{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-90226",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.794Z",
        "datePublished": "2026-09-17T16:07:35.322Z",
        "dateUpdated": "2026-10-19T09:00:02.755Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:00:02.755Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: avoid userspace overflow on invalid optlen\n\nnfc_llcp_getsockopt() casts optval to (u32 __user *) for put_user(), so\nthe kernel always stores 4 bytes regardless of the caller-supplied\noptlen. The existing min_t(u32, len, sizeof(u32)) only clamps the length\nreported back to userspace; it does not constrain the store. A call with\noptlen < 4 therefore writes past the user buffer, violating the\ngetsockopt(2) contract for all five supported optnames.\n\nReject any call with optlen < sizeof(u32) up front. 'len' is int, so a\nplain size comparison would promote a negative optlen to size_t and slip\npast the check; an explicit 'len < 0' test is added first to catch\nnegative values before the size compare."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/nfc/llcp_sock.c"
                    ],
                    "versions": [
                        {
                            "version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
                            "lessThan": "42859562b7cc4313a84a584f338118edb7087066",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
                            "lessThan": "598dcd53c52f8eeb9dd5382198c03960d5d40fcd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
                            "lessThan": "7e40f2f5e7bc06c3ddef781180ce4f7994176547",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
                            "lessThan": "35573c6cb081af2f4a7caeea291302aca5484526",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
                            "lessThan": "b4c5abaea06292e1dddb70eac1b51589b32c77a3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
                            "lessThan": "8bf228fa02b1ed8ce622fb81fa8edc42be9aeb67",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
                            "lessThan": "bd6f1277b62bc1df348ca21739df2bc546fcd493",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
                            "lessThan": "99985bfa8336fadcc69190ba2dcbd5386af3d661",
                            "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/llcp_sock.c"
                    ],
                    "versions": [
                        {
                            "version": "3.10",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.10",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.270",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "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": "3.10",
                                    "versionEndExcluding": "5.10.270"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.10",
                                    "versionEndExcluding": "5.15.221"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.10",
                                    "versionEndExcluding": "6.1.188"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.10",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.10",
                                    "versionEndExcluding": "6.12.110"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.10",
                                    "versionEndExcluding": "6.18.52"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.10",
                                    "versionEndExcluding": "7.2.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.10",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/42859562b7cc4313a84a584f338118edb7087066"
                },
                {
                    "url": "https://git.kernel.org/stable/c/598dcd53c52f8eeb9dd5382198c03960d5d40fcd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7e40f2f5e7bc06c3ddef781180ce4f7994176547"
                },
                {
                    "url": "https://git.kernel.org/stable/c/35573c6cb081af2f4a7caeea291302aca5484526"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b4c5abaea06292e1dddb70eac1b51589b32c77a3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8bf228fa02b1ed8ce622fb81fa8edc42be9aeb67"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bd6f1277b62bc1df348ca21739df2bc546fcd493"
                },
                {
                    "url": "https://git.kernel.org/stable/c/99985bfa8336fadcc69190ba2dcbd5386af3d661"
                }
            ],
            "title": "nfc: llcp: avoid userspace overflow on invalid optlen",
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    }
}