260 lines
14 KiB
JSON
260 lines
14 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-2026-72329",
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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": "2026-08-09T03:40:39.919Z",
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"datePublished": "2026-08-15T05:55:39.931Z",
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"dateUpdated": "2026-10-30T12:29:05.019Z"
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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": "2026-10-30T12:29:05.019Z"
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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\nnet/liquidio: drop cached VF pci_dev LUT\n\nThe PF SR-IOV enable path caches VF pci_dev pointers in\ndpiring_to_vfpcidev_lut[] by iterating with pci_get_device(). Those\nentries do not own a reference, because the iterator drops the previous\ndevice reference on each step. The cached pointer is then dereferenced\nlater when handling OCTEON_VF_FLR_REQUEST.\n\nReplace the cached VF mapping with runtime lookup on the mailbox DPI\nring: derive the VF index from q_no, resolve the VF via exported PCI\nIOV helpers, validate it with the PF pointer and VF ID, then issue\npcie_flr() and drop the reference with pci_dev_put(). Remove the\nunused VF lookup table initialization and cleanup."
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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:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
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"baseScore": 9.3,
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"baseSeverity": "CRITICAL"
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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:L - The bug is in the Cavium LiquidIO CN23XX PF driver handling OCTEON_VF_FLR_REQUEST over the PCIe SR-IOV hardware mailbox, not via network packets; exploitation requires code running against an assigned VF (e.g., a cloud VM with SR-IOV passthrough).\nAC:L - VF pci_dev pointers in dpiring_to_vfpcidev_lut[] are stale immediately after SR-IOV enable because pci_get_device() drops references during iteration; an attacker controlling VF driver teardown can reliably send OCTEON_VF_FLR_REQUEST and repeat FLR attempts to influence heap reuse.\nPR:N - In the highest-impact deployment (multi-tenant cloud with VF passthrough), a tenant needs no host administrator privileges—only control of the assigned VF from within their VM—to trigger PF mailbox processing and pcie_flr() on the dangling pci_dev.\nUI:N - No victim interaction is required; triggering VF driver removal or module unload during octeon_destroy_resources() automatically sends the FLR mailbox request to the PF without any user action on the host.\nS:C - The vulnerable PF driver executes in the host kernel but is triggered from an isolated VF guest/tenant via the SR-IOV mailbox, crossing the VM/tenant security boundary into host kernel context.\nC:H - This is a use-after-free of struct pci_dev; pcie_flr() and pci_dev_reset_iommu_prepare() dereference freed pci_dev fields, enabling arbitrary kernel memory disclosure if the attacker reclaims the object via heap spraying.\nI:H - UAF of pci_dev causes pcie_flr() to issue PCI Express FLR config writes and IOMMU blocking on attacker-influenced memory, providing memory corruption primitives that can be leveraged for arbitrary kernel write or code execution.\nA:H - Dereferencing a stale pci_dev in pcie_flr() can oops or panic the host kernel, and issuing FLR/IOMMU operations against the wrong PCI function can disrupt host networking and device availability."
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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/net/ethernet/cavium/liquidio/lio_main.c",
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"drivers/net/ethernet/cavium/liquidio/octeon_device.h",
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"drivers/net/ethernet/cavium/liquidio/octeon_mailbox.c"
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],
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"versions": [
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{
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"version": "ca6139ffc67ee6ef0459f81e37894ed411083855",
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"lessThan": "4ec87796fadf5a631ee6513c258c0e3d9ca62f79",
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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": "ca6139ffc67ee6ef0459f81e37894ed411083855",
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"lessThan": "e3b20de8d7c06c8f1a0ded1e52be9d282609c3da",
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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": "ca6139ffc67ee6ef0459f81e37894ed411083855",
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"lessThan": "1cf5c6a80adc31456f3e93b2922a2446fd63e2c4",
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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": "ca6139ffc67ee6ef0459f81e37894ed411083855",
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"lessThan": "08ff33dce6f91510bb296a753a232db0ca3fd3d8",
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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": "ca6139ffc67ee6ef0459f81e37894ed411083855",
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"lessThan": "81acef3a247fd523513a2e9f71de1c167bc0f882",
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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": "ca6139ffc67ee6ef0459f81e37894ed411083855",
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"lessThan": "5c0e3ba4f500fd4314ceb42f07f16bc445156431",
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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/net/ethernet/cavium/liquidio/lio_main.c",
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"drivers/net/ethernet/cavium/liquidio/octeon_device.h",
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"drivers/net/ethernet/cavium/liquidio/octeon_mailbox.c"
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],
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"versions": [
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{
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"version": "4.10",
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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": "4.10",
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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": "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": "6.12.114",
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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": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "4.10",
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"versionEndExcluding": "6.1.191"
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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": "4.10",
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"versionEndExcluding": "6.6.160"
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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": "4.10",
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"versionEndExcluding": "6.12.114"
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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": "4.10",
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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": "4.10",
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"versionEndExcluding": "7.1.5"
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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": "4.10",
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"versionEndExcluding": "7.2"
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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/4ec87796fadf5a631ee6513c258c0e3d9ca62f79"
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},
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{
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"url": "https://git.kernel.org/stable/c/e3b20de8d7c06c8f1a0ded1e52be9d282609c3da"
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},
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{
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"url": "https://git.kernel.org/stable/c/1cf5c6a80adc31456f3e93b2922a2446fd63e2c4"
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},
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{
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"url": "https://git.kernel.org/stable/c/08ff33dce6f91510bb296a753a232db0ca3fd3d8"
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},
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{
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"url": "https://git.kernel.org/stable/c/81acef3a247fd523513a2e9f71de1c167bc0f882"
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},
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{
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"url": "https://git.kernel.org/stable/c/5c0e3ba4f500fd4314ceb42f07f16bc445156431"
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}
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],
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"title": "net/liquidio: drop cached VF pci_dev LUT",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-72329",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T18:47:03.690749Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-16T18:55:18.086Z"
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}
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}
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]
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}
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} |