{
  "id": "CVE-2025-21850",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-03-12T10:15:17.507",
  "lastModified": "2025-03-13T16:29:12.770",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: Fix crash when a namespace is disabled\n\nThe namespace percpu counter protects pending I/O, and we can\nonly safely diable the namespace once the counter drop to zero.\nOtherwise we end up with a crash when running blktests/nvme/058\n(eg for loop transport):\n\n[ 2352.930426] [  T53909] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN PTI\n[ 2352.930431] [  T53909] KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]\n[ 2352.930434] [  T53909] CPU: 3 UID: 0 PID: 53909 Comm: kworker/u16:5 Tainted: G        W          6.13.0-rc6 #232\n[ 2352.930438] [  T53909] Tainted: [W]=WARN\n[ 2352.930440] [  T53909] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014\n[ 2352.930443] [  T53909] Workqueue: nvmet-wq nvme_loop_execute_work [nvme_loop]\n[ 2352.930449] [  T53909] RIP: 0010:blkcg_set_ioprio+0x44/0x180\n\nas the queue is already torn down when calling submit_bio();\n\nSo we need to init the percpu counter in nvmet_ns_enable(), and\nwait for it to drop to zero in nvmet_ns_disable() to avoid having\nI/O pending after the namespace has been disabled."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nvmet: corrige el fallo cuando se deshabilita un espacio de nombres. El contador por CPU del espacio de nombres protege la E/S pendiente y solo podemos deshabilitar de forma segura el espacio de nombres una vez que el contador cae a cero. De lo contrario, terminamos con un bloqueo al ejecutar blktests/nvme/058 (por ejemplo, para el transporte de bucle): [2352.930426] [T53909] Ups: error de protecci\u00f3n general, probablemente para la direcci\u00f3n no can\u00f3nica 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN PTI [2352.930431] [T53909] KASAN: null-ptr-deref en el rango [0x0000000000000028-0x000000000000002f] [2352.930434] [T53909] CPU: 3 UID: 0 PID: 53909 Comm: kworker/u16:5 Tainted: GW 6.13.0-rc6 #232 [ 2352.930438] [ T53909] Contaminado: [W]=WARN [ 2352.930440] [ T53909] Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 01/04/2014 [ 2352.930443] [ T53909] Cola de trabajo: nvmet-wq nvme_loop_execute_work [nvme_loop] [ 2352.930449] [ T53909] RIP: 0010:blkcg_set_ioprio+0x44/0x180 ya que la cola ya est\u00e1 desactivada al llamar a submit_bio(); Entonces, necesitamos inicializar el contador por CPU en nvmet_ns_enable() y esperar hasta que caiga a cero en nvmet_ns_disable() para evitar tener E/S pendiente despu\u00e9s de que se haya deshabilitado el espacio de nombres."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-835"
        }
      ]
    }
  ],
  "configurations": [
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          "operator": "OR",
          "negate": false,
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  "references": [
    {
      "url": "https://git.kernel.org/stable/c/4082326807072b71496501b6a0c55ffe8d5092a5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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