FKIE_CVE-2025-68762

Vulnerability from fkie_nvd - Published: 2026-01-05 10:15 - Updated: 2026-10-14 19:10
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: net: netpoll: initialize work queue before error checks Prevent a kernel warning when netconsole setup fails on devices with IFF_DISABLE_NETPOLL flag. The warning (at kernel/workqueue.c:4242 in __flush_work) occurs because the cleanup path tries to cancel an uninitialized work queue. When __netpoll_setup() encounters a device with IFF_DISABLE_NETPOLL, it fails early and calls skb_pool_flush() for cleanup. This function calls cancel_work_sync(&np->refill_wq), but refill_wq hasn't been initialized yet, triggering the warning. Move INIT_WORK() to the beginning of __netpoll_setup(), ensuring the work queue is properly initialized before any potential failure points. This allows the cleanup path to safely cancel the work queue regardless of where the setup fails.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/760bc6ceda8e2c273c0e2018ad2595967c3dd308
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a90d0dc38a10347078cca60e7495ad0648838f18
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e5235eb6cfe02a51256013a78f7b28779a7740d5
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/netpoll.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a90d0dc38a10347078cca60e7495ad0648838f18",
              "status": "affected",
              "version": "248f6571fd4c51531f7f8f07f186f7ae98a50afc",
              "versionType": "git"
            },
            {
              "lessThan": "760bc6ceda8e2c273c0e2018ad2595967c3dd308",
              "status": "affected",
              "version": "248f6571fd4c51531f7f8f07f186f7ae98a50afc",
              "versionType": "git"
            },
            {
              "lessThan": "e5235eb6cfe02a51256013a78f7b28779a7740d5",
              "status": "affected",
              "version": "248f6571fd4c51531f7f8f07f186f7ae98a50afc",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/core/netpoll.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": "6.17.*",
              "status": "unaffected",
              "version": "6.17.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "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: netpoll: initialize work queue before error checks\n\nPrevent a kernel warning when netconsole setup fails on devices with\nIFF_DISABLE_NETPOLL flag. The warning (at kernel/workqueue.c:4242 in\n__flush_work) occurs because the cleanup path tries to cancel an\nuninitialized work queue.\n\nWhen __netpoll_setup() encounters a device with IFF_DISABLE_NETPOLL,\nit fails early and calls skb_pool_flush() for cleanup. This function\ncalls cancel_work_sync(\u0026np-\u003erefill_wq), but refill_wq hasn\u0027t been\ninitialized yet, triggering the warning.\n\nMove INIT_WORK() to the beginning of __netpoll_setup(), ensuring the\nwork queue is properly initialized before any potential failure points.\nThis allows the cleanup path to safely cancel the work queue regardless\nof where the setup fails."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: netpoll: inicializar cola de trabajo antes de las comprobaciones de errores\n\nPrevenir una advertencia del kernel cuando la configuraci\u00f3n de netconsole falla en dispositivos con la bandera IFF_DISABLE_NETPOLL. La advertencia (en kernel/workqueue.c:4242 en __flush_work) ocurre porque la ruta de limpieza intenta cancelar una cola de trabajo no inicializada.\n\nCuando __netpoll_setup() encuentra un dispositivo con IFF_DISABLE_NETPOLL, falla tempranamente y llama a skb_pool_flush() para la limpieza. Esta funci\u00f3n llama a cancel_work_sync(\u0026np  -\u003e  refill_wq), pero refill_wq a\u00fan no ha sido inicializada, lo que desencadena la advertencia.\n\nMover INIT_WORK() al principio de __netpoll_setup(), asegurando que la cola de trabajo est\u00e9 correctamente inicializada antes de cualquier punto de fallo potencial. Esto permite a la ruta de limpieza cancelar de forma segura la cola de trabajo independientemente de d\u00f3nde falle la configuraci\u00f3n."
    }
  ],
  "id": "CVE-2025-68762",
  "lastModified": "2026-10-14T19:10:00.297",
  "metrics": {},
  "published": "2026-01-05T10:15:57.353",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/760bc6ceda8e2c273c0e2018ad2595967c3dd308"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a90d0dc38a10347078cca60e7495ad0648838f18"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e5235eb6cfe02a51256013a78f7b28779a7740d5"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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