{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98526",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.355Z",
        "datePublished": "2026-10-18T15:17:44.018Z",
        "dateUpdated": "2026-10-19T09:21:07.983Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:21:07.983Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nllc: reserve device headroom for allocated frames\n\nllc_alloc_frame() reserves link-layer headroom using the device type.\nThis is insufficient for stacked Ethernet devices such as VLAN devices,\nwhere vlan_dev_hard_header() pushes a VLAN header before the lower\ndevice's Ethernet header. An LLC response on such a device can\ntherefore underflow skb headroom in eth_header().\n\nUse LL_RESERVED_SPACE() to account for the device's actual required\nheadroom while preserving the existing LLC device-type check."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/llc/llc_sap.c"
                    ],
                    "versions": [
                        {
                            "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
                            "lessThan": "018020f5a48cc86fdd6dc2d380f6c70443ae7639",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
                            "lessThan": "3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
                            "lessThan": "7c38524b2b2456bd33cb360420da6cbf9cad1b33",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
                            "lessThan": "1937222c2511ac91377d39f28106c34734f5f8c6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
                            "lessThan": "16ceac2daa89dd16917bc488ab05b9dd6961a603",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
                            "lessThan": "e06f8b6e27cc616d3c587e9784c4a033eb310a16",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
                            "lessThan": "3361c93e417384ebf28003e0fb6d5304653d3b05",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
                            "lessThan": "72b5b9a28b996e09b8b5b944370c79851bb68f52",
                            "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/llc/llc_sap.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.34",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.34",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.112",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.55",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.9",
                            "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": "2.6.34",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.34",
                                    "versionEndExcluding": "5.15.222"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.34",
                                    "versionEndExcluding": "6.1.189"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.34",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.34",
                                    "versionEndExcluding": "6.12.112"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.34",
                                    "versionEndExcluding": "6.18.55"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.34",
                                    "versionEndExcluding": "7.2.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.34",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/018020f5a48cc86fdd6dc2d380f6c70443ae7639"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7c38524b2b2456bd33cb360420da6cbf9cad1b33"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1937222c2511ac91377d39f28106c34734f5f8c6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/16ceac2daa89dd16917bc488ab05b9dd6961a603"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e06f8b6e27cc616d3c587e9784c4a033eb310a16"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3361c93e417384ebf28003e0fb6d5304653d3b05"
                },
                {
                    "url": "https://git.kernel.org/stable/c/72b5b9a28b996e09b8b5b944370c79851bb68f52"
                }
            ],
            "title": "llc: reserve device headroom for allocated frames",
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                "engine": "bippy-1.2.0"
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    }
}