286 lines
15 KiB
JSON
286 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-98964",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:25:14.383Z",
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"datePublished": "2026-10-23T12:19:32.374Z",
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"dateUpdated": "2026-10-30T12:40:32.519Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-30T12:40:32.519Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/nvme/target/core.c"
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],
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"versions": [
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{
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"version": "c440cd080761b18a52cac20f2a42e5da1e3995af",
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"lessThan": "eb72e2eeff559eb1eb07b1d644ce2bc1a16c4a80",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3",
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"lessThan": "48c8b59429d09a7c3598de425acbc2d3f4e6647b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3",
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"lessThan": "e8f24ae4f45efe6861f801c6ebd2789c9016f1bc",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3",
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"lessThan": "3c231142c4f4bb96836469eb276026ec55940093",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3",
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"lessThan": "32f21607911a1f69c8f0f93a6c28fe6f8490aa98",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3",
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"lessThan": "ce79a6c5cc1b8054ec8d3eba16adda4a36113438",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3",
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"lessThan": "73bf0f9579633b531098a475e6e55c9316763aed",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3",
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"lessThan": "4aa9c0f377a4de5e8fddce76b34ee4529639a1ff",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8a452d62e7cea3c8a2676a3b89a9118755a1a271",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5.10.43",
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"lessThan": "5.10.273",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.12.10",
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"lessThan": "5.13",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/nvme/target/core.c"
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],
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"versions": [
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{
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"version": "5.13",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.13",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.273",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.224",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.113",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.57",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.11",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.10.43",
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"versionEndExcluding": "5.10.273"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/eb72e2eeff559eb1eb07b1d644ce2bc1a16c4a80"
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},
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{
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"url": "https://git.kernel.org/stable/c/48c8b59429d09a7c3598de425acbc2d3f4e6647b"
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},
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{
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"url": "https://git.kernel.org/stable/c/e8f24ae4f45efe6861f801c6ebd2789c9016f1bc"
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},
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{
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"url": "https://git.kernel.org/stable/c/3c231142c4f4bb96836469eb276026ec55940093"
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},
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{
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"url": "https://git.kernel.org/stable/c/32f21607911a1f69c8f0f93a6c28fe6f8490aa98"
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},
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{
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"url": "https://git.kernel.org/stable/c/ce79a6c5cc1b8054ec8d3eba16adda4a36113438"
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},
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{
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"url": "https://git.kernel.org/stable/c/73bf0f9579633b531098a475e6e55c9316763aed"
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},
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{
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"url": "https://git.kernel.org/stable/c/4aa9c0f377a4de5e8fddce76b34ee4529639a1ff"
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}
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],
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"title": "nvmet: use the local P2P device on metadata allocation failure",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |