{"api_version":"1","generated_at":"2026-09-04T02:39:37+00:00","cve":"CVE-2026-72329","urls":{"html":"https://cve.report/CVE-2026-72329","api":"https://cve.report/api/cve/CVE-2026-72329.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72329","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72329"},"summary":{"title":"net/liquidio: drop cached VF pci_dev LUT","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:05","updated_at":"2026-08-17 06:18:36"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"9.3","severity":"CRITICAL","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":9.3,"baseSeverity":"CRITICAL","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"9.3","severity":"CRITICAL","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","data":{"baseScore":9.3,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/5c0e3ba4f500fd4314ceb42f07f16bc445156431","name":"https://git.kernel.org/stable/c/5c0e3ba4f500fd4314ceb42f07f16bc445156431","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/81acef3a247fd523513a2e9f71de1c167bc0f882","name":"https://git.kernel.org/stable/c/81acef3a247fd523513a2e9f71de1c167bc0f882","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72329","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72329","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca6139ffc67ee6ef0459f81e37894ed411083855 81acef3a247fd523513a2e9f71de1c167bc0f882 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca6139ffc67ee6ef0459f81e37894ed411083855 5c0e3ba4f500fd4314ceb42f07f16bc445156431 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.10","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72329","cve":"CVE-2026-72329","epss":"0.001800000","percentile":"0.078160000","score_date":"2026-08-17","updated_at":"2026-08-18 00:11:47"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/cavium/liquidio/lio_main.c","drivers/net/ethernet/cavium/liquidio/octeon_device.h","drivers/net/ethernet/cavium/liquidio/octeon_mailbox.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"81acef3a247fd523513a2e9f71de1c167bc0f882","status":"affected","version":"ca6139ffc67ee6ef0459f81e37894ed411083855","versionType":"git"},{"lessThan":"5c0e3ba4f500fd4314ceb42f07f16bc445156431","status":"affected","version":"ca6139ffc67ee6ef0459f81e37894ed411083855","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/cavium/liquidio/lio_main.c","drivers/net/ethernet/cavium/liquidio/octeon_device.h","drivers/net/ethernet/cavium/liquidio/octeon_mailbox.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.10"},{"lessThan":"4.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"4.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"4.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","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."}],"metrics":[{"cvssV3_1":{"baseScore":9.3,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","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."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:42:51.194Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/81acef3a247fd523513a2e9f71de1c167bc0f882"},{"url":"https://git.kernel.org/stable/c/5c0e3ba4f500fd4314ceb42f07f16bc445156431"}],"title":"net/liquidio: drop cached VF pci_dev LUT","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72329","datePublished":"2026-08-15T05:55:39.931Z","dateReserved":"2026-08-09T03:40:39.919Z","dateUpdated":"2026-08-17T05:42:51.194Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:05","lastModifiedDate":"2026-08-17 06:18:36","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":9.3,"baseSeverity":"CRITICAL","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.5,"impactScore":6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72329","Ordinal":"1","Title":"net/liquidio: drop cached VF pci_dev LUT","CVE":"CVE-2026-72329","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72329","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"net/liquidio: drop cached VF pci_dev LUT"}]}}}