FKIE_CVE-2026-64343

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: ldusb: fix use-after-free on disconnect race mutex_unlock() may access the mutex structure after releasing the lock and therefore cannot be used to manage lifetime of objects directly (unlike spinlocks and refcounts). [1][2] Use a kref to release the driver data to avoid use-after-free in mutex_unlock() when release() races with disconnect(). [1] a51749ab34d9 ("locking/mutex: Document that mutex_unlock() is non-atomic") [2] 2b9d9e0a9ba0 ("locking/mutex: Clarify that mutex_unlock(), and most other sleeping locks, can still use the lock object after it's unlocked")
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19bdfc7b3c179331eafa423d87e1336f43bbfeb8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a3e794136ab5e3ad1e7019175a4b837aec86db4b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/af59829e67e11ba2511a9f8e4b9111afc7d1f550
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d8f69404e1d671326f86d378b9f5bfbd56490e9d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fc55923a972e715f9a27187b47d4920709e23d85
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/misc/ldusb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fc55923a972e715f9a27187b47d4920709e23d85",
              "status": "affected",
              "version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
              "versionType": "git"
            },
            {
              "lessThan": "e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69",
              "status": "affected",
              "version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
              "versionType": "git"
            },
            {
              "lessThan": "af59829e67e11ba2511a9f8e4b9111afc7d1f550",
              "status": "affected",
              "version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
              "versionType": "git"
            },
            {
              "lessThan": "02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4",
              "status": "affected",
              "version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
              "versionType": "git"
            },
            {
              "lessThan": "d8f69404e1d671326f86d378b9f5bfbd56490e9d",
              "status": "affected",
              "version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
              "versionType": "git"
            },
            {
              "lessThan": "2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915",
              "status": "affected",
              "version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
              "versionType": "git"
            },
            {
              "lessThan": "a3e794136ab5e3ad1e7019175a4b837aec86db4b",
              "status": "affected",
              "version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
              "versionType": "git"
            },
            {
              "lessThan": "19bdfc7b3c179331eafa423d87e1336f43bbfeb8",
              "status": "affected",
              "version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/misc/ldusb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.26"
            },
            {
              "lessThan": "2.6.26",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "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: ldusb: fix use-after-free on disconnect race\n\nmutex_unlock() may access the mutex structure after releasing the lock\nand therefore cannot be used to manage lifetime of objects directly\n(unlike spinlocks and refcounts). [1][2]\n\nUse a kref to release the driver data to avoid use-after-free in\nmutex_unlock() when release() races with disconnect().\n\n[1] a51749ab34d9 (\"locking/mutex: Document that mutex_unlock() is\n                   non-atomic\")\n[2] 2b9d9e0a9ba0 (\"locking/mutex: Clarify that mutex_unlock(), and most\n                   other sleeping locks, can still use the lock object\n                   after it\u0027s unlocked\")"
    }
  ],
  "id": "CVE-2026-64343",
  "lastModified": "2026-07-25T10:17:16.353",
  "metrics": {},
  "published": "2026-07-25T10:17:16.353",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/19bdfc7b3c179331eafa423d87e1336f43bbfeb8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a3e794136ab5e3ad1e7019175a4b837aec86db4b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/af59829e67e11ba2511a9f8e4b9111afc7d1f550"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d8f69404e1d671326f86d378b9f5bfbd56490e9d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fc55923a972e715f9a27187b47d4920709e23d85"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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