{"id":"CVE-2026-98482","revision":"320f04d766174f51b3527a7faa2af26d","records":[{"revision":"320f04d766174f51b3527a7faa2af26d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98482","aliases":[],"title":"nfc: llcp: drop truncated I/RR/RNR PDUs in nfc_llcp_recv_hdlc()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: drop truncated I/RR/RNR PDUs in nfc_llcp_recv_hdlc()\n\nnfc_llcp_recv_hdlc() reads the sequence byte skb->data[2], via\nnfc_llcp_ns()/nfc_llcp_nr(), before any length check. The receive path\nonly guarantees the two-byte LLCP header -- __nfc_llcp_recv() checks it\nwith pskb_may_pull() and nfc_llcp_recv_agf() admits two-byte inner PDUs\n-- so a two-byte I, RR or RNR PDU reads one byte of uninitialised skb\ntailroom. The byte becomes N(R)/N(S); a peer can already set those with\na well-formed PDU, so this is acting on uninitialised memory, not new\npeer control.\n\nGuard the read with pskb_may_pull(), as commit 95674f506c63 (\"nfc: llcp:\nreject PDUs shorter than the LLCP header\") did for the two-byte header,\nso the sequence byte is present and linear before it is read. RR and RNR\nPDUs are LLCP_HEADER_SIZE + LLCP_SEQUENCE_SIZE bytes and an I PDU is\nlonger, so no valid frame is rejected; a truncated PDU is malformed, so\nreturn without a DM reply.","state":0,"publishedAt":"2026-10-18T15:15:56.227+00:00","modifiedAt":"2026-10-19T09:20:19.712+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\": \"d646960f7986fefb460a2b062d5ccc8ccfeacc3a\",\n                            \"lessThan\": \"3afdbebfee2ef7e9510880868cfb482cbffe6836\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d646960f7986fefb460a2b062d5ccc8ccfeacc3a\",\n                            \"lessThan\": \"9b4086eb67a9a3b1ce69fef1b6793827363703ce\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d646960f7986fefb460a2b062d5ccc8ccfeacc3a\",\n                            \"lessThan\": \"51b6d73373589abb9de4d84767b0db1bc8d395d9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d646960f7986fefb460a2b062d5ccc8ccfeacc3a\",\n                            \"lessThan\": \"066205553a0106565bcede934f5721c25ebd6e4e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d646960f7986fefb460a2b062d5ccc8ccfeacc3a\",\n                            \"lessThan\": \"18f60ee882403d5b48097f5f6ae45f794e4cc643\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d646960f7986fefb460a2b062d5ccc8ccfeacc3a\",\n                            \"lessThan\": \"810f204ef8f61f0c930cf6b3280050b3ee6a8ae7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d646960f7986fefb460a2b062d5ccc8ccfeacc3a\",\n                            \"lessThan\": \"744e61bd06188d8bb068c26a461c252f242b05c9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d646960f7986fefb460a2b062d5ccc8ccfeacc3a\",\n                            \"lessThan\": \"273f9d667cde649f8de9d72b1303cc2f4b658c50\",\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\": \"3.3\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.3\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.55\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.9\",\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/3afdbebfee2ef7e9510880868cfb482cbffe6836","https://git.kernel.org/stable/c/9b4086eb67a9a3b1ce69fef1b6793827363703ce","https://git.kernel.org/stable/c/51b6d73373589abb9de4d84767b0db1bc8d395d9","https://git.kernel.org/stable/c/066205553a0106565bcede934f5721c25ebd6e4e","https://git.kernel.org/stable/c/18f60ee882403d5b48097f5f6ae45f794e4cc643","https://git.kernel.org/stable/c/810f204ef8f61f0c930cf6b3280050b3ee6a8ae7","https://git.kernel.org/stable/c/744e61bd06188d8bb068c26a461c252f242b05c9","https://git.kernel.org/stable/c/273f9d667cde649f8de9d72b1303cc2f4b658c50"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98482","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98482","identifiers":["CVE-2026-98482"]},"retained":false,"historicalAffected":[]}],"coverage":[]}