CVE-2026-98964 (GCVE-0-2026-98964)
Vulnerability from cvelistv5
Published
2026-10-23 12:19
Modified
2026-10-30 12:40
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
nvmet: use the local P2P device on metadata allocation failure
nvmet_req_alloc_p2pmem_sgls() assigns req->p2p_dev only after the data
and metadata SGL allocations succeed. If the data allocation succeeds
but the metadata allocation fails, out_free_sg passes req->p2p_dev to
pci_p2pmem_free_sgl() before that assignment has taken place.
Pass the local p2p_dev argument instead, so cleanup uses the same PCI
device as the successful data allocation.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: c440cd080761b18a52cac20f2a42e5da1e3995af Version: bcd9a0797d73eeff659582f23277e7ab6e5f18f3 Version: bcd9a0797d73eeff659582f23277e7ab6e5f18f3 Version: bcd9a0797d73eeff659582f23277e7ab6e5f18f3 Version: bcd9a0797d73eeff659582f23277e7ab6e5f18f3 Version: bcd9a0797d73eeff659582f23277e7ab6e5f18f3 Version: bcd9a0797d73eeff659582f23277e7ab6e5f18f3 Version: bcd9a0797d73eeff659582f23277e7ab6e5f18f3 Version: 8a452d62e7cea3c8a2676a3b89a9118755a1a271 Version: 5.10.43 ≤ Version: 5.12.10 ≤ |
||
{
"containers": {
"cna": {
"affected": [
{
"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": [
{
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"status": "affected",
"version": "c440cd080761b18a52cac20f2a42e5da1e3995af",
"versionType": "git"
},
{
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"status": "affected",
"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3",
"versionType": "git"
},
{
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"status": "affected",
"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3",
"versionType": "git"
},
{
"lessThan": "3c231142c4f4bb96836469eb276026ec55940093",
"status": "affected",
"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3",
"versionType": "git"
},
{
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"status": "affected",
"version": "bcd9a0797d73eeff659582f23277e7ab6e5f18f3",
"versionType": "git"
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{
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"versionType": "git"
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{
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"versionType": "git"
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},
{
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"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"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.273",
"versionStartIncluding": "5.10.43",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.224",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.191",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.160",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.113",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.57",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2.11",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.3",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.12.10",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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-\u003ep2p_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-\u003ep2p_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": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"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() -\u003e nvmet_req_init() -\u003e nvmet_bdev_parse_io_cmd() -\u003e nvmet_rdma_map_sgl_keyed() -\u003e 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-\u003erw.length, while nvmet_rdma_map_sgl_keyed() copies the capsule\u0027s 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-\u003ep2p_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-\u003ep2pdma 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."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T12:40:32.519Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/eb72e2eeff559eb1eb07b1d644ce2bc1a16c4a80"
},
{
"url": "https://git.kernel.org/stable/c/48c8b59429d09a7c3598de425acbc2d3f4e6647b"
},
{
"url": "https://git.kernel.org/stable/c/e8f24ae4f45efe6861f801c6ebd2789c9016f1bc"
},
{
"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"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-98964",
"datePublished": "2026-10-23T12:19:32.374Z",
"dateReserved": "2026-09-25T10:25:14.383Z",
"dateUpdated": "2026-10-30T12:40:32.519Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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