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CVE-2026-64547

Estado: RecibidaAlta (8.1)—

In the Linux kernel, the following vulnerability has been resolved:

net: usb: net1080: validate packet_len before pad-byte access in rx_fixup

For an even packet_len, net1080_rx_fixup() reads the pad byte at skb->data[packet_len] before the skb->len != packet_len check further down, and packet_len is only bounded against NC_MAX_PACKET. A malicious NetChip 1080 device can send a short frame advertising a large even packet_len (e.g. 0x4000), so the pad-byte read lands past the end of the skb:

Reject the frame when packet_len >= skb->len before reading.

Detalles técnicos trazas, registros y código del informe original
  BUG: KASAN: slab-out-of-bounds in net1080_rx_fixup
  Read of size 1 at addr ffff8880106c83c6 by task ksoftirqd/0/14
   ...
   net1080_rx_fixup (drivers/net/usb/net1080.c:384)
   usbnet_bh (drivers/net/usb/usbnet.c:1589)
   process_one_work (kernel/workqueue.c:3322)
   bh_worker (kernel/workqueue.c:3708)
   tasklet_action (kernel/softirq.c:965)
   handle_softirqs (kernel/softirq.c:622)
   ...

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Dispositivo USB malicioso en red adyacente (AV:A) sin autenticación explota desbordamiento de búfer en controlador net1080 causando lectura fuera de límites (KASAN slab-out-of-bounds) y denegación de servicio (HIGH severity, A:H).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningThreat Intelligence ProgramPrivileged Account ManagementNetwork SegmentationFilter Network TrafficDisable or Remove Feature or Program

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-64547",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.1,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "904813cd8a0b334189da285bb05af0b18b062502",
              "lessThan": "f42217fa7d535e9ec4151f7971f06f6ea65e850a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "904813cd8a0b334189da285bb05af0b18b062502",
              "lessThan": "c087749815379e9af2fdbeb08bfc33870b103958",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "904813cd8a0b334189da285bb05af0b18b062502",
              "lessThan": "e4a87126c085b097d29e17e3b7647295bba8be7c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "904813cd8a0b334189da285bb05af0b18b062502",
              "lessThan": "685e92934f11d5e215dad58813e2f9955ac2f436",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "904813cd8a0b334189da285bb05af0b18b062502",
              "lessThan": "4dc8484be3302d187274364820d3bef6c62bde32",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "904813cd8a0b334189da285bb05af0b18b062502",
              "lessThan": "b153cfe84b1340c69a13d0957665a2bfcf21239c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "904813cd8a0b334189da285bb05af0b18b062502",
              "lessThan": "ea866cab12db1a2100b400a8b03569e5bc0ee29a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "904813cd8a0b334189da285bb05af0b18b062502",
              "lessThan": "03f384bc0cb8d4a1301d4f5b0baef2d980258383",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/usb/net1080.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.14"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.14",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/usb/net1080.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-07-27T21:17:07.427",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/03f384bc0cb8d4a1301d4f5b0baef2d980258383",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4dc8484be3302d187274364820d3bef6c62bde32",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/685e92934f11d5e215dad58813e2f9955ac2f436",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b153cfe84b1340c69a13d0957665a2bfcf21239c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c087749815379e9af2fdbeb08bfc33870b103958",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e4a87126c085b097d29e17e3b7647295bba8be7c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ea866cab12db1a2100b400a8b03569e5bc0ee29a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f42217fa7d535e9ec4151f7971f06f6ea65e850a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: net1080: validate packet_len before pad-byte access in rx_fixup\n\nFor an even packet_len, net1080_rx_fixup() reads the pad byte at\nskb->data[packet_len] before the skb->len != packet_len check further\ndown, and packet_len is only bounded against NC_MAX_PACKET. A malicious\nNetChip 1080 device can send a short frame advertising a large even\npacket_len (e.g. 0x4000), so the pad-byte read lands past the end of the\nskb:\n\n  BUG: KASAN: slab-out-of-bounds in net1080_rx_fixup\n  Read of size 1 at addr ffff8880106c83c6 by task ksoftirqd/0/14\n   ...\n   net1080_rx_fixup (drivers/net/usb/net1080.c:384)\n   usbnet_bh (drivers/net/usb/usbnet.c:1589)\n   process_one_work (kernel/workqueue.c:3322)\n   bh_worker (kernel/workqueue.c:3708)\n   tasklet_action (kernel/softirq.c:965)\n   handle_softirqs (kernel/softirq.c:622)\n   ...\n\nReject the frame when packet_len >= skb->len before reading."
    }
  ],
  "lastModified": "2026-08-17T05:17:59.960",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}