FKIE_CVE-2026-43479

Vulnerability from fkie_nvd - Published: 2026-05-13 16:16 - Updated: 2026-06-26 20:17
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: usb: lan78xx: fix WARN in __netif_napi_del_locked on disconnect Remove redundant netif_napi_del() call from disconnect path. A WARN may be triggered in __netif_napi_del_locked() during USB device disconnect: WARNING: CPU: 0 PID: 11 at net/core/dev.c:7417 __netif_napi_del_locked+0x2b4/0x350 This happens because netif_napi_del() is called in the disconnect path while NAPI is still enabled. However, it is not necessary to call netif_napi_del() explicitly, since unregister_netdev() will handle NAPI teardown automatically and safely. Removing the redundant call avoids triggering the warning. Full trace: lan78xx 1-1:1.0 enu1: Failed to read register index 0x000000c4. ret = -ENODEV lan78xx 1-1:1.0 enu1: Failed to set MAC down with error -ENODEV lan78xx 1-1:1.0 enu1: Link is Down lan78xx 1-1:1.0 enu1: Failed to read register index 0x00000120. ret = -ENODEV ------------[ cut here ]------------ WARNING: CPU: 0 PID: 11 at net/core/dev.c:7417 __netif_napi_del_locked+0x2b4/0x350 Modules linked in: flexcan can_dev fuse CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted 6.16.0-rc2-00624-ge926949dab03 #9 PREEMPT Hardware name: SKOV IMX8MP CPU revC - bd500 (DT) Workqueue: usb_hub_wq hub_event pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __netif_napi_del_locked+0x2b4/0x350 lr : __netif_napi_del_locked+0x7c/0x350 sp : ffffffc085b673c0 x29: ffffffc085b673c0 x28: ffffff800b7f2000 x27: ffffff800b7f20d8 x26: ffffff80110bcf58 x25: ffffff80110bd978 x24: 1ffffff0022179eb x23: ffffff80110bc000 x22: ffffff800b7f5000 x21: ffffff80110bc000 x20: ffffff80110bcf38 x19: ffffff80110bcf28 x18: dfffffc000000000 x17: ffffffc081578940 x16: ffffffc08284cee0 x15: 0000000000000028 x14: 0000000000000006 x13: 0000000000040000 x12: ffffffb0022179e8 x11: 1ffffff0022179e7 x10: ffffffb0022179e7 x9 : dfffffc000000000 x8 : 0000004ffdde8619 x7 : ffffff80110bcf3f x6 : 0000000000000001 x5 : ffffff80110bcf38 x4 : ffffff80110bcf38 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 1ffffff0022179e7 x0 : 0000000000000000 Call trace: __netif_napi_del_locked+0x2b4/0x350 (P) lan78xx_disconnect+0xf4/0x360 usb_unbind_interface+0x158/0x718 device_remove+0x100/0x150 device_release_driver_internal+0x308/0x478 device_release_driver+0x1c/0x30 bus_remove_device+0x1a8/0x368 device_del+0x2e0/0x7b0 usb_disable_device+0x244/0x540 usb_disconnect+0x220/0x758 hub_event+0x105c/0x35e0 process_one_work+0x760/0x17b0 worker_thread+0x768/0xce8 kthread+0x3bc/0x690 ret_from_fork+0x10/0x20 irq event stamp: 211604 hardirqs last enabled at (211603): [<ffffffc0828cc9ec>] _raw_spin_unlock_irqrestore+0x84/0x98 hardirqs last disabled at (211604): [<ffffffc0828a9a84>] el1_dbg+0x24/0x80 softirqs last enabled at (211296): [<ffffffc080095f10>] handle_softirqs+0x820/0xbc8 softirqs last disabled at (210993): [<ffffffc080010288>] __do_softirq+0x18/0x20 ---[ end trace 0000000000000000 ]--- lan78xx 1-1:1.0 enu1: failed to kill vid 0081/0
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/20ce2bd1c1848414c5d3520d301ed3f5751ed634Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/312c816c6bc30342bc30dca0d6db617ab4d3ae4ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/395a8b903738511f536c97c427e15ef038e1a11cPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/usb/lan78xx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "20ce2bd1c1848414c5d3520d301ed3f5751ed634",
              "status": "affected",
              "version": "e110bc82589752909e283ba5cbc160e0ab56c085",
              "versionType": "git"
            },
            {
              "lessThan": "395a8b903738511f536c97c427e15ef038e1a11c",
              "status": "affected",
              "version": "e110bc82589752909e283ba5cbc160e0ab56c085",
              "versionType": "git"
            },
            {
              "lessThan": "312c816c6bc30342bc30dca0d6db617ab4d3ae4e",
              "status": "affected",
              "version": "e110bc82589752909e283ba5cbc160e0ab56c085",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/usb/lan78xx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "25416534-40E3-4D42-9162-AB375255352E",
              "versionEndExcluding": "6.18.19",
              "versionStartIncluding": "6.17",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E825E7C3-FEAC-4FD3-8A81-78D7387948C9",
              "versionEndExcluding": "6.19.9",
              "versionStartIncluding": "6.19",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: lan78xx: fix WARN in __netif_napi_del_locked on disconnect\n\nRemove redundant netif_napi_del() call from disconnect path.\n\nA WARN may be triggered in __netif_napi_del_locked() during USB device\ndisconnect:\n\n  WARNING: CPU: 0 PID: 11 at net/core/dev.c:7417 __netif_napi_del_locked+0x2b4/0x350\n\nThis happens because netif_napi_del() is called in the disconnect path while\nNAPI is still enabled. However, it is not necessary to call netif_napi_del()\nexplicitly, since unregister_netdev() will handle NAPI teardown automatically\nand safely. Removing the redundant call avoids triggering the warning.\n\nFull trace:\n lan78xx 1-1:1.0 enu1: Failed to read register index 0x000000c4. ret = -ENODEV\n lan78xx 1-1:1.0 enu1: Failed to set MAC down with error -ENODEV\n lan78xx 1-1:1.0 enu1: Link is Down\n lan78xx 1-1:1.0 enu1: Failed to read register index 0x00000120. ret = -ENODEV\n ------------[ cut here ]------------\n WARNING: CPU: 0 PID: 11 at net/core/dev.c:7417 __netif_napi_del_locked+0x2b4/0x350\n Modules linked in: flexcan can_dev fuse\n CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted 6.16.0-rc2-00624-ge926949dab03 #9 PREEMPT\n Hardware name: SKOV IMX8MP CPU revC - bd500 (DT)\n Workqueue: usb_hub_wq hub_event\n pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : __netif_napi_del_locked+0x2b4/0x350\n lr : __netif_napi_del_locked+0x7c/0x350\n sp : ffffffc085b673c0\n x29: ffffffc085b673c0 x28: ffffff800b7f2000 x27: ffffff800b7f20d8\n x26: ffffff80110bcf58 x25: ffffff80110bd978 x24: 1ffffff0022179eb\n x23: ffffff80110bc000 x22: ffffff800b7f5000 x21: ffffff80110bc000\n x20: ffffff80110bcf38 x19: ffffff80110bcf28 x18: dfffffc000000000\n x17: ffffffc081578940 x16: ffffffc08284cee0 x15: 0000000000000028\n x14: 0000000000000006 x13: 0000000000040000 x12: ffffffb0022179e8\n x11: 1ffffff0022179e7 x10: ffffffb0022179e7 x9 : dfffffc000000000\n x8 : 0000004ffdde8619 x7 : ffffff80110bcf3f x6 : 0000000000000001\n x5 : ffffff80110bcf38 x4 : ffffff80110bcf38 x3 : 0000000000000000\n x2 : 0000000000000000 x1 : 1ffffff0022179e7 x0 : 0000000000000000\n Call trace:\n  __netif_napi_del_locked+0x2b4/0x350 (P)\n  lan78xx_disconnect+0xf4/0x360\n  usb_unbind_interface+0x158/0x718\n  device_remove+0x100/0x150\n  device_release_driver_internal+0x308/0x478\n  device_release_driver+0x1c/0x30\n  bus_remove_device+0x1a8/0x368\n  device_del+0x2e0/0x7b0\n  usb_disable_device+0x244/0x540\n  usb_disconnect+0x220/0x758\n  hub_event+0x105c/0x35e0\n  process_one_work+0x760/0x17b0\n  worker_thread+0x768/0xce8\n  kthread+0x3bc/0x690\n  ret_from_fork+0x10/0x20\n irq event stamp: 211604\n hardirqs last  enabled at (211603): [\u003cffffffc0828cc9ec\u003e] _raw_spin_unlock_irqrestore+0x84/0x98\n hardirqs last disabled at (211604): [\u003cffffffc0828a9a84\u003e] el1_dbg+0x24/0x80\n softirqs last  enabled at (211296): [\u003cffffffc080095f10\u003e] handle_softirqs+0x820/0xbc8\n softirqs last disabled at (210993): [\u003cffffffc080010288\u003e] __do_softirq+0x18/0x20\n ---[ end trace 0000000000000000 ]---\n lan78xx 1-1:1.0 enu1: failed to kill vid 0081/0"
    }
  ],
  "id": "CVE-2026-43479",
  "lastModified": "2026-06-26T20:17:50.027",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-05-13T16:16:51.040",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/20ce2bd1c1848414c5d3520d301ed3f5751ed634"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/312c816c6bc30342bc30dca0d6db617ab4d3ae4e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/395a8b903738511f536c97c427e15ef038e1a11c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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