{"id":"CVE-2026-98526","title":"llc: reserve device headroom for allocated frames","summary":"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 devic…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 018020f5a48cc86fdd6dc2d380f6c70443ae7639","Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1","Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 7c38524b2b2456bd33cb360420da6cbf9cad1b33","Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 1937222c2511ac91377d39f28106c34734f5f8c6","Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 16ceac2daa89dd16917bc488ab05b9dd6961a603","Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < e06f8b6e27cc616d3c587e9784c4a033eb310a16","Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 3361c93e417384ebf28003e0fb6d5304653d3b05","Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 72b5b9a28b996e09b8b5b944370c79851bb68f52","Linux 2.6.34"],"published":"2026-10-18","updated":"2026-10-19","sourceUpdated":"2026-10-19T09:21:07.983Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98526","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"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.280Z","slug":"CVE-2026-98526","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 018020f5a48cc86fdd6dc2d380f6c70443ae7639`\n- `Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1`\n- `Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 7c38524b2b2456bd33cb360420da6cbf9cad1b33`\n- `Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 1937222c2511ac91377d39f28106c34734f5f8c6`\n- `Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 16ceac2daa89dd16917bc488ab05b9dd6961a603`\n- `Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < e06f8b6e27cc616d3c587e9784c4a033eb310a16`\n- `Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 3361c93e417384ebf28003e0fb6d5304653d3b05`\n- `Linux >= bf9ae5386bca8836c16e69ab8fdbe46767d7452a < 72b5b9a28b996e09b8b5b944370c79851bb68f52`\n- `Linux 2.6.34`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}