{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-31738",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-03-09T15:48:24.138Z",
        "datePublished": "2026-05-01T14:14:34.900Z",
        "dateUpdated": "2026-05-23T16:05:52.050Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T16:05:52.050Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: validate ND option lengths in vxlan_na_create\n\nvxlan_na_create() walks ND options according to option-provided\nlengths. A malformed option can make the parser advance beyond the\ncomputed option span or use a too-short source LLADDR option payload.\n\nValidate option lengths against the remaining NS option area before\nadvancing, and only read source LLADDR when the option is large enough\nfor an Ethernet address."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/vxlan/vxlan_core.c"
                    ],
                    "versions": [
                        {
                            "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
                            "lessThan": "901c1dd3bab2955d7e664f914c374c8c3ac2b958",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
                            "lessThan": "e476745917a1e288eb15e7ff49d286a86a4861d3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
                            "lessThan": "2029712fb2c87e9a8c75094906f2ee29bf08c500",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
                            "lessThan": "602596c69a70e50d9ab8c6ae0290a01f88229dd7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
                            "lessThan": "de20d2e3b9179d132f5f5b44e490d7c916c6321b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
                            "lessThan": "eddfce70a6f3107d1679b0c2fcbeb96b593bd679",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
                            "lessThan": "b69c4236255bd8de16cd876e58c6f0867d1d78b1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
                            "lessThan": "afa9a05e6c4971bd5586f1b304e14d61fb3d9385",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d8be18c52dbc94989f6d74637b731af39cd3d902",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3927dace523706cc00f808520eaf2125dd7c07b5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3.12.18",
                            "lessThan": "3.13",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "3.13.10",
                            "lessThan": "3.14",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/vxlan/vxlan_core.c"
                    ],
                    "versions": [
                        {
                            "version": "3.14",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.14",
                            "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": "6.6.134",
                            "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": "3.14",
                                    "versionEndExcluding": "5.10.253"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "5.15.203"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "6.1.168"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "6.6.134"
                                },
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                                    "vulnerable": true,
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                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "6.12.81"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "6.18.22"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "6.19.12"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "7.0"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.12.18"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13.10"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/901c1dd3bab2955d7e664f914c374c8c3ac2b958"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e476745917a1e288eb15e7ff49d286a86a4861d3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2029712fb2c87e9a8c75094906f2ee29bf08c500"
                },
                {
                    "url": "https://git.kernel.org/stable/c/602596c69a70e50d9ab8c6ae0290a01f88229dd7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/de20d2e3b9179d132f5f5b44e490d7c916c6321b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/eddfce70a6f3107d1679b0c2fcbeb96b593bd679"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b69c4236255bd8de16cd876e58c6f0867d1d78b1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/afa9a05e6c4971bd5586f1b304e14d61fb3d9385"
                }
            ],
            "title": "vxlan: validate ND option lengths in vxlan_na_create",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}