{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-31721",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-03-09T15:48:24.134Z",
        "datePublished": "2026-05-01T14:14:23.492Z",
        "dateUpdated": "2026-05-11T22:14:28.436Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:14:28.436Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_hid: move list and spinlock inits from bind to alloc\n\nThere was an issue when you did the following:\n- setup and bind an hid gadget\n- open /dev/hidg0\n- use the resulting fd in EPOLL_CTL_ADD\n- unbind the UDC\n- bind the UDC\n- use the fd in EPOLL_CTL_DEL\n\nWhen CONFIG_DEBUG_LIST was enabled, a list_del corruption was reported\nwithin remove_wait_queue (via ep_remove_wait_queue). After some\ndebugging I found out that the queues, which f_hid registers via\npoll_wait were the problem. These were initialized using\ninit_waitqueue_head inside hidg_bind. So effectively, the bind function\nre-initialized the queues while there were still items in them.\n\nThe solution is to move the initialization from hidg_bind to hidg_alloc\nto extend their lifetimes to the lifetime of the function instance.\n\nAdditionally, I found many other possibly problematic init calls in the\nbind function, which I moved as well."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/usb/gadget/function/f_hid.c"
                    ],
                    "versions": [
                        {
                            "version": "cb382536052fcc7713988869b54a81137069e5a9",
                            "lessThan": "13440c0db227c5db01da751ed966dde4cdd2ea18",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cb382536052fcc7713988869b54a81137069e5a9",
                            "lessThan": "de93e0862169b5539e00c2b9980b93fd80c37c0d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cb382536052fcc7713988869b54a81137069e5a9",
                            "lessThan": "81aee4500055876883658b024b6fb61801afe134",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cb382536052fcc7713988869b54a81137069e5a9",
                            "lessThan": "8ec6a58586f195a88479edcdb0b8027c39f12d03",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cb382536052fcc7713988869b54a81137069e5a9",
                            "lessThan": "f7d00ee1c8082c8a134340aaf16d71a27e29c362",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cb382536052fcc7713988869b54a81137069e5a9",
                            "lessThan": "5d1bb391ceeebb28327703dd07af8c6324af298f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cb382536052fcc7713988869b54a81137069e5a9",
                            "lessThan": "26a879a41ed960b3fb4ec773ef2788c515c0e488",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cb382536052fcc7713988869b54a81137069e5a9",
                            "lessThan": "4e0a88254ad59f6c53a34bf5fa241884ec09e8b2",
                            "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/function/f_hid.c"
                    ],
                    "versions": [
                        {
                            "version": "3.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.253",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.203",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.169",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.135",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.81",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.22",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.12",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "3.19",
                                    "versionEndExcluding": "5.10.253"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "5.15.203"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "6.1.169"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "6.6.135"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "6.12.81"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "6.18.22"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "6.19.12"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/13440c0db227c5db01da751ed966dde4cdd2ea18"
                },
                {
                    "url": "https://git.kernel.org/stable/c/de93e0862169b5539e00c2b9980b93fd80c37c0d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/81aee4500055876883658b024b6fb61801afe134"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8ec6a58586f195a88479edcdb0b8027c39f12d03"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f7d00ee1c8082c8a134340aaf16d71a27e29c362"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5d1bb391ceeebb28327703dd07af8c6324af298f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/26a879a41ed960b3fb4ec773ef2788c515c0e488"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4e0a88254ad59f6c53a34bf5fa241884ec09e8b2"
                }
            ],
            "title": "usb: gadget: f_hid: move list and spinlock inits from bind to alloc",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}