CVE-2025-23138 (GCVE-0-2025-23138)
Vulnerability from cvelistv5
Published
2025-04-16 14:13
Modified
2025-05-26 05:19
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: watch_queue: fix pipe accounting mismatch Currently, watch_queue_set_size() modifies the pipe buffers charged to user->pipe_bufs without updating the pipe->nr_accounted on the pipe itself, due to the if (!pipe_has_watch_queue()) test in pipe_resize_ring(). This means that when the pipe is ultimately freed, we decrement user->pipe_bufs by something other than what than we had charged to it, potentially leading to an underflow. This in turn can cause subsequent too_many_pipe_buffers_soft() tests to fail with -EPERM. To remedy this, explicitly account for the pipe usage in watch_queue_set_size() to match the number set via account_pipe_buffers() (It's unclear why watch_queue_set_size() does not update nr_accounted; it may be due to intentional overprovisioning in watch_queue_set_size()?)
References
Impacted products
Vendor Product Version
Linux Linux Version: 162ae0e78bdabf84ef10c1293c4ed7865cb7d3c8
Version: 3efbd114b91525bb095b8ae046382197d92126b9
Version: b87a1229d8668fbc78ebd9ca0fc797a76001c60f
Version: 68e51bdb1194f11d3452525b99c98aff6f837b24
Version: e95aada4cb93d42e25c30a0ef9eb2923d9711d4a
Version: e95aada4cb93d42e25c30a0ef9eb2923d9711d4a
Version: e95aada4cb93d42e25c30a0ef9eb2923d9711d4a
Version: e95aada4cb93d42e25c30a0ef9eb2923d9711d4a
Version: 6fb70694f8d1ac34e45246b0ac988f025e1e5b55
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{
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          "programFiles": [
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwatch_queue: fix pipe accounting mismatch\n\nCurrently, watch_queue_set_size() modifies the pipe buffers charged to\nuser-\u003epipe_bufs without updating the pipe-\u003enr_accounted on the pipe\nitself, due to the if (!pipe_has_watch_queue()) test in\npipe_resize_ring(). This means that when the pipe is ultimately freed,\nwe decrement user-\u003epipe_bufs by something other than what than we had\ncharged to it, potentially leading to an underflow. This in turn can\ncause subsequent too_many_pipe_buffers_soft() tests to fail with -EPERM.\n\nTo remedy this, explicitly account for the pipe usage in\nwatch_queue_set_size() to match the number set via account_pipe_buffers()\n\n(It\u0027s unclear why watch_queue_set_size() does not update nr_accounted;\nit may be due to intentional overprovisioning in watch_queue_set_size()?)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:19:17.699Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8658c75343ed00e5e154ebbe24335f51ba8db547"
        },
        {
          "url": "https://git.kernel.org/stable/c/471c89b7d4f58bd6082f7c1fe14d4ca15c7f1284"
        },
        {
          "url": "https://git.kernel.org/stable/c/d40e3537265dea9e3c33021874437ff26dc18787"
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          "url": "https://git.kernel.org/stable/c/6dafa27764183738dc5368b669b71e3d0d154f12"
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        {
          "url": "https://git.kernel.org/stable/c/2d680b988656bb556c863d8b46d9b9096842bf3d"
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        {
          "url": "https://git.kernel.org/stable/c/205028ebba838938d3b264dda1d0708fa7fe1ade"
        },
        {
          "url": "https://git.kernel.org/stable/c/f13abc1e8e1a3b7455511c4e122750127f6bc9b0"
        }
      ],
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-23138",
    "datePublished": "2025-04-16T14:13:17.866Z",
    "dateReserved": "2025-01-11T14:28:41.511Z",
    "dateUpdated": "2025-05-26T05:19:17.699Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-23138\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-04-16T15:16:08.163\",\"lastModified\":\"2025-04-17T20:22:16.240\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwatch_queue: fix pipe accounting mismatch\\n\\nCurrently, watch_queue_set_size() modifies the pipe buffers charged to\\nuser-\u003epipe_bufs without updating the pipe-\u003enr_accounted on the pipe\\nitself, due to the if (!pipe_has_watch_queue()) test in\\npipe_resize_ring(). This means that when the pipe is ultimately freed,\\nwe decrement user-\u003epipe_bufs by something other than what than we had\\ncharged to it, potentially leading to an underflow. This in turn can\\ncause subsequent too_many_pipe_buffers_soft() tests to fail with -EPERM.\\n\\nTo remedy this, explicitly account for the pipe usage in\\nwatch_queue_set_size() to match the number set via account_pipe_buffers()\\n\\n(It\u0027s unclear why watch_queue_set_size() does not update nr_accounted;\\nit may be due to intentional overprovisioning in watch_queue_set_size()?)\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: watch_queue: correcci\u00f3n de la discrepancia en la contabilidad de la tuber\u00eda. Actualmente, watch_queue_set_size() modifica los b\u00faferes de la tuber\u00eda cargados a user-\u0026gt;pipe_bufs sin actualizar pipe-\u0026gt;nr_accounted en la propia tuber\u00eda, debido a la prueba if (!pipe_has_watch_queue()) en pipe_resize_ring(). Esto significa que, cuando la tuber\u00eda se libera finalmente, se decrementa user-\u0026gt;pipe_bufs en un valor distinto al que se le hab\u00eda cargado, lo que podr\u00eda provocar un desbordamiento. Esto, a su vez, puede provocar que las pruebas too_many_pipe_buffers_soft() posteriores fallen con -EPERM. Para remediar esto, tenga en cuenta expl\u00edcitamente el uso de la tuber\u00eda en watch_queue_set_size() para que coincida con el n\u00famero establecido mediante account_pipe_buffers() (no est\u00e1 claro por qu\u00e9 watch_queue_set_size() no actualiza nr_accounted; puede deberse a un exceso de aprovisionamiento intencional en watch_queue_set_size()).\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/205028ebba838938d3b264dda1d0708fa7fe1ade\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2d680b988656bb556c863d8b46d9b9096842bf3d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/471c89b7d4f58bd6082f7c1fe14d4ca15c7f1284\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/56ec918e6c86c1536870e4373e91eddd0c44245f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6dafa27764183738dc5368b669b71e3d0d154f12\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8658c75343ed00e5e154ebbe24335f51ba8db547\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d40e3537265dea9e3c33021874437ff26dc18787\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f13abc1e8e1a3b7455511c4e122750127f6bc9b0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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