GHSA-6MCX-V8QC-XX8R

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-19 18:32
VLAI
Details

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

usb: gadget: printer: fix infinite loop in printer_read()

printer_read() uses the same variable for the requested copy size and the number of bytes actually copied to user space. copy_to_user() returns the number of bytes not copied, so when it fails to copy anything, the computed copied length becomes zero.

In that case len, buf, current_rx_bytes and current_rx_buf are left unchanged. If RX data is available and the user buffer remains unwritable, the read loop can repeat indefinitely.

Track the copied length separately and return -EFAULT, or the number of bytes already copied, if an iteration makes no progress.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68369"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:29Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: printer: fix infinite loop in printer_read()\n\nprinter_read() uses the same variable for the requested copy size and\nthe number of bytes actually copied to user space. copy_to_user()\nreturns the number of bytes not copied, so when it fails to copy\nanything, the computed copied length becomes zero.\n\nIn that case len, buf, current_rx_bytes and current_rx_buf are left\nunchanged. If RX data is available and the user buffer remains\nunwritable, the read loop can repeat indefinitely.\n\nTrack the copied length separately and return -EFAULT, or the number of\nbytes already copied, if an iteration makes no progress.",
  "id": "GHSA-6mcx-v8qc-xx8r",
  "modified": "2026-08-19T18:32:17Z",
  "published": "2026-08-10T15:33:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68369"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3081b0e187065c3b9577e393ad664b12854aeaf3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f81197364b57e5318620c75f3bd63f405f60552"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4cde0b38cc0cb8b7dc17295801015148de37d1d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/994afccfdcceb73be33f69a8a8ea71e260c9eca5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2e819be6a5c7f34344926b4bd7e3dfca58cf48a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e03597ad9494b500344076589aeaa6c6d2d381d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e225e2998e5a9b83c838dbbe4511fb0d63f88daf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e41bbbbb1740ce4d7270ab1cdeca13892d6a8d2e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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