{"id":"CVE-2026-98526","summary":"llc: reserve device headroom for allocated frames","details":"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.","modified":"2026-10-19T02:46:28.450454281Z","published":"2026-10-18T15:17:44.018Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98526.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/018020f5a48cc86fdd6dc2d380f6c70443ae7639"},{"type":"WEB","url":"https://git.kernel.org/stable/c/16ceac2daa89dd16917bc488ab05b9dd6961a603"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1937222c2511ac91377d39f28106c34734f5f8c6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3361c93e417384ebf28003e0fb6d5304653d3b05"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/72b5b9a28b996e09b8b5b944370c79851bb68f52"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7c38524b2b2456bd33cb360420da6cbf9cad1b33"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e06f8b6e27cc616d3c587e9784c4a033eb310a16"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98526.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98526"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bf9ae5386bca8836c16e69ab8fdbe46767d7452a"},{"fixed":"018020f5a48cc86fdd6dc2d380f6c70443ae7639"},{"fixed":"3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1"},{"fixed":"7c38524b2b2456bd33cb360420da6cbf9cad1b33"},{"fixed":"1937222c2511ac91377d39f28106c34734f5f8c6"},{"fixed":"16ceac2daa89dd16917bc488ab05b9dd6961a603"},{"fixed":"e06f8b6e27cc616d3c587e9784c4a033eb310a16"},{"fixed":"3361c93e417384ebf28003e0fb6d5304653d3b05"},{"fixed":"72b5b9a28b996e09b8b5b944370c79851bb68f52"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98526.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.34"},{"fixed":"5.10.271"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.222"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.189"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.158"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.112"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.55"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98526.json"}}],"schema_version":"1.9.0"}