{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-50704",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-24T10:53:15.518Z",
        "datePublished": "2025-12-24T10:55:19.295Z",
        "dateUpdated": "2026-05-11T19:23:52.960Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:23:52.960Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: gadget: Fix use-after-free during usb config switch\n\nIn the process of switching USB config from rndis to other config,\nif the hardware does not support the ->pullup callback, or the\nhardware encounters a low probability fault, both of them may cause\nthe ->pullup callback to fail, which will then cause a system panic\n(use after free).\n\nThe gadget drivers sometimes need to be unloaded regardless of the\nhardware's behavior.\n\nAnalysis as follows:\n=======================================================================\n(1) write /config/usb_gadget/g1/UDC \"none\"\n\ngether_disconnect+0x2c/0x1f8\nrndis_disable+0x4c/0x74\ncomposite_disconnect+0x74/0xb0\nconfigfs_composite_disconnect+0x60/0x7c\nusb_gadget_disconnect+0x70/0x124\nusb_gadget_unregister_driver+0xc8/0x1d8\ngadget_dev_desc_UDC_store+0xec/0x1e4\n\n(2) rm /config/usb_gadget/g1/configs/b.1/f1\n\nrndis_deregister+0x28/0x54\nrndis_free+0x44/0x7c\nusb_put_function+0x14/0x1c\nconfig_usb_cfg_unlink+0xc4/0xe0\nconfigfs_unlink+0x124/0x1c8\nvfs_unlink+0x114/0x1dc\n\n(3) rmdir /config/usb_gadget/g1/functions/rndis.gs4\n\npanic+0x1fc/0x3d0\ndo_page_fault+0xa8/0x46c\ndo_mem_abort+0x3c/0xac\nel1_sync_handler+0x40/0x78\n0xffffff801138f880\nrndis_close+0x28/0x34\neth_stop+0x74/0x110\ndev_close_many+0x48/0x194\nrollback_registered_many+0x118/0x814\nunregister_netdev+0x20/0x30\ngether_cleanup+0x1c/0x38\nrndis_attr_release+0xc/0x14\nkref_put+0x74/0xb8\nconfigfs_rmdir+0x314/0x374\n\nIf gadget->ops->pullup() return an error, function rndis_close() will be\ncalled, then it will causes a use-after-free problem.\n======================================================================="
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/usb/gadget/udc/core.c"
                    ],
                    "versions": [
                        {
                            "version": "0a55187a1ec8c03d0619e7ce41d10fdc39cff036",
                            "lessThan": "30e926aa835ac2e6ad05822e4cb75833feb0d99f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0a55187a1ec8c03d0619e7ce41d10fdc39cff036",
                            "lessThan": "99a58ac42d9b6911834b0224b6782aea0c311346",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0a55187a1ec8c03d0619e7ce41d10fdc39cff036",
                            "lessThan": "afdc12887f2b2ecf20d065a7d81ad29824155083",
                            "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/gadget/udc/core.c"
                    ],
                    "versions": [
                        {
                            "version": "4.20",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.20",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.16",
                            "lessThanOrEqual": "6.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.2",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2",
                            "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": "4.20",
                                    "versionEndExcluding": "6.0.16"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "6.1.2"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "6.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/30e926aa835ac2e6ad05822e4cb75833feb0d99f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/99a58ac42d9b6911834b0224b6782aea0c311346"
                },
                {
                    "url": "https://git.kernel.org/stable/c/afdc12887f2b2ecf20d065a7d81ad29824155083"
                }
            ],
            "title": "USB: gadget: Fix use-after-free during usb config switch",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}