{"id":"CVE-2026-98526","revision":"ac358ab2181247c49935d518320a0d92","records":[{"revision":"ac358ab2181247c49935d518320a0d92","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98526","aliases":[],"title":"llc: reserve device headroom for allocated frames","description":"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.","state":0,"publishedAt":"2026-10-18T15:17:44.018+00:00","modifiedAt":"2026-10-19T09:21:07.983+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/llc/llc_sap.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"bf9ae5386bca8836c16e69ab8fdbe46767d7452a\",\n                            \"lessThan\": \"018020f5a48cc86fdd6dc2d380f6c70443ae7639\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bf9ae5386bca8836c16e69ab8fdbe46767d7452a\",\n                            \"lessThan\": \"3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bf9ae5386bca8836c16e69ab8fdbe46767d7452a\",\n                            \"lessThan\": \"7c38524b2b2456bd33cb360420da6cbf9cad1b33\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bf9ae5386bca8836c16e69ab8fdbe46767d7452a\",\n                            \"lessThan\": \"1937222c2511ac91377d39f28106c34734f5f8c6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bf9ae5386bca8836c16e69ab8fdbe46767d7452a\",\n                            \"lessThan\": \"16ceac2daa89dd16917bc488ab05b9dd6961a603\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bf9ae5386bca8836c16e69ab8fdbe46767d7452a\",\n                            \"lessThan\": \"e06f8b6e27cc616d3c587e9784c4a033eb310a16\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bf9ae5386bca8836c16e69ab8fdbe46767d7452a\",\n                            \"lessThan\": \"3361c93e417384ebf28003e0fb6d5304653d3b05\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bf9ae5386bca8836c16e69ab8fdbe46767d7452a\",\n                            \"lessThan\": \"72b5b9a28b996e09b8b5b944370c79851bb68f52\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/llc/llc_sap.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.34\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.34\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.55\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.9\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/018020f5a48cc86fdd6dc2d380f6c70443ae7639","https://git.kernel.org/stable/c/3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1","https://git.kernel.org/stable/c/7c38524b2b2456bd33cb360420da6cbf9cad1b33","https://git.kernel.org/stable/c/1937222c2511ac91377d39f28106c34734f5f8c6","https://git.kernel.org/stable/c/16ceac2daa89dd16917bc488ab05b9dd6961a603","https://git.kernel.org/stable/c/e06f8b6e27cc616d3c587e9784c4a033eb310a16","https://git.kernel.org/stable/c/3361c93e417384ebf28003e0fb6d5304653d3b05","https://git.kernel.org/stable/c/72b5b9a28b996e09b8b5b944370c79851bb68f52"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98526","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98526","identifiers":["CVE-2026-98526"]},"retained":false,"historicalAffected":[]}],"coverage":[]}