{"id":"CVE-2026-90223","revision":"ca1a47b9401c46b6a85dd02410187231","records":[{"revision":"ca1a47b9401c46b6a85dd02410187231","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90223","aliases":[],"title":"nfc: llcp: bound SNL TLV parsing to the skb and add length checks","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: bound SNL TLV parsing to the skb and add length checks\n\nnfc_llcp_recv_snl() walked the SNL TLV list using a u16 offset/length\npair derived from skb->len, without bounding reads to the actual skb\ndata. Three problems followed:\n\n  - For a short frame (skb->len < LLCP_HEADER_SIZE), tlv_len underflowed.\n  - The per-TLV header (type, length) was read without checking that two\n    bytes remained.\n  - A declared TLV length could run past the end of the buffer, and an\n    SDREQ with length == 0 made \"service_name_len = length - 1\" underflow\n    (size_t), driving an out-of-bounds read in the following strncmp() /\n    nfc_llcp_sock_from_sn(). The SDRES case likewise read tlv[2]/tlv[3]\n    without a length check.\n\nA nearby NFC device can reach this without authentication; LLCP link\nactivation happens automatically after NFC-DEP.\n\nWalk the TLV list by pointer, bounded by skb_tail_pointer() over the\nlinear skb data, and validate each TLV declared length before use. Add\nexplicit length checks for SDREQ (>= 1) and SDRES (exactly 2).\n\nFound by 0sec automated security-research tooling (https://0sec.ai).","state":0,"publishedAt":"2026-09-17T16:07:33.355+00:00","modifiedAt":"2026-10-19T08:59:59.669+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/nfc/llcp_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"19cfe5843e86cc95542d9d875c9386e197956d75\",\n                            \"lessThan\": \"88b36d36e12c9ba76decdb580d9c1907c084e587\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"19cfe5843e86cc95542d9d875c9386e197956d75\",\n                            \"lessThan\": \"587fc2a5a35b41883b22b8f808fe5d345208914b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"19cfe5843e86cc95542d9d875c9386e197956d75\",\n                            \"lessThan\": \"f04ac9bf2379f3e2470c400c235eb12f74891bef\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"19cfe5843e86cc95542d9d875c9386e197956d75\",\n                            \"lessThan\": \"02030f95820c42431280f4f945ff34247fb840ff\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"19cfe5843e86cc95542d9d875c9386e197956d75\",\n                            \"lessThan\": \"99fdb5c2522f365efa199d0117b641e35097041e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"19cfe5843e86cc95542d9d875c9386e197956d75\",\n                            \"lessThan\": \"749a9048bf51a668ec3ab6c0392ba32325607281\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"19cfe5843e86cc95542d9d875c9386e197956d75\",\n                            \"lessThan\": \"eeb16fb24cfe67947b832fd9ada5f488afc72579\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"19cfe5843e86cc95542d9d875c9386e197956d75\",\n                            \"lessThan\": \"f4c7f37f0ab990952539dc68d931d65c3657600a\",\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/nfc/llcp_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\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":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/88b36d36e12c9ba76decdb580d9c1907c084e587","https://git.kernel.org/stable/c/587fc2a5a35b41883b22b8f808fe5d345208914b","https://git.kernel.org/stable/c/f04ac9bf2379f3e2470c400c235eb12f74891bef","https://git.kernel.org/stable/c/02030f95820c42431280f4f945ff34247fb840ff","https://git.kernel.org/stable/c/99fdb5c2522f365efa199d0117b641e35097041e","https://git.kernel.org/stable/c/749a9048bf51a668ec3ab6c0392ba32325607281","https://git.kernel.org/stable/c/eeb16fb24cfe67947b832fd9ada5f488afc72579","https://git.kernel.org/stable/c/f4c7f37f0ab990952539dc68d931d65c3657600a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90223","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90223","identifiers":["CVE-2026-90223"]},"retained":false,"historicalAffected":[]}],"coverage":[]}