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CVE-2023-53847

Estado: AplazadaSin puntuar—

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

usb-storage: alauda: Fix uninit-value in alauda_check_media()

Syzbot got KMSAN to complain about access to an uninitialized value in the alauda subdriver of usb-storage:

The problem is that alauda_check_media() doesn't verify that its USB transfer succeeded before trying to use the received data. What should happen if the transfer fails isn't entirely clear, but a reasonably conservative approach is to pretend that no media is present.

A similar problem exists in a usb_stor_dbg() call in alauda_get_media_status(). In this case, when an error occurs the call is redundant, because usb_stor_ctrl_transfer() already will print a debugging message.

Leer descripción completaMostrar menos

Finally, unrelated to the uninitialized memory access, is the fact that alauda_check_media() performs DMA to a buffer on the stack. Fortunately usb-storage provides a general purpose DMA-able buffer for uses like this. We'll use it instead.

Detalles técnicos trazas, registros y código del informe original
BUG: KMSAN: uninit-value in alauda_transport+0x462/0x57f0
drivers/usb/storage/alauda.c:1137
CPU: 0 PID: 12279 Comm: usb-storage Not tainted 5.3.0-rc7+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
  __dump_stack lib/dump_stack.c:77 [inline]
  dump_stack+0x191/0x1f0 lib/dump_stack.c:113
  kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108
  __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250
  alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:460

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)

Mostrar
{
  "id": "CVE-2023-53847",
  "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": "e80b0fade09ef1ee67b0898d480d4c588f124d5f",
              "lessThan": "153c3e85873cc3e2f387169783c3a227bad9a95a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e80b0fade09ef1ee67b0898d480d4c588f124d5f",
              "lessThan": "49d380bcd6cba987c6085fae6464c9c087e8d9a0",
              "versionType": "git"
            },
            {
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              "version": "e80b0fade09ef1ee67b0898d480d4c588f124d5f",
              "lessThan": "044f4446e06bb03c52216697b14867ebc555ad3b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e80b0fade09ef1ee67b0898d480d4c588f124d5f",
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              "versionType": "git"
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            {
              "status": "affected",
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              "lessThan": "7a11d1e2625bdb2346f6586773b20b20977278ac",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e80b0fade09ef1ee67b0898d480d4c588f124d5f",
              "lessThan": "0d2d5282d39aed6f27dfe1ed60a5f3934ebd21cd",
              "versionType": "git"
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            {
              "status": "affected",
              "version": "e80b0fade09ef1ee67b0898d480d4c588f124d5f",
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              "versionType": "git"
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            {
              "status": "affected",
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              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/usb/storage/alauda.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.16"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.16",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "4.14.323",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "status": "unaffected",
              "version": "4.19.292",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "status": "unaffected",
              "version": "5.4.254",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.191",
              "versionType": "semver",
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            },
            {
              "status": "unaffected",
              "version": "5.15.127",
              "versionType": "semver",
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            },
            {
              "status": "unaffected",
              "version": "6.1.46",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.4.11",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/usb/storage/alauda.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-09T16:17:25.137",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/044f4446e06bb03c52216697b14867ebc555ad3b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/373e0ab8c4c516561493f1acf367c7ee7dc053c2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/49d380bcd6cba987c6085fae6464c9c087e8d9a0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb-storage: alauda: Fix uninit-value in alauda_check_media()\n\nSyzbot got KMSAN to complain about access to an uninitialized value in\nthe alauda subdriver of usb-storage:\n\nBUG: KMSAN: uninit-value in alauda_transport+0x462/0x57f0\ndrivers/usb/storage/alauda.c:1137\nCPU: 0 PID: 12279 Comm: usb-storage Not tainted 5.3.0-rc7+ #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS\nGoogle 01/01/2011\nCall Trace:\n  __dump_stack lib/dump_stack.c:77 [inline]\n  dump_stack+0x191/0x1f0 lib/dump_stack.c:113\n  kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108\n  __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250\n  alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:460\n\nThe problem is that alauda_check_media() doesn't verify that its USB\ntransfer succeeded before trying to use the received data.  What\nshould happen if the transfer fails isn't entirely clear, but a\nreasonably conservative approach is to pretend that no media is\npresent.\n\nA similar problem exists in a usb_stor_dbg() call in\nalauda_get_media_status().  In this case, when an error occurs the\ncall is redundant, because usb_stor_ctrl_transfer() already will print\na debugging message.\n\nFinally, unrelated to the uninitialized memory access, is the fact\nthat alauda_check_media() performs DMA to a buffer on the stack.\nFortunately usb-storage provides a general purpose DMA-able buffer for\nuses like this.  We'll use it instead."
    }
  ],
  "lastModified": "2026-06-17T06:46:10.597",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}