{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "4521f16139409cdf9462c7325d43454462cff6c3"
            },
            {
              "fixed": "01b7bc0938061f2fd46e0094f6483d8c6c02f7d3"
            },
            {
              "fixed": "43635ff6401ca0e0ed21875379eeded921321525"
            },
            {
              "fixed": "eaca2814f32b9872a332326324b9e83e01f156d2"
            },
            {
              "fixed": "943f976c93e70563b132f5585ff68b08c89641a2"
            },
            {
              "fixed": "0d0faf3cc44c4d86fc6faf5cea972c0fbe00b922"
            },
            {
              "fixed": "33ed35ca629477f57e0dd1d77d6df96cf5a9eb55"
            },
            {
              "fixed": "0e469b94fbba8eb03666da41dd1082b793c50c1a"
            },
            {
              "fixed": "a916fa66a43e10f63198b6ce978badffc678821a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.9.0"
            },
            {
              "fixed": "5.15.220"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.187"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.156"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.108"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.49"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.13"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "7.2.0"
            },
            {
              "fixed": "7.2.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80923.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxhci: dbgtty: Fix unregister on tty_register_driver() failure\n\nIf tty_register_driver() fails, it drops the reference, but fails to set\nthe global dbc_tty_driver to NULL, causing the unregister to be called\nagain when module exits.\n\nOn module unload dbc_tty_exit() only gates its cleanup on the driver\npointer being non-NULL, so it operates on the already-freed driver:\n\n    module_init(xhci_hcd_init)\n      xhci_hcd_init()\n        xhci_dbc_init()                       [return value ignored]\n          dbc_tty_init()\n            tty_register_driver() fails\n              tty_driver_kref_put()           -\u003e driver freed\n              (dbc_tty_driver left dangling)\n    ...\n    module_exit(xhci_hcd_fini)\n      xhci_hcd_fini()\n        xhci_dbc_exit()\n          dbc_tty_exit()\n            if (dbc_tty_driver)               -\u003e true (dangling)\n              tty_unregister_driver()         -\u003e use-after-free",
  "id": "CVE-2026-80923",
  "modified": "2026-09-10T03:30:41.600247360Z",
  "published": "2026-09-09T16:19:43.538Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01b7bc0938061f2fd46e0094f6483d8c6c02f7d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d0faf3cc44c4d86fc6faf5cea972c0fbe00b922"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e469b94fbba8eb03666da41dd1082b793c50c1a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/33ed35ca629477f57e0dd1d77d6df96cf5a9eb55"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43635ff6401ca0e0ed21875379eeded921321525"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/943f976c93e70563b132f5585ff68b08c89641a2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a916fa66a43e10f63198b6ce978badffc678821a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eaca2814f32b9872a332326324b9e83e01f156d2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80923.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80923"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "xhci: dbgtty: Fix unregister on tty_register_driver() failure"
}