CVE-2025-39969 (GCVE-0-2025-39969)
Vulnerability from cvelistv5
Published
2025-10-15 07:55
Modified
2026-08-05 12:06
Severity ?
8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: i40e: fix validation of VF state in get resources VF state I40E_VF_STATE_ACTIVE is not the only state in which VF is actually active so it should not be used to determine if a VF is allowed to obtain resources. Use I40E_VF_STATE_RESOURCES_LOADED that is set only in i40e_vc_get_vf_resources_msg() and cleared during reset.
References
Impacted products
Vendor Product Version
Linux Linux Version: 171527da84149c2c7aa6a60a64b09d24f3546298
Version: eb87117c27e729b0aeef4d72ed40d6a1761b0f68
Version: 2132643b956f553f5abddc9bae20dae267b082e0
Version: 61125b8be85dfbc7e9c7fe1cc6c6d631ab603516
Version: 61125b8be85dfbc7e9c7fe1cc6c6d631ab603516
Version: 61125b8be85dfbc7e9c7fe1cc6c6d631ab603516
Version: 61125b8be85dfbc7e9c7fe1cc6c6d631ab603516
Version: 61125b8be85dfbc7e9c7fe1cc6c6d631ab603516
Version: 5.4.165   ≤
Version: 5.10.85   ≤
Version: 5.15.8   ≤
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c",
            "drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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            },
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              "status": "affected",
              "version": "5.15.8",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c",
            "drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.300",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.245",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.194",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.155",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.300",
                  "versionStartIncluding": "5.4.165",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.245",
                  "versionStartIncluding": "5.10.85",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.194",
                  "versionStartIncluding": "5.15.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.155",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.109",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.50",
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                },
                {
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                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.17",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "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\u0027s own `GFP_KERNEL` sleep, which the attacker can hammer at will.\nPR:L - The attacker only needs the ability to drive the VF\u0027s admin queue \u2014 kernel/root inside the assigned guest or possession of the VFIO device \u2014 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\u0027s 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-\u003einfo.pvid`, `vsi-\u003ealloc_queue_pairs` and `vsi-\u003einfo.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\u0027s main VSI when `lan_vsi_idx` has been zeroed.\nI:H - The same path performs `spin_lock_bh(\u0026vsi-\u003emac_filter_hash_lock)` and `i40e_del_mac_filter()` \u2014 lock and hash-list writes \u2014 on freed memory, a classic UAF write primitive, and can be aimed at `pf-\u003evsi[0]` (the host\u0027s main VSI) to delete the host\u0027s 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\u0027s MAC filters plus corrupting the PF\u0027s 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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:06:38.466Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39969",
    "datePublished": "2025-10-15T07:55:52.948Z",
    "dateReserved": "2025-04-16T07:20:57.149Z",
    "dateUpdated": "2026-08-05T12:06:38.466Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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