CVE-2026-97433

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97433", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T14:53:16.869Z", "datePublished": "2026-09-24T16:03:46.169Z", "dateUpdated": "2026-09-25T12:44:10.016Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-25T12:44:10.016Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: validate FDP configuration descriptor sizes\n\nValidate descriptor sizes while walking the FDP configurations log so\ndsze == 0 or a descriptor past the log end cannot cause unbounded\niteration or reads past the buffer."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "baseScore": 8.2, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - nvme_query_fdp_granularity() walks nvme_fdp_config_desc.dsze from the Get Log Page LID 0x20 (NVME_LOG_FDP_CONFIGS) buffer filled by nvme_get_log_lsi(); on nvme-tcp that payload is C2HData copied by nvme_tcp_recv_data() from the remote NVMe-oF target (TCP 4420), so the malformed descriptor sizes arrive on the wire.\nAC:L - The peer sets Identify ctratt NVME_CTRL_ATTR_FDPS, Get Features FID 0x1d (FDPE and fdpcidx), and log fields sze/dsze, so nvme_query_fdp_granularity() can skip with a crafted dsze to park desc just below end and then load nrg/runs past the kvmalloc object with no race.\nPR:N - The attacker is the NVMe-oF controller. nvme_scan_work() submits that Get Log Page on the existing admin_q; DH-HMAC-CHAP and TLS are optional, and no host uid, capability, or /dev/nvme-fabrics write is required once the session exists.\nUI:N - nvme_start_ctrl() queues ctrl->scan_work and nvme_handle_aen_notice() requeues it on NVME_AER_NOTICE_NS_CHANGED, so nvme_scan_ns()->nvme_update_ns_info_block()->nvme_query_fdp_info()->nvme_query_fdp_granularity() runs on nvme_wq without a further victim mount or click.\nS:U - The over-read is of the host kvmalloc FDP configs log and the info->runs store inside nvme_query_fdp_granularity(); it does not cross a KVM/Xen, IOMMU, or other distinct security authority.\nC:L - After the dsze walk, nvme_query_fdp_granularity() only does le32_to_cpu(desc->nrg) and le64_to_cpu(desc->runs) (offsets 4 and 16). With desc at end-1 that is a strictly bounded 12-byte load past the log object, a small heap leak rather than an arbitrary read.\nI:N - Those fields are stored to info->runs and min()'d into write_stream_granularity in nvme_update_ns_info_block(); the dsze walk performs no out-of-bounds write, use-after-free, or control-flow hijack.\nA:H - hdr.sze is attacker-chosen (capped at PAGE_SIZE*MAX_ORDER_NR_PAGES) for kvmalloc(), and desc->nrg/desc->runs are then loaded without ensuring the selected descriptor fits; that over-read past the allocation can oops when the walk parks desc at the buffer end."}]}], "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": "30b5f20bb2ddab013035399e5c7e6577da49320a", "lessThan": "97efd7a41aac08b43ea2337c5913a2bc75484f9f", "status": "affected", "versionType": "git"}, {"version": "30b5f20bb2ddab013035399e5c7e6577da49320a", "lessThan": "0ef4daa6534a510d61ea67c8ad9bb5097b0dd5f8", "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": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "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": "6.16", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/97efd7a41aac08b43ea2337c5913a2bc75484f9f"}, {"url": "https://git.kernel.org/stable/c/0ef4daa6534a510d61ea67c8ad9bb5097b0dd5f8"}], "title": "nvme: validate FDP configuration descriptor sizes", "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": "97efd7a41aac08b43ea2337c5913a2bc75484f9f", "status": "affected", "version": "30b5f20bb2ddab013035399e5c7e6577da49320a", "versionType": "git"}, {"lessThan": "0ef4daa6534a510d61ea67c8ad9bb5097b0dd5f8", "status": "affected", "version": "30b5f20bb2ddab013035399e5c7e6577da49320a", "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": "6.16"}, {"lessThan": "6.16", "status": "unaffected", "version": "0", "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: validate FDP configuration descriptor sizes\n\nValidate descriptor sizes while walking the FDP configurations log so\ndsze == 0 or a descriptor past the log end cannot cause unbounded\niteration or reads past the buffer."}], "id": "CVE-2026-97433", "lastModified": "2026-09-25T13:17:26.930", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-24T17:17:21.350", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0ef4daa6534a510d61ea67c8ad9bb5097b0dd5f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/97efd7a41aac08b43ea2337c5913a2bc75484f9f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: nvme: validate FDP configuration descriptor sizes", "id": "2540457", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2540457"}, "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-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnvme: validate FDP configuration descriptor sizes\nValidate descriptor sizes while walking the FDP configurations log so\ndsze == 0 or a descriptor past the log end cannot cause unbounded\niteration or reads past the buffer.", "A flaw was found in the Linux kernel's Non-Volatile Memory Express (NVMe) driver. When processing Flexible Data Placement (FDP) configuration log descriptors, the driver fails to properly validate descriptor sizes before iterating through them. A malicious NVMe device returning crafted log data can exploit this issue to cause unbounded loops or out-of-bounds memory reads, leading to a Denial of Service (DoS) or potential information disclosure."], "name": "CVE-2026-97433", "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": "Fix deferred", "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"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "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-2026-97433\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97433\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97433.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,97efd7a41aac08b43ea2337c5913a2bc75484f9f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,0ef4daa6534a510d61ea67c8ad9bb5097b0dd5f8)"}}, {"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": "[6.18.53,6.19.0)"}}, {"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": "2026-09-25T02:00:17.726486+00:00", "updated": "2026-10-01T15:45:08.509441+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}