{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80923",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.801Z",
        "datePublished": "2026-09-09T16:19:43.538Z",
        "dateUpdated": "2026-10-19T08:45:07.298Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:45:07.298Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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()           -> 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)               -> true (dangling)\n              tty_unregister_driver()         -> use-after-free"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/usb/host/xhci-dbgtty.c"
                    ],
                    "versions": [
                        {
                            "version": "4521f16139409cdf9462c7325d43454462cff6c3",
                            "lessThan": "01b7bc0938061f2fd46e0094f6483d8c6c02f7d3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4521f16139409cdf9462c7325d43454462cff6c3",
                            "lessThan": "43635ff6401ca0e0ed21875379eeded921321525",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4521f16139409cdf9462c7325d43454462cff6c3",
                            "lessThan": "eaca2814f32b9872a332326324b9e83e01f156d2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4521f16139409cdf9462c7325d43454462cff6c3",
                            "lessThan": "943f976c93e70563b132f5585ff68b08c89641a2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4521f16139409cdf9462c7325d43454462cff6c3",
                            "lessThan": "0d0faf3cc44c4d86fc6faf5cea972c0fbe00b922",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4521f16139409cdf9462c7325d43454462cff6c3",
                            "lessThan": "33ed35ca629477f57e0dd1d77d6df96cf5a9eb55",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4521f16139409cdf9462c7325d43454462cff6c3",
                            "lessThan": "0e469b94fbba8eb03666da41dd1082b793c50c1a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4521f16139409cdf9462c7325d43454462cff6c3",
                            "lessThan": "a916fa66a43e10f63198b6ce978badffc678821a",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/usb/host/xhci-dbgtty.c"
                    ],
                    "versions": [
                        {
                            "version": "5.9",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.9",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.220",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.187",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.156",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.108",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.49",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.13",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.3",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.9",
                                    "versionEndExcluding": "5.15.220"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.9",
                                    "versionEndExcluding": "6.1.187"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.9",
                                    "versionEndExcluding": "6.6.156"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.9",
                                    "versionEndExcluding": "6.12.108"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.9",
                                    "versionEndExcluding": "6.18.49"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.9",
                                    "versionEndExcluding": "7.1.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.9",
                                    "versionEndExcluding": "7.2.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.9",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/01b7bc0938061f2fd46e0094f6483d8c6c02f7d3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/43635ff6401ca0e0ed21875379eeded921321525"
                },
                {
                    "url": "https://git.kernel.org/stable/c/eaca2814f32b9872a332326324b9e83e01f156d2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/943f976c93e70563b132f5585ff68b08c89641a2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0d0faf3cc44c4d86fc6faf5cea972c0fbe00b922"
                },
                {
                    "url": "https://git.kernel.org/stable/c/33ed35ca629477f57e0dd1d77d6df96cf5a9eb55"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0e469b94fbba8eb03666da41dd1082b793c50c1a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a916fa66a43e10f63198b6ce978badffc678821a"
                }
            ],
            "title": "xhci: dbgtty: Fix unregister on tty_register_driver() failure",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}