{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72329", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.919Z", "datePublished": "2026-08-15T05:55:39.931Z", "dateUpdated": "2026-08-17T05:42:51.194Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:42:51.194Z"}, "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": {"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"}, "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\u2014only control of the assigned VF from within their VM\u2014to 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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "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"], "versions": [{"version": "ca6139ffc67ee6ef0459f81e37894ed411083855", "lessThan": "81acef3a247fd523513a2e9f71de1c167bc0f882", "status": "affected", "versionType": "git"}, {"version": "ca6139ffc67ee6ef0459f81e37894ed411083855", "lessThan": "5c0e3ba4f500fd4314ceb42f07f16bc445156431", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "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"], "versions": [{"version": "4.10", "status": "affected"}, {"version": "0", "lessThan": "4.10", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "7.2"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-72329", "lastModified": "2026-08-17T06:18:36.463", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 6.0, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:22:05.980", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5c0e3ba4f500fd4314ceb42f07f16bc445156431"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/81acef3a247fd523513a2e9f71de1c167bc0f882"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca6139ffc67ee6ef0459f81e37894ed411083855,81acef3a247fd523513a2e9f71de1c167bc0f882)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca6139ffc67ee6ef0459f81e37894ed411083855,5c0e3ba4f500fd4314ceb42f07f16bc445156431)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T18:45:03.373853+00:00", "title": "Use-After-Free in Linux liquidio Driver Leading to Kernel Crash", "updated": "2026-08-17T09:00:05.998609+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}