CVE-2026-97409

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97409", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T14:53:16.867Z", "datePublished": "2026-09-24T16:03:16.195Z", "dateUpdated": "2026-10-30T12:36:54.217Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:36:54.217Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-fc: Do not cancel requests in io target before it is initialized\n\nA new nvme-fc controller in CONNECTING state sees admin request timeout\nschedules ctrl->ioerr_work to abort inflight requests. This ends up\ncalling __nvme_fc_abort_outstanding_ios() which aborts requests in both\nadmin and io tagsets. In case fc_ctrl->tag_set was not initialized we\nsee the warning below. This is because ctrl.queue_count is initialized\nearly in nvme_fc_alloc_ctrl().\n\nnvme nvme0: NVME-FC{0}: starting error recovery Connectivity Loss\nINFO: trying to register non-static key.\nThe code is fine but needs lockdep annotation, or maybe\nlpfc 0000:ab:00.0: queue 0 connect admin queue failed (-6).\nyou didn't initialize this object before use?\nturning off the locking correctness validator.\nWorkqueue: nvme-reset-wq nvme_fc_ctrl_ioerr_work [nvme_fc]\nCall Trace:\n <TASK>\n dump_stack_lvl+0x57/0x80\n register_lock_class+0x567/0x580\n __lock_acquire+0x330/0xb90\n lock_acquire.part.0+0xad/0x210\n blk_mq_tagset_busy_iter+0xf9/0xc00\n __nvme_fc_abort_outstanding_ios+0x23f/0x320 [nvme_fc]\n nvme_fc_ctrl_ioerr_work+0x172/0x210 [nvme_fc]\n process_one_work+0x82c/0x1450\n worker_thread+0x5ee/0xfd0\n kthread+0x3a0/0x750\n ret_from_fork+0x439/0x670\n ret_from_fork_asm+0x1a/0x30\n </TASK>\n\nUpdate the check in __nvme_fc_abort_outstanding_ios() confirm that io\ntagset was created before iterating over busy requests. Also make sure\nto cancel ctrl->ioerr_work before removing io tagset."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - A rogue NVMe-FC target stalls or errors the admin-queue FCP from nvmf_connect_admin_queue() in nvme_fc_create_association(); nvme_fc_fcpio_done() queues ctrl->ioerr_work, and nvme_fc_ctrl_ioerr_work() -> nvme_fc_error_recovery() (CONNECTING) reaches the patched __nvme_fc_abort_outstanding_ios(). FC/FCoE is a non-routable SAN fabric, so Adjacent.\nAC:L - nvme_fc_alloc_ctrl() sets queue_count > 1 before nvme_alloc_io_tag_set(), so CONNECTING has a zeroed embedded tag_set. The attacker creates that window by not completing the admin Connect FCP until nvme_fc_timeout()/nvme_fc_fcpio_done() runs; __nvme_fc_abort_outstanding_ios() then deterministically calls blk_mq_tagset_busy_iter(&ctrl->tag_set).\nPR:N - The attacker is an unauthenticated NVMe-FC N_Port; the host transport does not authenticate the remote port (fabric zoning only). nvmf-autoconnect writes /dev/nvme-fabrics as root after FC_EVENT=nvmediscovery, so the fabric peer needs no host account or capability.\nUI:N - nvme_fc_register_remoteport() calls nvme_fc_signal_discovery_scan(), which emits KOBJ_CHANGE with FC_EVENT=nvmediscovery; nvmf-autoconnect and nvmefc-boot-connections then write /dev/nvme-fabrics with no interactive administrator. The admin-FCP stall is the attacker's own action.\nS:U - srcu_read_lock() on the uninitialized tags_srcu and the tag_set teardown UAF corrupt host kernel per-CPU data and blk-mq tag memory in the same kernel; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - blk_mq_tagset_busy_iter() takes srcu_read_lock(&ctrl->tag_set.tags_srcu) on a kzalloc-zeroed tag_set, so __srcu_read_lock() this_cpu_inc()s a NULL srcu_ctrp. After nvme_alloc_io_tag_set(), nvme_fc_create_io_queues()'s error path also calls nvme_remove_io_tag_set() while nvme_reset_wq still iterates the live tag_set \u2014 a heap UAF.\nI:H - The NULL-srcu this_cpu_inc corrupts per-CPU words at offset 0 (x86 current_task is PER_CPU_CACHE_HOT). Concurrent blk_mq_free_tag_set() versus blk_mq_tagset_busy_iter() is a UAF of tag_set->tags and the SRCU sda; slab reuse of those objects yields a write/control-flow primitive.\nA:H - The report is lockdep in blk_mq_tagset_busy_iter() from __nvme_fc_abort_outstanding_ios() on the zeroed tag_set. Without lockdep, this_cpu_inc of a NULL per-CPU pointer and the nvme_remove_io_tag_set() UAF oops or panic the host and take down the NVMe-FC storage path."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/host/fc.c"], "versions": [{"version": "52793d62a696e9188092eb0817fb1219ee5729ff", "lessThan": "0b7c8009b3037722103032c336732d63e0507a51", "status": "affected", "versionType": "git"}, {"version": "52793d62a696e9188092eb0817fb1219ee5729ff", "lessThan": "5488e2706c58444a24e15773237dcc0bedcd771f", "status": "affected", "versionType": "git"}, {"version": "52793d62a696e9188092eb0817fb1219ee5729ff", "lessThan": "da930308b4bc24c335574e85ca84ff70a988cf05", "status": "affected", "versionType": "git"}, {"version": "52793d62a696e9188092eb0817fb1219ee5729ff", "lessThan": "dd39064d2948b14dbe4f364fe4b3c9cfc632cc21", "status": "affected", "versionType": "git"}, {"version": "52793d62a696e9188092eb0817fb1219ee5729ff", "lessThan": "ee38469f88492df99e1d97f03aa40ecfd218934f", "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/host/fc.c"], "versions": [{"version": "5.10", "status": "affected"}, {"version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "5.10", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0b7c8009b3037722103032c336732d63e0507a51"}, {"url": "https://git.kernel.org/stable/c/5488e2706c58444a24e15773237dcc0bedcd771f"}, {"url": "https://git.kernel.org/stable/c/da930308b4bc24c335574e85ca84ff70a988cf05"}, {"url": "https://git.kernel.org/stable/c/dd39064d2948b14dbe4f364fe4b3c9cfc632cc21"}, {"url": "https://git.kernel.org/stable/c/ee38469f88492df99e1d97f03aa40ecfd218934f"}], "title": "nvme-fc: Do not cancel requests in io target before it is initialized", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"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": "0b7c8009b3037722103032c336732d63e0507a51", "status": "affected", "version": "52793d62a696e9188092eb0817fb1219ee5729ff", "versionType": "git"}, {"lessThan": "5488e2706c58444a24e15773237dcc0bedcd771f", "status": "affected", "version": "52793d62a696e9188092eb0817fb1219ee5729ff", "versionType": "git"}, {"lessThan": "da930308b4bc24c335574e85ca84ff70a988cf05", "status": "affected", "version": "52793d62a696e9188092eb0817fb1219ee5729ff", "versionType": "git"}, {"lessThan": "dd39064d2948b14dbe4f364fe4b3c9cfc632cc21", "status": "affected", "version": "52793d62a696e9188092eb0817fb1219ee5729ff", "versionType": "git"}, {"lessThan": "ee38469f88492df99e1d97f03aa40ecfd218934f", "status": "affected", "version": "52793d62a696e9188092eb0817fb1219ee5729ff", "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": "5.10"}, {"lessThan": "5.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\nnvme-fc: Do not cancel requests in io target before it is initialized\n\nA new nvme-fc controller in CONNECTING state sees admin request timeout\nschedules ctrl->ioerr_work to abort inflight requests. This ends up\ncalling __nvme_fc_abort_outstanding_ios() which aborts requests in both\nadmin and io tagsets. In case fc_ctrl->tag_set was not initialized we\nsee the warning below. This is because ctrl.queue_count is initialized\nearly in nvme_fc_alloc_ctrl().\n\nnvme nvme0: NVME-FC{0}: starting error recovery Connectivity Loss\nINFO: trying to register non-static key.\nThe code is fine but needs lockdep annotation, or maybe\nlpfc 0000:ab:00.0: queue 0 connect admin queue failed (-6).\nyou didn't initialize this object before use?\nturning off the locking correctness validator.\nWorkqueue: nvme-reset-wq nvme_fc_ctrl_ioerr_work [nvme_fc]\nCall Trace:\n <TASK>\n dump_stack_lvl+0x57/0x80\n register_lock_class+0x567/0x580\n __lock_acquire+0x330/0xb90\n lock_acquire.part.0+0xad/0x210\n blk_mq_tagset_busy_iter+0xf9/0xc00\n __nvme_fc_abort_outstanding_ios+0x23f/0x320 [nvme_fc]\n nvme_fc_ctrl_ioerr_work+0x172/0x210 [nvme_fc]\n process_one_work+0x82c/0x1450\n worker_thread+0x5ee/0xfd0\n kthread+0x3a0/0x750\n ret_from_fork+0x439/0x670\n ret_from_fork_asm+0x1a/0x30\n </TASK>\n\nUpdate the check in __nvme_fc_abort_outstanding_ios() confirm that io\ntagset was created before iterating over busy requests. Also make sure\nto cancel ctrl->ioerr_work before removing io tagset."}], "id": "CVE-2026-97409", "lastModified": "2026-10-30T13:21:03.810", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-24T17:17:18.463", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0b7c8009b3037722103032c336732d63e0507a51"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5488e2706c58444a24e15773237dcc0bedcd771f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/da930308b4bc24c335574e85ca84ff70a988cf05"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dd39064d2948b14dbe4f364fe4b3c9cfc632cc21"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ee38469f88492df99e1d97f03aa40ecfd218934f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: nvme-fc: Do not cancel requests in io target before it is initialized", "id": "2540444", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2540444"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-908", "details": ["A flaw was found in the Linux kernel's NVMe over Fibre Channel (NVMe-FC) driver. When establishing a connection to an NVMe-FC target, an administrative request timeout triggers error-handling routines that attempt to abort requests on uninitialized I/O queues. A malicious or unresponsive target could trigger this behavior during connection setup, leading to a kernel crash and a Denial of Service (DoS)."], "name": "CVE-2026-97409", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-97409\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97409\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97409.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,da930308b4bc24c335574e85ca84ff70a988cf05)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,dd39064d2948b14dbe4f364fe4b3c9cfc632cc21)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,ee38469f88492df99e1d97f03aa40ecfd218934f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.111)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.53)"}}], "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": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.111,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-09-25T00:30:18.225474+00:00", "updated": "2026-10-01T16:00:11.503752+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-664", "CWE-908"]}