{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90185","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.791Z","datePublished":"2026-09-17T16:07:08.392Z","dateUpdated":"2026-09-17T16:07:08.392Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-17T16:07:08.392Z"},"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/null_blk/main.c"],"versions":[{"version":"45919fbfe1c487c17ea1d198534339a5e8abeae3","lessThan":"8e839ed5210399a0330a8a6c5885c1d40a537c6d","status":"affected","versionType":"git"},{"version":"45919fbfe1c487c17ea1d198534339a5e8abeae3","lessThan":"88d806d0e1d36246208386a8e55b511c1b3d647c","status":"affected","versionType":"git"},{"version":"45919fbfe1c487c17ea1d198534339a5e8abeae3","lessThan":"3945ce8cbce4e328e6fdf0b522dc71e340de19db","status":"affected","versionType":"git"},{"version":"45919fbfe1c487c17ea1d198534339a5e8abeae3","lessThan":"65cae82fd3c39b53430672cb9e3ecd267471a6ce","status":"affected","versionType":"git"},{"version":"45919fbfe1c487c17ea1d198534339a5e8abeae3","lessThan":"c70994c2862b05e44728912b2ea9487d31e2aea7","status":"affected","versionType":"git"},{"version":"45919fbfe1c487c17ea1d198534339a5e8abeae3","lessThan":"7e7fff51808237703a3a1df6dd5cae1dfd1db86d","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/null_blk/main.c"],"versions":[{"version":"5.5","status":"affected"},{"version":"0","lessThan":"5.5","status":"unaffected","versionType":"semver"},{"version":"6.1.188","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.52","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.6","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.3-rc1"}]}]}],"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"}}}}