FKIE_CVE-2026-68369

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-19 17:20
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3081b0e187065c3b9577e393ad664b12854aeaf3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3f81197364b57e5318620c75f3bd63f405f60552
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4cde0b38cc0cb8b7dc17295801015148de37d1d2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/994afccfdcceb73be33f69a8a8ea71e260c9eca5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c2e819be6a5c7f34344926b4bd7e3dfca58cf48a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e03597ad9494b500344076589aeaa6c6d2d381d3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e225e2998e5a9b83c838dbbe4511fb0d63f88daf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e41bbbbb1740ce4d7270ab1cdeca13892d6a8d2e
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_printer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3f81197364b57e5318620c75f3bd63f405f60552",
              "status": "affected",
              "version": "b185f01a9ab7af586133be2555298e960237359b",
              "versionType": "git"
            },
            {
              "lessThan": "e225e2998e5a9b83c838dbbe4511fb0d63f88daf",
              "status": "affected",
              "version": "b185f01a9ab7af586133be2555298e960237359b",
              "versionType": "git"
            },
            {
              "lessThan": "3081b0e187065c3b9577e393ad664b12854aeaf3",
              "status": "affected",
              "version": "b185f01a9ab7af586133be2555298e960237359b",
              "versionType": "git"
            },
            {
              "lessThan": "994afccfdcceb73be33f69a8a8ea71e260c9eca5",
              "status": "affected",
              "version": "b185f01a9ab7af586133be2555298e960237359b",
              "versionType": "git"
            },
            {
              "lessThan": "e03597ad9494b500344076589aeaa6c6d2d381d3",
              "status": "affected",
              "version": "b185f01a9ab7af586133be2555298e960237359b",
              "versionType": "git"
            },
            {
              "lessThan": "4cde0b38cc0cb8b7dc17295801015148de37d1d2",
              "status": "affected",
              "version": "b185f01a9ab7af586133be2555298e960237359b",
              "versionType": "git"
            },
            {
              "lessThan": "e41bbbbb1740ce4d7270ab1cdeca13892d6a8d2e",
              "status": "affected",
              "version": "b185f01a9ab7af586133be2555298e960237359b",
              "versionType": "git"
            },
            {
              "lessThan": "c2e819be6a5c7f34344926b4bd7e3dfca58cf48a",
              "status": "affected",
              "version": "b185f01a9ab7af586133be2555298e960237359b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_printer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.1"
            },
            {
              "lessThan": "4.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2026-68369",
  "lastModified": "2026-08-19T17:20:46.477",
  "metrics": {},
  "published": "2026-08-10T13:20:29.670",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3081b0e187065c3b9577e393ad664b12854aeaf3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3f81197364b57e5318620c75f3bd63f405f60552"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4cde0b38cc0cb8b7dc17295801015148de37d1d2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/994afccfdcceb73be33f69a8a8ea71e260c9eca5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c2e819be6a5c7f34344926b4bd7e3dfca58cf48a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e03597ad9494b500344076589aeaa6c6d2d381d3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e225e2998e5a9b83c838dbbe4511fb0d63f88daf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e41bbbbb1740ce4d7270ab1cdeca13892d6a8d2e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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