CVE-2026-89972

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89972", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.778Z", "datePublished": "2026-09-16T10:32:51.701Z", "dateUpdated": "2026-10-30T12:33:38.726Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:33:38.726Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: add missing SRCU grace period in error path\n\nnvme_alloc_ns() error path at out_unlink_ns removes ns from the\nnamespace head siblings list with list_del_rcu(&ns->siblings) but\ndoes not wait for SRCU readers before freeing the namespace struct.\nMultipath code iterates the head->list under srcu_read_lock() in\nnvme_find_path() and nvme_mpath_revalidate_paths(), so a concurrent\nreader can still hold a reference to ns when kfree(ns) runs.\n\nThe normal removal path in nvme_ns_remove() correctly calls\nsynchronize_srcu(&ns->head->srcu) after list_del_rcu() to wait for\nin-progress readers. Add the same grace period in the error path."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - NVMe host core scans namespaces from NVMe-oF (nvme-tcp/rdma/fc) when a remote target sends NS_CHANGED AENs or Identify data; a malicious or compromised fabric target drives nvme_scan_ns\u2192nvme_alloc_ns and the out_unlink_ns UAF over the network (typically TCP 4420).\nAC:L - The remote target controls both sides of the race: it can stall then fail Identify after list_add_tail_rcu so the new path is on head->list, while concurrent multipath I/O or ANA AENs walk that list under srcu_read_lock in nvme_find_path/nvme_mpath_revalidate_paths; CONFIG_NVME_MULTIPATH is the recommended default.\nPR:N - The attacker is the NVMe-oF peer and needs no host account or capability; NVMe/TCP is unauthenticated by default (TLS and DH-HMAC-CHAP are optional), and AENs plus Identify responses are accepted on an already-established fabrics session.\nUI:N - NVMe-oF controllers are persistent boot/autoconnect configuration; namespace rescans, ANA updates, and multipath I/O run from kernel workqueues and the block layer with no further victim action at exploit time.\nS:U - The use-after-free corrupts kernel heap (struct nvme_ns) inside the host NVMe driver and does not cross a VM, IOMMU, or other distinct security authority.\nC:H - Use-after-free of the namespace object on the multipath siblings list lets an attacker reclaim the kmalloc slab and obtain a kernel read primitive from stale ns->disk/ctrl/flags dereferences in nvme_find_path.\nI:H - The same UAF is heap-sprayable: multipath I/O and ioctl paths dereference fields of the freed nvme_ns, enabling arbitrary write and control-flow hijacking in kernel context.\nA:H - Any use-after-free of ns during the SRCU list walk can oops or panic the host kernel even without a full exploit, taking down the NVMe storage stack."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/host/core.c"], "versions": [{"version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "lessThan": "037e71058e8a59568db72015d4386f54e54dff77", "status": "affected", "versionType": "git"}, {"version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "lessThan": "7f180cef9f3421ece85c43bfdc326ce5875845bb", "status": "affected", "versionType": "git"}, {"version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "lessThan": "da710ec2a70a85de73afd4f7869b234fd9ede49e", "status": "affected", "versionType": "git"}, {"version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "lessThan": "3868476cd39161f18720582df17a1b621e805b5d", "status": "affected", "versionType": "git"}, {"version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "lessThan": "0d4735418512ef825176726eaaa8bd6a35f6b46d", "status": "affected", "versionType": "git"}, {"version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "lessThan": "d663944dbad81bb0e3635d7090db4713e6300858", "status": "affected", "versionType": "git"}, {"version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "lessThan": "76023560d60f10b4f808941163aa2975f1631683", "status": "affected", "versionType": "git"}, {"version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "lessThan": "ef248d5de4469fb6bbaf8dbe0c4c47800080d648", "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/core.c"], "versions": [{"version": "4.15", "status": "affected"}, {"version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "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": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "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": "4.15", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/037e71058e8a59568db72015d4386f54e54dff77"}, {"url": "https://git.kernel.org/stable/c/7f180cef9f3421ece85c43bfdc326ce5875845bb"}, {"url": "https://git.kernel.org/stable/c/da710ec2a70a85de73afd4f7869b234fd9ede49e"}, {"url": "https://git.kernel.org/stable/c/3868476cd39161f18720582df17a1b621e805b5d"}, {"url": "https://git.kernel.org/stable/c/0d4735418512ef825176726eaaa8bd6a35f6b46d"}, {"url": "https://git.kernel.org/stable/c/d663944dbad81bb0e3635d7090db4713e6300858"}, {"url": "https://git.kernel.org/stable/c/76023560d60f10b4f808941163aa2975f1631683"}, {"url": "https://git.kernel.org/stable/c/ef248d5de4469fb6bbaf8dbe0c4c47800080d648"}], "title": "nvme: add missing SRCU grace period in error path", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/nvme/host/core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "037e71058e8a59568db72015d4386f54e54dff77", "status": "affected", "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "versionType": "git"}, {"lessThan": "7f180cef9f3421ece85c43bfdc326ce5875845bb", "status": "affected", "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "versionType": "git"}, {"lessThan": "da710ec2a70a85de73afd4f7869b234fd9ede49e", "status": "affected", "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "versionType": "git"}, {"lessThan": "3868476cd39161f18720582df17a1b621e805b5d", "status": "affected", "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "versionType": "git"}, {"lessThan": "0d4735418512ef825176726eaaa8bd6a35f6b46d", "status": "affected", "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "versionType": "git"}, {"lessThan": "d663944dbad81bb0e3635d7090db4713e6300858", "status": "affected", "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "versionType": "git"}, {"lessThan": "76023560d60f10b4f808941163aa2975f1631683", "status": "affected", "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "versionType": "git"}, {"lessThan": "ef248d5de4469fb6bbaf8dbe0c4c47800080d648", "status": "affected", "version": "ed754e5deeb17f4e675c84e4b6c640cc7344e498", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/nvme/host/core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.15"}, {"lessThan": "4.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "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": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "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\nnvme: add missing SRCU grace period in error path\n\nnvme_alloc_ns() error path at out_unlink_ns removes ns from the\nnamespace head siblings list with list_del_rcu(&ns->siblings) but\ndoes not wait for SRCU readers before freeing the namespace struct.\nMultipath code iterates the head->list under srcu_read_lock() in\nnvme_find_path() and nvme_mpath_revalidate_paths(), so a concurrent\nreader can still hold a reference to ns when kfree(ns) runs.\n\nThe normal removal path in nvme_ns_remove() correctly calls\nsynchronize_srcu(&ns->head->srcu) after list_del_rcu() to wait for\nin-progress readers. Add the same grace period in the error path."}], "id": "CVE-2026-89972", "lastModified": "2026-10-30T13:20:37.400", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-16T11:17:07.953", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/037e71058e8a59568db72015d4386f54e54dff77"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0d4735418512ef825176726eaaa8bd6a35f6b46d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3868476cd39161f18720582df17a1b621e805b5d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/76023560d60f10b4f808941163aa2975f1631683"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7f180cef9f3421ece85c43bfdc326ce5875845bb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d663944dbad81bb0e3635d7090db4713e6300858"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/da710ec2a70a85de73afd4f7869b234fd9ede49e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ef248d5de4469fb6bbaf8dbe0c4c47800080d648"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ed754e5deeb17f4e675c84e4b6c640cc7344e498,d663944dbad81bb0e3635d7090db4713e6300858)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ed754e5deeb17f4e675c84e4b6c640cc7344e498,76023560d60f10b4f808941163aa2975f1631683)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ed754e5deeb17f4e675c84e4b6c640cc7344e498,ef248d5de4469fb6bbaf8dbe0c4c47800080d648)"}}], "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": "4.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc2,*)"}}], "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": "2026-09-16T23:00:09.341447+00:00", "updated": "2026-09-18T08:15:06.136973+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416", "CWE-362"]}