ea1d198534339a5e8abeae3","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/block/null_blk/main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.5"},{"lessThan":"5.5","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"5.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: serialize configfs attribute stores with the lock\n\nThe NULLB_DEVICE_ATTR _store takes no lock: apply_fn attributes\n(submit_queues, poll_queues) get dev->NAME written again after apply_fn\nreturns, outside its lock; APPLY=NULL attributes are entirely lockless.\nconfigfs only serializes stores per-open-file, so concurrent stores on\nseparate fds race.\n\nFor apply_fn attributes, once one store's apply_fn has reconfigured the\nhardware, a second (losing) store can still overwrite dev->NAME\nafterwards. This leaves dev->submit_queues out of sync with the live\nqueue count, which is later caught by the WARN_ON_ONCE() in\nnull_map_queues().\n\nFor !apply_fn attributes, power_store()'s null_add_dev() validates and\nbuilds the device under \"lock\" but only sets CONFIGURED afterwards. A store\nslipping in during this window can change a field mid-setup -- for example,\nzone_nr_conv can be pushed above nr_zones after it has already been\nclamped, leading to an out-of-bounds dev->zones[] access.\n\nTake \"lock\" in the macro around the apply_fn call, the CONFIGURED test and\nthe field write, and move it out of nullb_apply_submit_queues()/\nnullb_apply_poll_queues() so both paths are covered once. This serializes\nstores with power_store's setup and with each other."}],"providerMetadata":{"dateUpdated":"2026-10-19T08:59:22.077Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/8e839ed5210399a0330a8a6c5885c1d40a537c6d"},{"url":"https://git.kernel.org/stable/c/88d806d0e1d36246208386a8e55b511c1b3d647c"},{"url":"https://git.kernel.org/stable/c/3945ce8cbce4e328e6fdf0b522dc71e340de19db"},{"url":"https://git.kernel.org/stable/c/65cae82fd3c39b53430672cb9e3ecd267471a6ce"},{"url":"https://git.kernel.org/stable/c/c70994c2862b05e44728912b2ea9487d31e2aea7"},{"url":"https://git.kernel.org/stable/c/7e7fff51808237703a3a1df6dd5cae1dfd1db86d"}],"title":"null_blk: serialize configfs attribute stores with the lock","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90185","datePublished":"2026-09-17T16:07:08.392Z","dateReserved":"2026-09-11T19:38:34.791Z","dateUpdated":"2026-10-19T08:59:22.077Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:12","lastModifiedDate":"2026-10-19 09:19:08","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90185","Ordinal":"1","Title":"null_blk: serialize configfs attribute stores with the lock","CVE":"CVE-2026-90185","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90185","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: serialize configfs attribute stores with the lock\n\nThe NULLB_DEVICE_ATTR _store takes no lock: apply_fn attributes\n(submit_queues, poll_queues) get dev->NAME written again after apply_fn\nreturns, outside its lock; APPLY=NULL attributes are entirely lockless.\nconfigfs only serializes stores per-open-file, so concurrent stores on\nseparate fds race.\n\nFor apply_fn attributes, once one store's apply_fn has reconfigured the\nhardware, a second (losing) store can still overwrite dev->NAME\nafterwards. This leaves dev->submit_queues out of sync with the live\nqueue count, which is later caught by the WARN_ON_ONCE() in\nnull_map_queues().\n\nFor !apply_fn attributes, power_store()'s null_add_dev() validates and\nbuilds the device under \"lock\" but only sets CONFIGURED afterwards. A store\nslipping in during this window can change a field mid-setup -- for example,\nzone_nr_conv can be pushed above nr_zones after it has already been\nclamped, leading to an out-of-bounds dev->zones[] access.\n\nTake \"lock\" in the macro around the apply_fn call, the CONFIGURED test and\nthe field write, and move it out of nullb_apply_submit_queues()/\nnullb_apply_poll_queues() so both paths are covered once. This serializes\nstores with power_store's setup and with each other.","Type":"Description","Title":"null_blk: serialize configfs attribute stores with the lock"}]}}}