{ "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": "2026-10-24T14:09:40.850Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-24T14:09:40.850Z" }, "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": "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": "c440cd080761b18a52cac20f2a42e5da1e3995af", "status": "affected", "versionType": "git" }, { "version": "8a452d62e7cea3c8a2676a3b89a9118755a1a271", "status": "affected", "versionType": "git" }, { "version": "5.10.43", "lessThan": "5.11", "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": "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": "5.13", "versionEndExcluding": "6.6.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.12.113" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.18.57" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.2.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.43" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12.10" } ] } ] } ], "references": [ { "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" } } } }