{"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": "2026-10-18T15:17:44.018Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-18T15:17:44.018Z"}, "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-rc5", "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-rc5"}]}]}], "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", "x_generator": {"engine": "bippy-1.2.0"}}}}

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