{"id":"CVE-2026-98483","revision":"7bca3b7a63f040e9ae044fa561d1249c","records":[{"revision":"7bca3b7a63f040e9ae044fa561d1249c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98483","aliases":[],"title":"nfc: fix use-after-free in nfc_get_local_general_bytes","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: fix use-after-free in nfc_get_local_general_bytes\n\nCommit 6709d4b7bc2e (\"net: nfc: Fix use-after-free caused by\nnfc_llcp_find_local\") attempted to fix a use-after-free (UAF) issue by\ninvoking nfc_llcp_local_put(local) after accessing local->gb. However,\nif the reference count drops to zero, local is freed immediately,\nleading to a use-after-free when callers access the returned pointer.\nAlternative approaches using dynamic allocation (e.g. kmemdup) introduced\nmemory leaks because callers consistently treat the returned pointer as\nborrowed memory.\n\nFix this properly by refactoring nfc_llcp_general_bytes() and\nnfc_get_local_general_bytes() to accept a caller-provided output buffer\n(out_gb) and its maximum length (gb_max_len). The general bytes are\nsafely copied into out_gb before calling nfc_llcp_local_put(local),\nensuring safe lifetime management without ownership transfer complications.\n\nUpdate all callers across drivers (microread, pn533, pn544, st21nfca,\ndigital_dep, and nci) to provide their own destination buffers and pass\nthem to nfc_get_local_general_bytes().","state":0,"publishedAt":"2026-10-18T15:15:57.275+00:00","modifiedAt":"2026-10-19T09:20:20.665+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                        \"drivers/nfc/microread/microread.c\",\n                        \"drivers/nfc/pn533/pn533.c\",\n                        \"drivers/nfc/pn533/pn533.h\",\n                        \"drivers/nfc/pn544/pn544.c\",\n                        \"drivers/nfc/st21nfca/core.c\",\n                        \"include/net/nfc/hci.h\",\n                        \"include/net/nfc/nfc.h\",\n                        \"net/nfc/core.c\",\n                        \"net/nfc/digital_dep.c\",\n                        \"net/nfc/llcp_core.c\",\n                        \"net/nfc/nci/core.c\",\n                        \"net/nfc/nfc.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"96f2c6f272ec04083d828de46285a7d7b17d1aad\",\n                            \"lessThan\": \"25bfa673adc70189c0bc872940421ae59f789cf6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"fc8429f8d86801f092fbfbd257c3af821ac0dcd3\",\n                            \"lessThan\": \"2b31d0cc95856c856ada91f943fb14dfdf29a923\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"425d9d3a92df7d96b3cfb7ee5c240293a21cbde3\",\n                            \"lessThan\": \"c40f61a6a413f3eaf028e5fe367fd9749e503ab0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6709d4b7bc2e079241fdef15d1160581c5261c10\",\n                            \"lessThan\": \"19bcfc2a56d0b82919079b5424c5a9a0ac897dcf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6709d4b7bc2e079241fdef15d1160581c5261c10\",\n                            \"lessThan\": \"d8c929e9afdbc33b1876ecb97a517e850449b5bd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6709d4b7bc2e079241fdef15d1160581c5261c10\",\n                            \"lessThan\": \"841af260ff477f6191872bc3b2e15488615c1827\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6709d4b7bc2e079241fdef15d1160581c5261c10\",\n                            \"lessThan\": \"9ede11e12f965ace97c4e0f606667f24fb41e7e1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6709d4b7bc2e079241fdef15d1160581c5261c10\",\n                            \"lessThan\": \"dcab71a7011918f6fdba7adcec02d217dcb84b8d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dd6ff3f3862709ab1a12566e73b9d6a9b8f6e548\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b3ad46e155a6d91b36c6e892019a43e3ef3c696d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e5207c1d69b1a9707615ab6ff9376e59fc096815\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.10.188\",\n                            \"lessThan\": \"5.10.271\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.121\",\n                            \"lessThan\": \"5.15.222\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.39\",\n                            \"lessThan\": \"6.1.189\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.251\",\n                            \"lessThan\": \"5.5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.3.13\",\n                            \"lessThan\": \"6.4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.4.4\",\n                            \"lessThan\": \"6.5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\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                        \"drivers/nfc/microread/microread.c\",\n                        \"drivers/nfc/pn533/pn533.c\",\n                        \"drivers/nfc/pn533/pn533.h\",\n                        \"drivers/nfc/pn544/pn544.c\",\n                        \"drivers/nfc/st21nfca/core.c\",\n                        \"include/net/nfc/hci.h\",\n                        \"include/net/nfc/nfc.h\",\n                        \"net/nfc/core.c\",\n                        \"net/nfc/digital_dep.c\",\n                        \"net/nfc/llcp_core.c\",\n                        \"net/nfc/nci/core.c\",\n                        \"net/nfc/nfc.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.5\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.5\",\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/25bfa673adc70189c0bc872940421ae59f789cf6","https://git.kernel.org/stable/c/2b31d0cc95856c856ada91f943fb14dfdf29a923","https://git.kernel.org/stable/c/c40f61a6a413f3eaf028e5fe367fd9749e503ab0","https://git.kernel.org/stable/c/19bcfc2a56d0b82919079b5424c5a9a0ac897dcf","https://git.kernel.org/stable/c/d8c929e9afdbc33b1876ecb97a517e850449b5bd","https://git.kernel.org/stable/c/841af260ff477f6191872bc3b2e15488615c1827","https://git.kernel.org/stable/c/9ede11e12f965ace97c4e0f606667f24fb41e7e1","https://git.kernel.org/stable/c/dcab71a7011918f6fdba7adcec02d217dcb84b8d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98483","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98483","identifiers":["CVE-2026-98483"]},"retained":false,"historicalAffected":[]}],"coverage":[]}