{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "06b376432974fe5f25f2843a8e8438c6a1cf3d50"
            },
            {
              "fixed": "61a2fb25551be0375bc16ef2a70c987dfca26183"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.12"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90336.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: core: clear freed pointers on uart_register_driver() failure\n\nuart_register_driver() leaves drv-\u003estate pointing to freed memory when\ntty_alloc_driver() fails. If tty_register_driver() fails, drv-\u003etty_driver\nalso retains a pointer after its reference is dropped.\n\nDrivers that use drv-\u003estate as an \"already registered\" flag can then skip\nregistration on the next probe and pass the freed state to\nuart_add_one_port().\n\nThis issue was found with failslab on QEMU's raspi1ap board by\nfailing registration and binding the PL011 port again.\n\nClear both pointers on their failure paths, as uart_unregister_driver()\nalready does.",
  "id": "CVE-2026-90336",
  "modified": "2026-09-19T03:30:19.969039653Z",
  "published": "2026-09-17T16:08:49.016Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/06b376432974fe5f25f2843a8e8438c6a1cf3d50"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61a2fb25551be0375bc16ef2a70c987dfca26183"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90336.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90336"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "serial: core: clear freed pointers on uart_register_driver() failure"
}