{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "afba937e540c902c989cd516fd97ea0c8499bb27"
            },
            {
              "fixed": "638328ca9c17ae6511ad62198c57bae32ffa3c91"
            },
            {
              "fixed": "170e8daca24da6edb4be82ab01abf44e87af387b"
            },
            {
              "fixed": "c8fa96ed021923dae147bcd9f9205b8df7b82360"
            },
            {
              "fixed": "4ee3062bf2c9a722afef429826e8607eaf3fc6a0"
            },
            {
              "fixed": "276aef0fd2b92f41b920ac891c72cadeee957934"
            },
            {
              "fixed": "67ed312124bb1b61858778ac0b985b48961c862a"
            },
            {
              "fixed": "e3c874b05901dc519054b5107d16620e6d2b5fea"
            },
            {
              "fixed": "8df672bfe3ec2268c2636584202755898e547173"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.26"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.167"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.130"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.78"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.19"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43427.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: class: cdc-wdm: fix reordering issue in read code path\n\nQuoting the bug report:\n\nDue to compiler optimization or CPU out-of-order execution, the\ndesc-\u003elength update can be reordered before the memmove. If this\nhappens, wdm_read() can see the new length and call copy_to_user() on\nuninitialized memory. This also violates LKMM data race rules [1].\n\nFix it by using WRITE_ONCE and memory barriers.",
  "id": "CVE-2026-43427",
  "modified": "2026-07-15T01:49:21.490455084Z",
  "published": "2026-05-08T14:22:00.345Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5fea"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43427.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43427"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "usb: class: cdc-wdm: fix reordering issue in read code path"
}