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CVE-2026-74680

Estado: RecibidaSin puntuar—

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

usb: atm: cxacru: properly kill rcv_urb on error in cxacru_cm()

If cxacru_cm() encounters an error while submitting or waiting for snd_urb, it aborts and returns the error without killing the already submitted rcv_urb. This leaves the rcv_urb active.

When this happens during initialization (e.g., in cxacru_atm_start()), the driver may ignore the error and proceed to call cxacru_poll_status(), which invokes cxacru_cm() again. Attempting to submit the still-active rcv_urb triggers a warning in usb_submit_urb():

To fix this, ensure that rcv_urb is properly killed if cxacru_cm() aborts early.

Leer descripción completaMostrar menos

We can safely call usb_kill_urb() on rcv_urb in the error path, as it is safe to call even if the URB is not active (e.g., if it failed to submit in the first place, or if it already completed).

Detalles técnicos trazas, registros y código del informe original
cxacru 1-1:1.0: send of cm 0x84 failed (-104)
ATM dev 0: cxacru_atm_start: CHIP_ADSL_LINE_START returned -104
------------[ cut here ]------------
URB ffff88812658d200 submitted while active
WARNING: drivers/usb/core/urb.c:379 at usb_submit_urb+0x79/0x18b0
drivers/usb/core/urb.c:379
...
Call Trace:
 <TASK>
 cxacru_cm+0x21a/0xf10 drivers/usb/atm/cxacru.c:631
 cxacru_cm_get_array drivers/usb/atm/cxacru.c:722 [inline]
 cxacru_poll_status+0x178/0x1110 drivers/usb/atm/cxacru.c:828
 cxacru_atm_start+0x185/0x360 drivers/usb/atm/cxacru.c:814
 usbatm_atm_init+0x144/0x3a0 drivers/usb/atm/usbatm.c:927
 usbatm_usb_probe+0x15cb/0x1db0 drivers/usb/atm/usbatm.c:1178
 cxacru_usb_probe+0x17f/0x220 drivers/usb/atm/cxacru.c:1370
...

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

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).

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)

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{
  "id": "CVE-2026-74680",
  "cveTags": [],
  "metrics": {},
  "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": "1b0e614652344a2d39eb336f3dc07651782883bf",
              "lessThan": "6133b461058316e3ccba7331f974d110d4c08b23",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1b0e614652344a2d39eb336f3dc07651782883bf",
              "lessThan": "61093d7f1144f6a15bac505df35e5f535ade2ac1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1b0e614652344a2d39eb336f3dc07651782883bf",
              "lessThan": "645d98dbccdbfdbf0129f48822af7183492de091",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1b0e614652344a2d39eb336f3dc07651782883bf",
              "lessThan": "993f7677949e3d72e360e86eed1f41c2511f75ed",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1b0e614652344a2d39eb336f3dc07651782883bf",
              "lessThan": "939b6a41f681aea52af678053072ee443068e93e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1b0e614652344a2d39eb336f3dc07651782883bf",
              "lessThan": "2f73a065791d2a8e3f0bdf29248e33600359e865",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1b0e614652344a2d39eb336f3dc07651782883bf",
              "lessThan": "0af047703dbed8224552587ed436f14a24371b46",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1b0e614652344a2d39eb336f3dc07651782883bf",
              "lessThan": "c2f811314be351d86b6ab41e9297ae80d8da6f86",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/usb/atm/cxacru.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.13"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.13",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/usb/atm/cxacru.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-22T16:16:42.227",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0af047703dbed8224552587ed436f14a24371b46",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2f73a065791d2a8e3f0bdf29248e33600359e865",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/61093d7f1144f6a15bac505df35e5f535ade2ac1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6133b461058316e3ccba7331f974d110d4c08b23",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/645d98dbccdbfdbf0129f48822af7183492de091",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/939b6a41f681aea52af678053072ee443068e93e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/993f7677949e3d72e360e86eed1f41c2511f75ed",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c2f811314be351d86b6ab41e9297ae80d8da6f86",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: atm: cxacru: properly kill rcv_urb on error in cxacru_cm()\n\nIf cxacru_cm() encounters an error while submitting or waiting for snd_urb,\nit aborts and returns the error without killing the already submitted\nrcv_urb. This leaves the rcv_urb active.\n\nWhen this happens during initialization (e.g., in cxacru_atm_start()), the\ndriver may ignore the error and proceed to call cxacru_poll_status(), which\ninvokes cxacru_cm() again. Attempting to submit the still-active rcv_urb\ntriggers a warning in usb_submit_urb():\n\ncxacru 1-1:1.0: send of cm 0x84 failed (-104)\nATM dev 0: cxacru_atm_start: CHIP_ADSL_LINE_START returned -104\n------------[ cut here ]------------\nURB ffff88812658d200 submitted while active\nWARNING: drivers/usb/core/urb.c:379 at usb_submit_urb+0x79/0x18b0\ndrivers/usb/core/urb.c:379\n...\nCall Trace:\n <TASK>\n cxacru_cm+0x21a/0xf10 drivers/usb/atm/cxacru.c:631\n cxacru_cm_get_array drivers/usb/atm/cxacru.c:722 [inline]\n cxacru_poll_status+0x178/0x1110 drivers/usb/atm/cxacru.c:828\n cxacru_atm_start+0x185/0x360 drivers/usb/atm/cxacru.c:814\n usbatm_atm_init+0x144/0x3a0 drivers/usb/atm/usbatm.c:927\n usbatm_usb_probe+0x15cb/0x1db0 drivers/usb/atm/usbatm.c:1178\n cxacru_usb_probe+0x17f/0x220 drivers/usb/atm/cxacru.c:1370\n...\n\nTo fix this, ensure that rcv_urb is properly killed if cxacru_cm() aborts\nearly. We can safely call usb_kill_urb() on rcv_urb in the error path, as\nit is safe to call even if the URB is not active (e.g., if it failed to\nsubmit in the first place, or if it already completed)."
    }
  ],
  "lastModified": "2026-08-22T16:16:42.227",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}