{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-31509",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-03-09T15:48:24.106Z",
        "datePublished": "2026-04-22T13:54:27.436Z",
        "dateUpdated": "2026-05-11T22:10:10.109Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:10:10.109Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix circular locking dependency in nci_close_device\n\nnci_close_device() flushes rx_wq and tx_wq while holding req_lock.\nThis causes a circular locking dependency because nci_rx_work()\nrunning on rx_wq can end up taking req_lock too:\n\n  nci_rx_work -> nci_rx_data_packet -> nci_data_exchange_complete\n    -> __sk_destruct -> rawsock_destruct -> nfc_deactivate_target\n    -> nci_deactivate_target -> nci_request -> mutex_lock(&ndev->req_lock)\n\nMove the flush of rx_wq after req_lock has been released.\nThis should safe (I think) because NCI_UP has already been cleared\nand the transport is closed, so the work will see it and return\n-ENETDOWN.\n\nNIPA has been hitting this running the nci selftest with a debug\nkernel on roughly 4% of the runs."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/nfc/nci/core.c"
                    ],
                    "versions": [
                        {
                            "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
                            "lessThan": "7ed00a3edc8597fe2333f524401e2889aa1b5edf",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
                            "lessThan": "5eef9ebec7f5738f12cadede3545c05b34bf5ac3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
                            "lessThan": "ca54e904a071aa65ef3ad46ba42d51aaac6b73b4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
                            "lessThan": "eb435d150ca74b4d40f77f1a2266f3636ed64a79",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
                            "lessThan": "1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
                            "lessThan": "d89b74bf08f067b55c03d7f999ba0a0e73177eb3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
                            "lessThan": "09143c0e8f3b03517e6233aad42f45c794d8df8e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
                            "lessThan": "4527025d440ce84bf56e75ce1df2e84cb8178616",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/nfc/nci/core.c"
                    ],
                    "versions": [
                        {
                            "version": "3.2",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.2",
                            "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": "6.1.168",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.131",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.80",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.21",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.11",
                            "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": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.2",
                                    "versionEndExcluding": "5.10.253"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/7ed00a3edc8597fe2333f524401e2889aa1b5edf"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5eef9ebec7f5738f12cadede3545c05b34bf5ac3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ca54e904a071aa65ef3ad46ba42d51aaac6b73b4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/eb435d150ca74b4d40f77f1a2266f3636ed64a79"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d89b74bf08f067b55c03d7f999ba0a0e73177eb3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/09143c0e8f3b03517e6233aad42f45c794d8df8e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4527025d440ce84bf56e75ce1df2e84cb8178616"
                }
            ],
            "title": "nfc: nci: fix circular locking dependency in nci_close_device",
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}