FKIE_CVE-2026-64345

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-07-25 10:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_printer: take kref only for successful open printer_open() returns -EBUSY when the character device is already open, but it increments dev->kref regardless of the return value. VFS does not call ->release() for a failed open, so every rejected second open permanently leaks one reference. Move kref_get() into the successful-open branch.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/30adce93d5c4a5a1ec29d9249e3fdfcc391d406b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/75c0ad13e136961328253742501b4efc3988a587
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7f1f24c367938c5537e2308bf9a965f051d14774
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8a5eba992c862b0c94411eecf9b7121e8636db38
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/94ec20d97aa51547965a539f660a1fe79c6929a3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bf20c94fa6aaff945f0ae3a23f3212cd299f28d9
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": "94ec20d97aa51547965a539f660a1fe79c6929a3",
              "status": "affected",
              "version": "e8d5f92b8d30bb4ade76494490c3c065e12411b1",
              "versionType": "git"
            },
            {
              "lessThan": "75c0ad13e136961328253742501b4efc3988a587",
              "status": "affected",
              "version": "e8d5f92b8d30bb4ade76494490c3c065e12411b1",
              "versionType": "git"
            },
            {
              "lessThan": "bf20c94fa6aaff945f0ae3a23f3212cd299f28d9",
              "status": "affected",
              "version": "e8d5f92b8d30bb4ade76494490c3c065e12411b1",
              "versionType": "git"
            },
            {
              "lessThan": "8a5eba992c862b0c94411eecf9b7121e8636db38",
              "status": "affected",
              "version": "e8d5f92b8d30bb4ade76494490c3c065e12411b1",
              "versionType": "git"
            },
            {
              "lessThan": "7f1f24c367938c5537e2308bf9a965f051d14774",
              "status": "affected",
              "version": "e8d5f92b8d30bb4ade76494490c3c065e12411b1",
              "versionType": "git"
            },
            {
              "lessThan": "30adce93d5c4a5a1ec29d9249e3fdfcc391d406b",
              "status": "affected",
              "version": "e8d5f92b8d30bb4ade76494490c3c065e12411b1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "25c95c6bd4dc50a3c20de0fa7f450ea02b2320fc",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4a47581cf010dc351d8069978080fdb000c0776d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d9fe88b2a38dc700bf5bd3a09c7cd11bbc248367",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cedb0187b8ba929c3f76f28e6bc25804d65f8a54",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e9e791f5c39ab30e374a3b1a9c25ca7ff24988f3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "34f026263889e2827e04acdc3a0eb9ecbd191ef0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5f845e5d18d151230476cf90aa46449f69ba2ef1",
              "versionType": "git"
            },
            {
              "lessThan": "4.5",
              "status": "affected",
              "version": "4.4.241",
              "versionType": "semver"
            },
            {
              "lessThan": "4.10",
              "status": "affected",
              "version": "4.9.241",
              "versionType": "semver"
            },
            {
              "lessThan": "4.15",
              "status": "affected",
              "version": "4.14.203",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.154",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.73",
              "versionType": "semver"
            },
            {
              "lessThan": "5.9",
              "status": "affected",
              "version": "5.8.17",
              "versionType": "semver"
            },
            {
              "lessThan": "5.10",
              "status": "affected",
              "version": "5.9.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "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": "5.10"
            },
            {
              "lessThan": "5.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc3",
              "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: f_printer: take kref only for successful open\n\nprinter_open() returns -EBUSY when the character device is already\nopen, but it increments dev-\u003ekref regardless of the return value. VFS\ndoes not call -\u003erelease() for a failed open, so every rejected second\nopen permanently leaks one reference.\n\nMove kref_get() into the successful-open branch."
    }
  ],
  "id": "CVE-2026-64345",
  "lastModified": "2026-07-25T10:17:16.623",
  "metrics": {},
  "published": "2026-07-25T10:17:16.623",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/30adce93d5c4a5a1ec29d9249e3fdfcc391d406b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/75c0ad13e136961328253742501b4efc3988a587"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7f1f24c367938c5537e2308bf9a965f051d14774"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8a5eba992c862b0c94411eecf9b7121e8636db38"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/94ec20d97aa51547965a539f660a1fe79c6929a3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bf20c94fa6aaff945f0ae3a23f3212cd299f28d9"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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