CVE-2026-90206

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90206", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.793Z", "datePublished": "2026-09-17T16:07:22.173Z", "dateUpdated": "2026-10-30T12:34:46.536Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:34:46.536Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: fix max_qid race between configfs and controller allocation\n\nThe function nvmet_subsys_attr_qid_max_store() can race against\nnvmet_alloc_ctrl() when a subsystem's max_qid limit is modified.\n\nSuppose max_qid is currently 64. If nvmet_alloc_ctrl() executes:\nctrl->sqs = kzalloc_objs(struct nvmet_sq *, subsys->max_qid + 1);\nand at this exact point, a userspace process changes max_qid to 128,\nnvmet_subsys_attr_qid_max_store() will set the new max_qid value. It\nattempts to delete active controllers to force a reconnect, but the\nnew controller won't be deleted because it hasn't been added to the\nsubsys->ctrls list yet.\n\nnvmet_alloc_ctrl() then proceeds and adds the new controller to the\nsubsys->ctrls list. Later, when nvmet_install_queue() is called, it\nwill see max_qid set to 128, but the memory allocated for sqs is only\nsized for 64 entries. This results in a KASAN out-of-bounds warning\nand potential memory corruptions.\n\nFix this by protecting the queue allocations and list insertion in\nnvmet_alloc_ctrl() with down_read(&nvmet_config_sem). Because\nnvmet_subsys_attr_qid_max_store() acquires down_write(&nvmet_config_sem)\nto modify the attribute, this safely prevents the configfs writer from\nmodifying max_qid during controller creation.\n\nCopy the max_qid from the subsystem to the controller's structure\nduring the allocation; ctrl->max_qid never changes as long as the\ncontroller remains in LIVE state, so this will prevent similar race\nconditions."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/admin-cmd.c", "drivers/nvme/target/core.c", "drivers/nvme/target/fabrics-cmd.c", "drivers/nvme/target/nvmet.h", "drivers/nvme/target/pci-epf.c"], "versions": [{"version": "3e980f5995e0bb4d86fef873a9c9ad66721580d0", "lessThan": "cae0f5ed6ce7af3f7e0003c417f1953a350f55bf", "status": "affected", "versionType": "git"}, {"version": "3e980f5995e0bb4d86fef873a9c9ad66721580d0", "lessThan": "af811970da4f0a928f5a1b1a946a04f755ce86f2", "status": "affected", "versionType": "git"}, {"version": "3e980f5995e0bb4d86fef873a9c9ad66721580d0", "lessThan": "a1b88a1782eb6b368071dcda548a41b5c23d8cd2", "status": "affected", "versionType": "git"}, {"version": "3e980f5995e0bb4d86fef873a9c9ad66721580d0", "lessThan": "6e6f8e3bfc66dff1833a48ecfd857268cff3be84", "status": "affected", "versionType": "git"}, {"version": "3e980f5995e0bb4d86fef873a9c9ad66721580d0", "lessThan": "2c23fc91789dfd9db746edb3ae9b90d65fabd410", "status": "affected", "versionType": "git"}, {"version": "3e980f5995e0bb4d86fef873a9c9ad66721580d0", "lessThan": "f1a8846e06388113dfdbb89dee005083fa9afdf9", "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/nvme/target/admin-cmd.c", "drivers/nvme/target/core.c", "drivers/nvme/target/fabrics-cmd.c", "drivers/nvme/target/nvmet.h", "drivers/nvme/target/pci-epf.c"], "versions": [{"version": "6.1", "status": "affected"}, {"version": "0", "lessThan": "6.1", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "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": "6.1", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/cae0f5ed6ce7af3f7e0003c417f1953a350f55bf"}, {"url": "https://git.kernel.org/stable/c/af811970da4f0a928f5a1b1a946a04f755ce86f2"}, {"url": "https://git.kernel.org/stable/c/a1b88a1782eb6b368071dcda548a41b5c23d8cd2"}, {"url": "https://git.kernel.org/stable/c/6e6f8e3bfc66dff1833a48ecfd857268cff3be84"}, {"url": "https://git.kernel.org/stable/c/2c23fc91789dfd9db746edb3ae9b90d65fabd410"}, {"url": "https://git.kernel.org/stable/c/f1a8846e06388113dfdbb89dee005083fa9afdf9"}], "title": "nvmet: fix max_qid race between configfs and controller allocation", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/nvme/target/admin-cmd.c", "drivers/nvme/target/core.c", "drivers/nvme/target/fabrics-cmd.c", "drivers/nvme/target/nvmet.h", "drivers/nvme/target/pci-epf.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "cae0f5ed6ce7af3f7e0003c417f1953a350f55bf", "status": "affected", "version": "3e980f5995e0bb4d86fef873a9c9ad66721580d0", "versionType": "git"}, {"lessThan": "af811970da4f0a928f5a1b1a946a04f755ce86f2", "status": "affected", "version": "3e980f5995e0bb4d86fef873a9c9ad66721580d0", "versionType": "git"}, {"lessThan": "a1b88a1782eb6b368071dcda548a41b5c23d8cd2", "status": "affected", "version": "3e980f5995e0bb4d86fef873a9c9ad66721580d0", "versionType": "git"}, {"lessThan": "6e6f8e3bfc66dff1833a48ecfd857268cff3be84", "status": "affected", "version": "3e980f5995e0bb4d86fef873a9c9ad66721580d0", "versionType": "git"}, {"lessThan": "2c23fc91789dfd9db746edb3ae9b90d65fabd410", "status": "affected", "version": "3e980f5995e0bb4d86fef873a9c9ad66721580d0", "versionType": "git"}, {"lessThan": "f1a8846e06388113dfdbb89dee005083fa9afdf9", "status": "affected", "version": "3e980f5995e0bb4d86fef873a9c9ad66721580d0", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/nvme/target/admin-cmd.c", "drivers/nvme/target/core.c", "drivers/nvme/target/fabrics-cmd.c", "drivers/nvme/target/nvmet.h", "drivers/nvme/target/pci-epf.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.1"}, {"lessThan": "6.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "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\nnvmet: fix max_qid race between configfs and controller allocation\n\nThe function nvmet_subsys_attr_qid_max_store() can race against\nnvmet_alloc_ctrl() when a subsystem's max_qid limit is modified.\n\nSuppose max_qid is currently 64. If nvmet_alloc_ctrl() executes:\nctrl->sqs = kzalloc_objs(struct nvmet_sq *, subsys->max_qid + 1);\nand at this exact point, a userspace process changes max_qid to 128,\nnvmet_subsys_attr_qid_max_store() will set the new max_qid value. It\nattempts to delete active controllers to force a reconnect, but the\nnew controller won't be deleted because it hasn't been added to the\nsubsys->ctrls list yet.\n\nnvmet_alloc_ctrl() then proceeds and adds the new controller to the\nsubsys->ctrls list. Later, when nvmet_install_queue() is called, it\nwill see max_qid set to 128, but the memory allocated for sqs is only\nsized for 64 entries. This results in a KASAN out-of-bounds warning\nand potential memory corruptions.\n\nFix this by protecting the queue allocations and list insertion in\nnvmet_alloc_ctrl() with down_read(&nvmet_config_sem). Because\nnvmet_subsys_attr_qid_max_store() acquires down_write(&nvmet_config_sem)\nto modify the attribute, this safely prevents the configfs writer from\nmodifying max_qid during controller creation.\n\nCopy the max_qid from the subsystem to the controller's structure\nduring the allocation; ctrl->max_qid never changes as long as the\ncontroller remains in LIVE state, so this will prevent similar race\nconditions."}], "id": "CVE-2026-90206", "lastModified": "2026-10-30T13:20:46.387", "metrics": {}, "published": "2026-09-17T17:17:15.700", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2c23fc91789dfd9db746edb3ae9b90d65fabd410"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e6f8e3bfc66dff1833a48ecfd857268cff3be84"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a1b88a1782eb6b368071dcda548a41b5c23d8cd2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/af811970da4f0a928f5a1b1a946a04f755ce86f2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cae0f5ed6ce7af3f7e0003c417f1953a350f55bf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f1a8846e06388113dfdbb89dee005083fa9afdf9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3e980f5995e0bb4d86fef873a9c9ad66721580d0,2c23fc91789dfd9db746edb3ae9b90d65fabd410)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3e980f5995e0bb4d86fef873a9c9ad66721580d0,f1a8846e06388113dfdbb89dee005083fa9afdf9)"}}], "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": "6.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.1)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "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": "2026-09-18T20:02:04.471011+00:00", "updated": "2026-09-19T03:30:18.171771+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362", "CWE-788"]}