159 lines
8.0 KiB
JSON
159 lines
8.0 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-2026-64020",
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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": "2026-07-19T07:54:57.027Z",
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"datePublished": "2026-07-19T15:39:14.115Z",
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"dateUpdated": "2026-10-15T10:07:57.141Z"
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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": "2026-10-15T10:07:57.141Z"
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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\nnvme-pci: fix dma_vecs leak on p2p memory\n\nWe don't unmap P2P memory, so we don't need to track it. The dma_vec\nallocation was getting leaked on the completion."
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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 - On NVMe-oF storage servers with p2pmem-enabled namespaces backed by local PCIe NVMe, a remote client can trigger this via nvmet-tcp read/write commands that flow through submit_bio() into nvme-pci P2P PRP setup and completion.\nAC:L - Once the P2P-capable NVMe/IOMMU configuration is present, a single crafted read or write reliably leaks the dma_vecs allocation; no races or special memory layout are required.\nPR:N - Remote exploitation via nvmet-tcp requires no local privileges on the target when in-band authentication is not configured, matching pre-authentication network service guidance for fabric targets.\nUI:N - Exploitation is achieved entirely through NVMe I/O commands and requires no victim interaction beyond the attacker (or their client) initiating storage operations.\nS:U - The vulnerability causes kernel memory leakage and NVMe I/O denial within the same kernel security boundary; it does not cross VM, container, or IOMMU isolation boundaries.\nC:N - This is a kmalloc/mempool leak with no out-of-bounds read, use-after-free, or information disclosure; freed dma_vecs tracking memory is not exposed to the attacker.\nI:N - No memory corruption, arbitrary write, or code execution primitive is created; impact is limited to resource exhaustion and I/O failure.\nA:H - Each triggering completion permanently exhausts the single-element dmavec mempool, causing persistent BLK_STS_RESOURCE failures that deny subsequent P2P and non-IOVA PRP I/O on the affected NVMe controller until reboot."
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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/host/pci.c"
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],
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"versions": [
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{
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"version": "b8b7570a7ec872f2a27b775c4f8710ca8a357adf",
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"lessThan": "b9390aa62fdcabdaac2d09545be05901f6cecaf5",
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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": "b8b7570a7ec872f2a27b775c4f8710ca8a357adf",
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"lessThan": "24ea0de233d9ebb5ebd6f6018eaf2084af25e3dd",
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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": "b8b7570a7ec872f2a27b775c4f8710ca8a357adf",
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"lessThan": "85686c72966c5ee637893f124ddb31a1cace7bee",
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"status": "affected",
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"versionType": "git"
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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/host/pci.c"
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],
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"versions": [
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{
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"version": "6.17",
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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": "6.17",
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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": "7.0.11",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.17",
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"versionEndExcluding": "6.18.57"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.17",
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"versionEndExcluding": "7.0.11"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.17",
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"versionEndExcluding": "7.1"
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}
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]
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}
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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/b9390aa62fdcabdaac2d09545be05901f6cecaf5"
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},
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{
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"url": "https://git.kernel.org/stable/c/24ea0de233d9ebb5ebd6f6018eaf2084af25e3dd"
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},
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{
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"url": "https://git.kernel.org/stable/c/85686c72966c5ee637893f124ddb31a1cace7bee"
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}
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],
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"title": "nvme-pci: fix dma_vecs leak on p2p memory",
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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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} |