CVE-2026-74383

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74383", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.890Z", "datePublished": "2026-08-15T05:58:59.767Z", "dateUpdated": "2026-08-17T05:46:33.114Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:46:33.114Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-pci: fix out-of-bounds access in nvme_setup_descriptor_pools\n\nnvme_setup_descriptor_pools() indexes dev->descriptor_pools[] using the\nnuma_node forwarded from hctx->numa_node by its single caller,\nnvme_init_hctx_common(). On a non-NUMA kernel hctx->numa_node is\nNUMA_NO_NODE (-1). Because the parameter was declared 'unsigned', the\nvalue becomes UINT_MAX and the index walks off the array (sized to\nnr_node_ids), faulting during nvme_alloc_ns() and leaving the namespace\nwithout a /dev node.\n\nReproduces on any NVMe controller probed by a CONFIG_NUMA=n kernel:\n\n BUG: unable to handle page fault for address: ffff889101603d38\n RIP: 0010:nvme_init_hctx_common+0x5a/0x190 [nvme]\n Call Trace:\n nvme_init_hctx+0x10/0x20 [nvme]\n nvme_alloc_ns+0x9e/0xa10 [nvme_core]\n nvme_scan_ns+0x301/0x3b0 [nvme_core]\n nvme_scan_ns_async+0x23/0x30 [nvme_core]\n\nSwitch the parameter to int and fall back to node 0 when it is\nNUMA_NO_NODE; node 0 is always present."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The flaw is in the nvme-pci host driver and is reached during local PCIe NVMe controller probe and namespace scan (nvme_probe/nvme_scan_work\u2192nvme_alloc_ns\u2192blk_mq_alloc_disk\u2192nvme_init_hctx_common), including rescan via NVME_IOCTL_RESCAN/sysfs and AER NS_CHANGED events from a locally attached device; there is no network-facing entry point.\nAC:L - On CONFIG_NUMA=n kernels, hctx->numa_node is always NUMA_NO_NODE, so the unsigned wrap to UINT_MAX and subsequent out-of-bounds access occur deterministically the first time any namespace hardware context is initialized for a probed NVMe controller, without races or attacker-influenced memory layout.\nPR:N - Exploitation requires no host OS credentials: any locally attached PCIe NVMe controller (boot-present, hot-plugged, supply-chain, or kiosk/shared-workstation storage) triggers the vulnerable scan during probe or when device firmware delivers a namespace-changed async event, without CAP_SYS_ADMIN or other privileges.\nUI:N - Triggering the bug does not require any victim user action such as mounting a filesystem or opening a device node; namespace scanning runs automatically from driver probe, controller rescan, or device-generated AER notifications handled entirely in kernel workqueues.\nS:U - Impact is confined to kernel memory corruption and crash within the host kernel NVMe/PCI driver security domain; it does not cross a VM, container, or IOMMU boundary to compromise a separate security authority.\nC:H - The vulnerable code performs an out-of-bounds read of descriptor_pools[UINT_MAX] (checking pools->small) far beyond the nr_node_ids-sized allocation, constituting an unbounded kernel memory read that can disclose adjacent kernel data if the access does not immediately fault.\nI:H - The same out-of-bounds index would be used for dma_pool_create_node writes to pools->large and pools->small, giving an out-of-bounds kernel write primitive; even when the fault occurs on the initial read, this is exploitable-class memory corruption rather than a benign NULL dereference.\nA:H - The reported reproducer causes a kernel page fault in nvme_init_hctx_common during nvme_alloc_ns, producing an oops that aborts namespace creation and can panic the system, denying storage availability on CONFIG_NUMA=n hosts with NVMe controllers."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/host/pci.c"], "versions": [{"version": "d977506f8863807129d7a11f4057dfb1b38085ea", "lessThan": "3e8aed5edaeeb237f97255d711aac6b5843fc059", "status": "affected", "versionType": "git"}, {"version": "d977506f8863807129d7a11f4057dfb1b38085ea", "lessThan": "fa9b6accd1ad7af6914b409c6b003c417724c299", "status": "affected", "versionType": "git"}, {"version": "d977506f8863807129d7a11f4057dfb1b38085ea", "lessThan": "a192b8cfa447e1b3701a13434a31c392b2e7ed29", "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/pci.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "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": "6.16", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3e8aed5edaeeb237f97255d711aac6b5843fc059"}, {"url": "https://git.kernel.org/stable/c/fa9b6accd1ad7af6914b409c6b003c417724c299"}, {"url": "https://git.kernel.org/stable/c/a192b8cfa447e1b3701a13434a31c392b2e7ed29"}], "title": "nvme-pci: fix out-of-bounds access in nvme_setup_descriptor_pools", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/nvme/host/pci.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "3e8aed5edaeeb237f97255d711aac6b5843fc059", "status": "affected", "version": "d977506f8863807129d7a11f4057dfb1b38085ea", "versionType": "git"}, {"lessThan": "fa9b6accd1ad7af6914b409c6b003c417724c299", "status": "affected", "version": "d977506f8863807129d7a11f4057dfb1b38085ea", "versionType": "git"}, {"lessThan": "a192b8cfa447e1b3701a13434a31c392b2e7ed29", "status": "affected", "version": "d977506f8863807129d7a11f4057dfb1b38085ea", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/nvme/host/pci.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"lessThan": "6.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "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-pci: fix out-of-bounds access in nvme_setup_descriptor_pools\n\nnvme_setup_descriptor_pools() indexes dev->descriptor_pools[] using the\nnuma_node forwarded from hctx->numa_node by its single caller,\nnvme_init_hctx_common(). On a non-NUMA kernel hctx->numa_node is\nNUMA_NO_NODE (-1). Because the parameter was declared 'unsigned', the\nvalue becomes UINT_MAX and the index walks off the array (sized to\nnr_node_ids), faulting during nvme_alloc_ns() and leaving the namespace\nwithout a /dev node.\n\nReproduces on any NVMe controller probed by a CONFIG_NUMA=n kernel:\n\n BUG: unable to handle page fault for address: ffff889101603d38\n RIP: 0010:nvme_init_hctx_common+0x5a/0x190 [nvme]\n Call Trace:\n nvme_init_hctx+0x10/0x20 [nvme]\n nvme_alloc_ns+0x9e/0xa10 [nvme_core]\n nvme_scan_ns+0x301/0x3b0 [nvme_core]\n nvme_scan_ns_async+0x23/0x30 [nvme_core]\n\nSwitch the parameter to int and fall back to node 0 when it is\nNUMA_NO_NODE; node 0 is always present."}], "id": "CVE-2026-74383", "lastModified": "2026-08-17T06:19:33.183", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:22:40.170", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3e8aed5edaeeb237f97255d711aac6b5843fc059"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a192b8cfa447e1b3701a13434a31c392b2e7ed29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fa9b6accd1ad7af6914b409c6b003c417724c299"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: nvme-pci: fix out-of-bounds access in nvme_setup_descriptor_pools", "id": "2516890", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516890"}, "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-787", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnvme-pci: fix out-of-bounds access in nvme_setup_descriptor_pools\nnvme_setup_descriptor_pools() indexes dev->descriptor_pools[] using the\nnuma_node forwarded from hctx->numa_node by its single caller,\nnvme_init_hctx_common(). On a non-NUMA kernel hctx->numa_node is\nNUMA_NO_NODE (-1). Because the parameter was declared 'unsigned', the\nvalue becomes UINT_MAX and the index walks off the array (sized to\nnr_node_ids), faulting during nvme_alloc_ns() and leaving the namespace\nwithout a /dev node.\nReproduces on any NVMe controller probed by a CONFIG_NUMA=n kernel:\nBUG: unable to handle page fault for address: ffff889101603d38\nRIP: 0010:nvme_init_hctx_common+0x5a/0x190 [nvme]\nCall Trace:\nnvme_init_hctx+0x10/0x20 [nvme]\nnvme_alloc_ns+0x9e/0xa10 [nvme_core]\nnvme_scan_ns+0x301/0x3b0 [nvme_core]\nnvme_scan_ns_async+0x23/0x30 [nvme_core]\nSwitch the parameter to int and fall back to node 0 when it is\nNUMA_NO_NODE; node 0 is always present.", "A flaw was found in the NVMe-PCI subsystem of the Linux kernel. An out-of-bounds access can occur in the `nvme_setup_descriptor_pools()` function when handling Non-Uniform Memory Access (NUMA) node values on systems configured without NUMA support. This incorrect indexing can lead to a page fault, preventing the NVMe namespace from being properly initialized and resulting in a denial of service for the affected NVMe controller."], "name": "CVE-2026-74383", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74383\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74383\nhttps://lore.kernel.org/linux-cve-announce/2026081505-CVE-2026-74383-a1aa@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d977506f8863807129d7a11f4057dfb1b38085ea,3e8aed5edaeeb237f97255d711aac6b5843fc059)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d977506f8863807129d7a11f4057dfb1b38085ea,fa9b6accd1ad7af6914b409c6b003c417724c299)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d977506f8863807129d7a11f4057dfb1b38085ea,a192b8cfa447e1b3701a13434a31c392b2e7ed29)"}}], "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": "semver", "value": "6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-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": "2026-08-15T13:30:04.657840+00:00", "updated": "2026-08-22T01:30:17.265899+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-787"]}