CVE-2026-98964

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98964", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.383Z", "datePublished": "2026-10-23T12:19:32.374Z", "dateUpdated": "2026-10-30T12:40:32.519Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:40:32.519Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: use the local P2P device on metadata allocation failure\n\nnvmet_req_alloc_p2pmem_sgls() assigns req->p2p_dev only after the data\nand metadata SGL allocations succeed. If the data allocation succeeds\nbut the metadata allocation fails, out_free_sg passes req->p2p_dev to\npci_p2pmem_free_sgl() before that assignment has taken place.\n\nPass the local p2p_dev argument instead, so cleanup uses the same PCI\ndevice as the successful data allocation."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - An NVMe/RDMA I/O capsule received by nvmet_rdma_recv_done() supplies the keyed-SGL length and RW NLB; nvmet_rdma_handle_command() -> nvmet_req_init() -> nvmet_bdev_parse_io_cmd() -> nvmet_rdma_map_sgl_keyed() -> nvmet_req_alloc_sgls() reaches patched nvmet_req_alloc_p2pmem_sgls(). The RDMA_PS_TCP listener binds IPv4/IPv6, so it is network-reachable.\nAC:L - On a P2P/PI-enabled target, nvmet_bdev_parse_io_cmd() derives metadata_len from cmd->rw.length, while nvmet_rdma_map_sgl_keyed() copies the capsule's SGL length into transfer_len. The peer can use chosen lengths and concurrent requests to consume the finite P2P pool until data allocation succeeds and metadata allocation fails, without an uncontrolled race.\nPR:N - nvmet_alloc_ctrl() accepts a peer through nvmet_host_allowed() when allow_any_host is set; nvmet_setup_auth() then skips DH-HMAC-CHAP, and nvmet_check_auth_status() permits I/O. The remote initiator therefore needs no credential or local privilege.\nUI:N - After the target is listening, the peer alone establishes its queues and sends metadata I/O capsules handled by nvmet_rdma_recv_done(); no victim action is needed to reach nvmet_req_alloc_p2pmem_sgls().\nS:U - nvmet_req_alloc_p2pmem_sgls() faults while freeing target-kernel memory; it does not cross a VM, IOMMU, or other security-authority boundary.\nC:N - nvmet_rdma_rsp storage is zero-initialized and normal nvmet_req_free_sgls() clears req->p2p_dev; on metadata failure, nvmet_req_alloc_p2pmem_sgls() passes that still-NULL field to pci_p2pmem_free_sgl(). The resulting NULL dereference exposes no memory.\nI:N - pci_free_p2pmem() faults while evaluating pdev->p2pdma with pdev equal to NULL, before gen_pool_free_owner() can alter the pool. This is not an out-of-bounds write, use-after-free, or other attacker-controlled modification primitive.\nA:H - nvmet_req_alloc_p2pmem_sgls() invokes pci_p2pmem_free_sgl() with a NULL device when the controlled data-success/metadata-failure split occurs; pci_free_p2pmem() then causes a kernel NULL-pointer oops or panic, taking down the target host."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/core.c"], "versions": [{"version": "c440cd080761b18a52cac20f2a42e5da1e3995af", "lessThan": "eb72e2eeff559eb1eb07b1d644ce2bc1a16c4a80", "status": "affected", "versionType": "git"}, {"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "lessThan": "48c8b59429d09a7c3598de425acbc2d3f4e6647b", "status": "affected", "versionType": "git"}, {"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "lessThan": "e8f24ae4f45efe6861f801c6ebd2789c9016f1bc", "status": "affected", "versionType": "git"}, {"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "lessThan": "3c231142c4f4bb96836469eb276026ec55940093", "status": "affected", "versionType": "git"}, {"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "lessThan": "32f21607911a1f69c8f0f93a6c28fe6f8490aa98", "status": "affected", "versionType": "git"}, {"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "lessThan": "ce79a6c5cc1b8054ec8d3eba16adda4a36113438", "status": "affected", "versionType": "git"}, {"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "lessThan": "73bf0f9579633b531098a475e6e55c9316763aed", "status": "affected", "versionType": "git"}, {"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "lessThan": "4aa9c0f377a4de5e8fddce76b34ee4529639a1ff", "status": "affected", "versionType": "git"}, {"version": "8a452d62e7cea3c8a2676a3b89a9118755a1a271", "status": "affected", "versionType": "git"}, {"version": "5.10.43", "lessThan": "5.10.273", "status": "affected", "versionType": "semver"}, {"version": "5.12.10", "lessThan": "5.13", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/core.c"], "versions": [{"version": "5.13", "status": "affected"}, {"version": "0", "lessThan": "5.13", "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": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "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": "5.10.43", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": 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{"url": "https://git.kernel.org/stable/c/3c231142c4f4bb96836469eb276026ec55940093"}, {"url": "https://git.kernel.org/stable/c/32f21607911a1f69c8f0f93a6c28fe6f8490aa98"}, {"url": "https://git.kernel.org/stable/c/ce79a6c5cc1b8054ec8d3eba16adda4a36113438"}, {"url": "https://git.kernel.org/stable/c/73bf0f9579633b531098a475e6e55c9316763aed"}, {"url": "https://git.kernel.org/stable/c/4aa9c0f377a4de5e8fddce76b34ee4529639a1ff"}], "title": "nvmet: use the local P2P device on metadata allocation failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/nvme/target/core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "eb72e2eeff559eb1eb07b1d644ce2bc1a16c4a80", "status": "affected", "version": "c440cd080761b18a52cac20f2a42e5da1e3995af", "versionType": "git"}, {"lessThan": "48c8b59429d09a7c3598de425acbc2d3f4e6647b", "status": "affected", "version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "versionType": "git"}, {"lessThan": "e8f24ae4f45efe6861f801c6ebd2789c9016f1bc", "status": "affected", "version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "versionType": "git"}, {"lessThan": "3c231142c4f4bb96836469eb276026ec55940093", "status": "affected", "version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "versionType": "git"}, {"lessThan": "32f21607911a1f69c8f0f93a6c28fe6f8490aa98", "status": "affected", "version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "versionType": "git"}, {"lessThan": "ce79a6c5cc1b8054ec8d3eba16adda4a36113438", "status": "affected", "version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "versionType": "git"}, {"lessThan": "73bf0f9579633b531098a475e6e55c9316763aed", "status": "affected", "version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "versionType": "git"}, {"lessThan": "4aa9c0f377a4de5e8fddce76b34ee4529639a1ff", "status": "affected", "version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3", "versionType": "git"}, {"status": "affected", "version": "8a452d62e7cea3c8a2676a3b89a9118755a1a271", "versionType": "git"}, {"lessThan": "5.10.273", "status": "affected", "version": "5.10.43", "versionType": "semver"}, {"lessThan": "5.13", "status": "affected", "version": "5.12.10", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/nvme/target/core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.13"}, {"lessThan": "5.13", "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": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "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: use the local P2P device on metadata allocation failure\n\nnvmet_req_alloc_p2pmem_sgls() assigns req->p2p_dev only after the data\nand metadata SGL allocations succeed. If the data allocation succeeds\nbut the metadata allocation fails, out_free_sg passes req->p2p_dev to\npci_p2pmem_free_sgl() before that assignment has taken place.\n\nPass the local p2p_dev argument instead, so cleanup uses the same PCI\ndevice as the successful data allocation."}], "id": "CVE-2026-98964", "lastModified": "2026-10-30T13:21:32.937", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-23T13:17:17.830", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/32f21607911a1f69c8f0f93a6c28fe6f8490aa98"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3c231142c4f4bb96836469eb276026ec55940093"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/48c8b59429d09a7c3598de425acbc2d3f4e6647b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4aa9c0f377a4de5e8fddce76b34ee4529639a1ff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/73bf0f9579633b531098a475e6e55c9316763aed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ce79a6c5cc1b8054ec8d3eba16adda4a36113438"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e8f24ae4f45efe6861f801c6ebd2789c9016f1bc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eb72e2eeff559eb1eb07b1d644ce2bc1a16c4a80"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: nvmet: use the local P2P device on metadata allocation failure", "id": "2559639", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559639"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnvmet: use the local P2P device on metadata allocation failure\nnvmet_req_alloc_p2pmem_sgls() assigns req->p2p_dev only after the data\nand metadata SGL allocations succeed. If the data allocation succeeds\nbut the metadata allocation fails, out_free_sg passes req->p2p_dev to\npci_p2pmem_free_sgl() before that assignment has taken place.\nPass the local p2p_dev argument instead, so cleanup uses the same PCI\ndevice as the successful data allocation.", "A flaw was found in the Linux kernel's Non-Volatile Memory Express (NVMe) target subsystem. When handling peer-to-peer (P2P) memory requests, an allocation failure during metadata processing causes the cleanup handler to reference an unassigned device structure. An attacker could exploit this flaw to cause a kernel crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-98964", "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": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98964\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98964\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98964.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bcd9a0797d73eeff659582f23277e7ab6e5f18f3,3c231142c4f4bb96836469eb276026ec55940093)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bcd9a0797d73eeff659582f23277e7ab6e5f18f3,32f21607911a1f69c8f0f93a6c28fe6f8490aa98)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bcd9a0797d73eeff659582f23277e7ab6e5f18f3,ce79a6c5cc1b8054ec8d3eba16adda4a36113438)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bcd9a0797d73eeff659582f23277e7ab6e5f18f3,73bf0f9579633b531098a475e6e55c9316763aed)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bcd9a0797d73eeff659582f23277e7ab6e5f18f3,4aa9c0f377a4de5e8fddce76b34ee4529639a1ff)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", 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