{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/iavf/iavf_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1b034f2429ce6b45ce74dc266175d277acafc5c4",
              "status": "affected",
              "version": "7c01dbfc8a1c5f8b8e4a7907ab06db1449d478d0",
              "versionType": "git"
            },
            {
              "lessThan": "90cc8b2add29b57288025b51c70bc647e7cccb12",
              "status": "affected",
              "version": "7c01dbfc8a1c5f8b8e4a7907ab06db1449d478d0",
              "versionType": "git"
            },
            {
              "lessThan": "efc54fb13d79117a825fef17364315a58682c7ec",
              "status": "affected",
              "version": "7c01dbfc8a1c5f8b8e4a7907ab06db1449d478d0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/iavf/iavf_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.19",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.9",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niavf: fix PTP use-after-free during reset\n\nCommit 7c01dbfc8a1c5f (\"iavf: periodically cache PHC time\") introduced a\nworker to cache PHC time, but failed to stop it during reset or disable.\n\nThis creates a race condition where `iavf_reset_task()` or\n`iavf_disable_vf()` free adapter resources (AQ) while the worker is still\nrunning. If the worker triggers `iavf_queue_ptp_cmd()` during teardown, it\naccesses freed memory/locks, leading to a crash.\n\nFix this by calling `iavf_ptp_release()` before tearing down the adapter.\nThis ensures `ptp_clock_unregister()` synchronously cancels the worker and\ncleans up the chardev before the backing resources are destroyed."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable reset/disable paths are reached through local netdevice/PTP control paths, not by processing remote packets. A local actor can trigger iavf reset via MTU/feature changes while the PTP worker or PTP clock access queues PHC reads.\nAC:L - The race can be driven repeatedly by triggering resets while the PTP aux worker runs periodically, and a privileged local actor can also issue concurrent PTP clock reads. Per kernel guidance, this use-after-free race is low complexity.\nPR:L - Reset-triggering netdevice operations require CAP_NET_ADMIN in the device\u0027s network namespace, enforced through namespace-capable checks. Since iavf devices are not netns-immutable and may be delegated to a user-owned netns/container, this is low privileges rather than init-namespace root only.\nUI:N - No victim action is required once the attacker has local access and the iavf VF with PTP support is present. The attacker can initiate the reset/clock activity directly.\nS:U - The corruption occurs within the same kernel security authority as the vulnerable iavf driver. This is standard local kernel compromise/DoS, not a guest-to-host or IOMMU boundary crossing.\nC:H - The bug is a use-after-free involving freed adapter/Admin Queue resources and locks. Following kernel guidance, UAF memory corruption can provide high confidentiality impact through exploitable kernel memory access.\nI:H - The UAF can corrupt or reuse kernel objects/resources during teardown and can plausibly be exploited for control-flow or arbitrary write primitives. Kernel guidance treats use-after-free as high integrity impact.\nA:H - The reported failure mode is a kernel crash in the PTP worker/iavf path during reset teardown. Any reproducible kernel oops/panic from this UAF is high availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:28:00.059Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1b034f2429ce6b45ce74dc266175d277acafc5c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/90cc8b2add29b57288025b51c70bc647e7cccb12"
        },
        {
          "url": "https://git.kernel.org/stable/c/efc54fb13d79117a825fef17364315a58682c7ec"
        }
      ],
      "title": "iavf: fix PTP use-after-free during reset",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43447",
    "datePublished": "2026-05-08T14:22:13.988Z",
    "dateReserved": "2026-05-01T14:12:56.010Z",
    "dateUpdated": "2026-08-05T12:28:00.059Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}