{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-39969", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.149Z", "datePublished": "2025-10-15T07:55:52.948Z", "dateUpdated": "2026-08-05T12:06:38.466Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:06:38.466Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni40e: fix validation of VF state in get resources\n\nVF state I40E_VF_STATE_ACTIVE is not the only state in which\nVF is actually active so it should not be used to determine\nif a VF is allowed to obtain resources.\n\nUse I40E_VF_STATE_RESOURCES_LOADED that is set only in\ni40e_vc_get_vf_resources_msg() and cleared during reset." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The attack is delivered over the i40e SR-IOV virtchnl mailbox by a VF the attacker already controls (guest VM with VF passthrough, or a VFIO-owning container), not over any network protocol. This is local access from the attacking context into the host PF driver.\nAC:L - `VIRTCHNL_OP_GET_VF_RESOURCES` is accepted unconditionally whenever `I40E_VF_STATE_INIT` is set, so the VF can replay it deterministically at any time with no grooming; the deterministic damage (filter teardown, `driver_caps`/`RDMAENA` reset, spurious `ACTIVE`) needs no race at all, and the freed-VSI window is widened by the handler's own `GFP_KERNEL` sleep, which the attacker can hammer at will.\nPR:L - The attacker only needs the ability to drive the VF's admin queue — kernel/root inside the assigned guest or possession of the VFIO device — which is a low-privileged position with respect to the host PF driver under attack. No host-side privileges are required.\nUI:N - The malicious VF sends the virtchnl messages entirely on its own initiative. No host administrator or other user action is needed at any point.\nS:C - The attacker executes in a guest VM (or VF-assigned container) while the corrupted state, the freed-VSI accesses, and the MAC-filter/MMIO programming all occur in the host PF driver's security authority. Impact reaches the hypervisor and other VFs/guests sharing the adapter, crossing the guest/host boundary.\nC:H - The unserialized handler reads `vsi->info.pvid`, `vsi->alloc_queue_pairs` and `vsi->info.qs_handle[0]` from a VSI that `i40e_free_vf_res()` may have already released and echoes those values back to the guest in the `virtchnl_vf_resource` reply, turning a use-after-free read into a direct host-memory disclosure channel. The VF can also read back state belonging to the PF's main VSI when `lan_vsi_idx` has been zeroed.\nI:H - The same path performs `spin_lock_bh(&vsi->mac_filter_hash_lock)` and `i40e_del_mac_filter()` — lock and hash-list writes — on freed memory, a classic UAF write primitive, and can be aimed at `pf->vsi[0]` (the host's main VSI) to delete the host's own L2 filters. Re-toggling `I40E_VF_STATE_RDMAENA` additionally re-opens `i40e_config_rdma_qvlist()`, which programs `I40E_VPINT_CEQCTL` from an unvalidated VF-supplied index.\nA:H - Dereferencing a released `struct i40e_vsi` and taking a spinlock inside freed memory will oops or panic the host kernel, and tearing down a live VF's MAC filters plus corrupting the PF's ACTIVE/RDMA state wedges networking for that VF and the adapter. A host panic takes down the hypervisor and every guest on it, and the VF can retrigger the condition indefinitely." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c", "drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h" ], "versions": [ { "version": "171527da84149c2c7aa6a60a64b09d24f3546298", "lessThan": "185745d56ec958bf8aa773828213237dfcc32f5a", "status": "affected", "versionType": "git" }, { "version": "eb87117c27e729b0aeef4d72ed40d6a1761b0f68", "lessThan": "f47876788a23de296c42ef9d505b5c1630f0b4b8", "status": "affected", "versionType": "git" }, { "version": "2132643b956f553f5abddc9bae20dae267b082e0", "lessThan": "8e35c80f8570426fe0f0cc92b151ebd835975f22", "status": "affected", "versionType": "git" }, { "version": "61125b8be85dfbc7e9c7fe1cc6c6d631ab603516", "lessThan": "6c3981fd59ef11a75005ac9978f034da5a168b6a", "status": "affected", "versionType": "git" }, { "version": "61125b8be85dfbc7e9c7fe1cc6c6d631ab603516", "lessThan": "e748f1ee493f88e38b77363a60499f979d42c58a", "status": "affected", "versionType": "git" }, { "version": "61125b8be85dfbc7e9c7fe1cc6c6d631ab603516", "lessThan": "6128bbc7adc25c87c2f64b5eb66a280b78ef7ab7", "status": "affected", "versionType": "git" }, { "version": "61125b8be85dfbc7e9c7fe1cc6c6d631ab603516", "lessThan": "a991dc56d3e9a2c3db87d0c3f03c24f6595400f1", "status": "affected", "versionType": "git" }, { "version": "61125b8be85dfbc7e9c7fe1cc6c6d631ab603516", "lessThan": "877b7e6ffc23766448236e8732254534c518ba42", "status": "affected", "versionType": "git" }, { "version": "5.4.165", "lessThan": "5.4.300", "status": "affected", "versionType": "semver" }, { "version": "5.10.85", "lessThan": "5.10.245", "status": "affected", "versionType": "semver" }, { "version": "5.15.8", "lessThan": "5.15.194", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c", "drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h" ], "versions": [ { "version": "5.16", "status": "affected" }, { "version": "0", "lessThan": "5.16", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.300", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.245", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.194", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.155", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.109", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.50", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16.10", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17", "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": "5.4.165", "versionEndExcluding": "5.4.300" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.85", "versionEndExcluding": "5.10.245" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.8", "versionEndExcluding": "5.15.194" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.1.155" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.6.109" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.12.50" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.16.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/185745d56ec958bf8aa773828213237dfcc32f5a" }, { "url": "https://git.kernel.org/stable/c/f47876788a23de296c42ef9d505b5c1630f0b4b8" }, { "url": "https://git.kernel.org/stable/c/8e35c80f8570426fe0f0cc92b151ebd835975f22" }, { "url": "https://git.kernel.org/stable/c/6c3981fd59ef11a75005ac9978f034da5a168b6a" }, { "url": "https://git.kernel.org/stable/c/e748f1ee493f88e38b77363a60499f979d42c58a" }, { "url": "https://git.kernel.org/stable/c/6128bbc7adc25c87c2f64b5eb66a280b78ef7ab7" }, { "url": "https://git.kernel.org/stable/c/a991dc56d3e9a2c3db87d0c3f03c24f6595400f1" }, { "url": "https://git.kernel.org/stable/c/877b7e6ffc23766448236e8732254534c518ba42" } ], "title": "i40e: fix validation of VF state in get resources", "x_generator": { "engine": "bippy-1.2.0" } } } }