{"id":"CVE-2026-90226","revision":"a4ae140347e04ed997a3d947303728c1","records":[{"revision":"a4ae140347e04ed997a3d947303728c1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90226","aliases":[],"title":"nfc: llcp: avoid userspace overflow on invalid optlen","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: avoid userspace overflow on invalid optlen\n\nnfc_llcp_getsockopt() casts optval to (u32 __user *) for put_user(), so\nthe kernel always stores 4 bytes regardless of the caller-supplied\noptlen. The existing min_t(u32, len, sizeof(u32)) only clamps the length\nreported back to userspace; it does not constrain the store. A call with\noptlen < 4 therefore writes past the user buffer, violating the\ngetsockopt(2) contract for all five supported optnames.\n\nReject any call with optlen < sizeof(u32) up front. 'len' is int, so a\nplain size comparison would promote a negative optlen to size_t and slip\npast the check; an explicit 'len < 0' test is added first to catch\nnegative values before the size compare.","state":0,"publishedAt":"2026-09-17T16:07:35.322+00:00","modifiedAt":"2026-10-19T09:00:02.755+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_sock.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"26fd76cab2e61cedc5c25f7151fb31b57ddc53c7\",\n                            \"lessThan\": \"42859562b7cc4313a84a584f338118edb7087066\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"26fd76cab2e61cedc5c25f7151fb31b57ddc53c7\",\n                            \"lessThan\": \"598dcd53c52f8eeb9dd5382198c03960d5d40fcd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"26fd76cab2e61cedc5c25f7151fb31b57ddc53c7\",\n                            \"lessThan\": \"7e40f2f5e7bc06c3ddef781180ce4f7994176547\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"26fd76cab2e61cedc5c25f7151fb31b57ddc53c7\",\n                            \"lessThan\": \"35573c6cb081af2f4a7caeea291302aca5484526\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"26fd76cab2e61cedc5c25f7151fb31b57ddc53c7\",\n                            \"lessThan\": \"b4c5abaea06292e1dddb70eac1b51589b32c77a3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"26fd76cab2e61cedc5c25f7151fb31b57ddc53c7\",\n                            \"lessThan\": \"8bf228fa02b1ed8ce622fb81fa8edc42be9aeb67\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"26fd76cab2e61cedc5c25f7151fb31b57ddc53c7\",\n                            \"lessThan\": \"bd6f1277b62bc1df348ca21739df2bc546fcd493\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"26fd76cab2e61cedc5c25f7151fb31b57ddc53c7\",\n                            \"lessThan\": \"99985bfa8336fadcc69190ba2dcbd5386af3d661\",\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_sock.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.10\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.10\",\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":[],"references":["https://git.kernel.org/stable/c/42859562b7cc4313a84a584f338118edb7087066","https://git.kernel.org/stable/c/598dcd53c52f8eeb9dd5382198c03960d5d40fcd","https://git.kernel.org/stable/c/7e40f2f5e7bc06c3ddef781180ce4f7994176547","https://git.kernel.org/stable/c/35573c6cb081af2f4a7caeea291302aca5484526","https://git.kernel.org/stable/c/b4c5abaea06292e1dddb70eac1b51589b32c77a3","https://git.kernel.org/stable/c/8bf228fa02b1ed8ce622fb81fa8edc42be9aeb67","https://git.kernel.org/stable/c/bd6f1277b62bc1df348ca21739df2bc546fcd493","https://git.kernel.org/stable/c/99985bfa8336fadcc69190ba2dcbd5386af3d661"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90226","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90226","identifiers":["CVE-2026-90226"]},"retained":false,"historicalAffected":[]}],"coverage":[]}