CVE-2026-90185

{"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": "2026-10-19T08:59:22.077Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:59:22.077Z"}, "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", "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"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-90185", "lastModified": "2026-10-19T09:19:08.500", "metrics": {}, "published": "2026-09-17T17:17:12.980", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3945ce8cbce4e328e6fdf0b522dc71e340de19db"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/65cae82fd3c39b53430672cb9e3ecd267471a6ce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7e7fff51808237703a3a1df6dd5cae1dfd1db86d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/88d806d0e1d36246208386a8e55b511c1b3d647c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8e839ed5210399a0330a8a6c5885c1d40a537c6d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c70994c2862b05e44728912b2ea9487d31e2aea7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[45919fbfe1c487c17ea1d198534339a5e8abeae3,8e839ed5210399a0330a8a6c5885c1d40a537c6d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[45919fbfe1c487c17ea1d198534339a5e8abeae3,88d806d0e1d36246208386a8e55b511c1b3d647c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[45919fbfe1c487c17ea1d198534339a5e8abeae3,3945ce8cbce4e328e6fdf0b522dc71e340de19db)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[45919fbfe1c487c17ea1d198534339a5e8abeae3,65cae82fd3c39b53430672cb9e3ecd267471a6ce)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[45919fbfe1c487c17ea1d198534339a5e8abeae3,c70994c2862b05e44728912b2ea9487d31e2aea7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[45919fbfe1c487c17ea1d198534339a5e8abeae3,7e7fff51808237703a3a1df6dd5cae1dfd1db86d)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.5"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.5)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-18T18:30:11.913029+00:00", "updated": "2026-09-20T03:15:08.053850+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362"]}