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        "cveId": "CVE-2021-46904",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-02-25T13:45:52.716Z",
        "datePublished": "2024-02-25T14:03:40.319Z",
        "dateUpdated": "2024-08-04T05:17:42.846Z"
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                "dateUpdated": "2024-05-29T04:58:34.938Z"
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                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hso: fix null-ptr-deref during tty device unregistration\n\nMultiple ttys try to claim the same the minor number causing a double\nunregistration of the same device. The first unregistration succeeds\nbut the next one results in a null-ptr-deref.\n\nThe get_free_serial_index() function returns an available minor number\nbut doesn't assign it immediately. The assignment is done by the caller\nlater. But before this assignment, calls to get_free_serial_index()\nwould return the same minor number.\n\nFix this by modifying get_free_serial_index to assign the minor number\nimmediately after one is found to be and rename it to obtain_minor()\nto better reflect what it does. Similary, rename set_serial_by_index()\nto release_minor() and modify it to free up the minor number of the\ngiven hso_serial. Every obtain_minor() should have corresponding\nrelease_minor() call."
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                    "vendor": "Linux",
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                    "programFiles": [
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                    ],
                    "versions": [
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                            "version": "2.6.27",
                            "status": "affected"
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                        {
                            "version": "0",
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                            "status": "unaffected",
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                            "lessThanOrEqual": "4.14.*",
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                        },
                        {
                            "version": "4.19.187",
                            "lessThanOrEqual": "4.19.*",
                            "status": "unaffected",
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                        },
                        {
                            "version": "5.4.112",
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                            "status": "unaffected",
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                        },
                        {
                            "version": "5.10.30",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
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                        },
                        {
                            "version": "5.11.14",
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                            "status": "unaffected",
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                        {
                            "version": "5.12",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
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                    "url": "https://git.kernel.org/stable/c/8a12f8836145ffe37e9c8733dce18c22fb668b66"
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