CVE-2025-37813 (GCVE-0-2025-37813)
Vulnerability from cvelistv5
Published
2025-05-08 06:26
Modified
2025-05-26 05:21
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Fix invalid pointer dereference in Etron workaround This check is performed before prepare_transfer() and prepare_ring(), so enqueue can already point at the final link TRB of a segment. And indeed it will, some 0.4% of times this code is called. Then enqueue + 1 is an invalid pointer. It will crash the kernel right away or load some junk which may look like a link TRB and cause the real link TRB to be replaced with a NOOP. This wouldn't end well. Use a functionally equivalent test which doesn't dereference the pointer and always gives correct result. Something has crashed my machine twice in recent days while playing with an Etron HC, and a control transfer stress test ran for confirmation has just crashed it again. The same test passes with this patch applied.
References
Impacted products
Vendor Product Version
Linux Linux Version: fbc0a0c7718a6cb1dc5e0811a4f88a2b1deedfa1
Version: 9258c9ed32294ce3a4b58c9d92fc49ba030d35c9
Version: 5e1c67abc9301d05130b7e267c204e7005503b33
Version: 5e1c67abc9301d05130b7e267c204e7005503b33
Version: 4725344ca645a98a9d8e45e25b01a2244de5b8aa
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/host/xhci-ring.c"
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          "vendor": "Linux",
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        {
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          "programFiles": [
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.89",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.26",
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            {
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              "status": "unaffected",
              "version": "6.14.5",
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              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.6.66",
                  "vulnerable": true
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                {
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                  "versionStartIncluding": "6.11.11",
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              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: xhci: Fix invalid pointer dereference in Etron workaround\n\nThis check is performed before prepare_transfer() and prepare_ring(), so\nenqueue can already point at the final link TRB of a segment. And indeed\nit will, some 0.4% of times this code is called.\n\nThen enqueue + 1 is an invalid pointer. It will crash the kernel right\naway or load some junk which may look like a link TRB and cause the real\nlink TRB to be replaced with a NOOP. This wouldn\u0027t end well.\n\nUse a functionally equivalent test which doesn\u0027t dereference the pointer\nand always gives correct result.\n\nSomething has crashed my machine twice in recent days while playing with\nan Etron HC, and a control transfer stress test ran for confirmation has\njust crashed it again. The same test passes with this patch applied."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:21:24.931Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/142273a49f2c315eabdbdf5a71c15e479b75ca91"
        },
        {
          "url": "https://git.kernel.org/stable/c/bce3055b08e303e28a8751f6073066f5c33a0744"
        },
        {
          "url": "https://git.kernel.org/stable/c/0624e29c595b05e7a0e6d1c368f0a05799928e30"
        },
        {
          "url": "https://git.kernel.org/stable/c/1ea050da5562af9b930d17cbbe9632d30f5df43a"
        }
      ],
      "title": "usb: xhci: Fix invalid pointer dereference in Etron workaround",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37813",
    "datePublished": "2025-05-08T06:26:10.000Z",
    "dateReserved": "2025-04-16T04:51:23.946Z",
    "dateUpdated": "2025-05-26T05:21:24.931Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37813\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-08T07:15:52.523\",\"lastModified\":\"2025-05-08T14:39:09.683\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: xhci: Fix invalid pointer dereference in Etron workaround\\n\\nThis check is performed before prepare_transfer() and prepare_ring(), so\\nenqueue can already point at the final link TRB of a segment. And indeed\\nit will, some 0.4% of times this code is called.\\n\\nThen enqueue + 1 is an invalid pointer. It will crash the kernel right\\naway or load some junk which may look like a link TRB and cause the real\\nlink TRB to be replaced with a NOOP. This wouldn\u0027t end well.\\n\\nUse a functionally equivalent test which doesn\u0027t dereference the pointer\\nand always gives correct result.\\n\\nSomething has crashed my machine twice in recent days while playing with\\nan Etron HC, and a control transfer stress test ran for confirmation has\\njust crashed it again. The same test passes with this patch applied.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: xhci: Corregir desreferencia de puntero no v\u00e1lida en el workaround de Etron Esta comprobaci\u00f3n se realiza antes de prepare_transfer() y prepare_ring(), por lo que enqueue ya puede apuntar al TRB de enlace final de un segmento. Y de hecho lo har\u00e1, alrededor del 0,4% de las veces que se llama a este c\u00f3digo. Entonces enqueue + 1 es un puntero no v\u00e1lido. Har\u00e1 que el kernel se caiga de inmediato o cargar\u00e1 algo basura que puede parecer un TRB de enlace y hacer que el TRB de enlace real se reemplace con un NOOP. Esto no terminar\u00eda bien. Utilice una prueba funcionalmente equivalente que no desreferencia el puntero y siempre d\u00e9 un resultado correcto. Algo ha hecho que mi m\u00e1quina se caiga dos veces en los \u00faltimos d\u00edas mientras jugaba con un Etron HC, y una prueba de estr\u00e9s de transferencia de control ejecutada para confirmaci\u00f3n la acaba de hacer caer de nuevo. La misma prueba pasa con este parche aplicado.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0624e29c595b05e7a0e6d1c368f0a05799928e30\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/142273a49f2c315eabdbdf5a71c15e479b75ca91\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1ea050da5562af9b930d17cbbe9632d30f5df43a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bce3055b08e303e28a8751f6073066f5c33a0744\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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