{"id":"CVE-2026-80794","revision":"56b0409237a84a05b946db55bbb8035f","records":[{"revision":"56b0409237a84a05b946db55bbb8035f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80794","aliases":[],"title":"nfc: nci: fix uninit-value in the RF discover/activated NTF handlers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix uninit-value in the RF discover/activated NTF handlers\n\nnci_rf_discover_ntf_packet() and nci_rf_intf_activated_ntf_packet() each\nparse a notification into an on-stack struct (nci_rf_discover_ntf /\nnci_rf_intf_activated_ntf) that is not initialised. The RF\ntechnology-specific parameters are only extracted when\nrf_tech_specific_params_len is non-zero, so a notification that reports a\nzero length leaves the rf_tech_specific_params union uninitialised - and\nboth handlers then pass it to nci_add_new_protocol(), which reads it:\n\n - discover:  nci_add_new_target() -> nci_add_new_protocol();\n - activated: nci_target_auto_activated() -> nci_add_new_protocol().\n\nnci_add_new_protocol() uses nfca_poll->nfcid1_len as both a branch\ncondition and a memcpy() length and copies nfcid1/sens_res/sel_res into\nndev->targets, which is later exposed to user space via NFC_CMD_GET_TARGET.\n\n  BUG: KMSAN: uninit-value in nci_add_new_protocol+0x624/0x6c0\n   nci_add_new_protocol+0x624/0x6c0\n   nci_ntf_packet+0x25b2/0x3c30\n   nci_rx_work+0x318/0x5d0\n   process_scheduled_works+0x84b/0x17a0\n   worker_thread+0xc10/0x11b0\n   kthread+0x376/0x500\n  Local variable ntf.i created at:\n   nci_ntf_packet+0xbc2/0x3c30\n\nZero-initialise both on-stack notifications so the union reads back as\nzero when no technology-specific parameters are present.","state":0,"publishedAt":"2026-09-04T15:13:07.169+00:00","modifiedAt":"2026-10-19T08:43:47.481+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/nci/ntf.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20\",\n                            \"lessThan\": \"1007a6b429d756513abd25bd00290908f2e89a4a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20\",\n                            \"lessThan\": \"4bda9ef8392710f21e99027467f3f4afdfb5c99a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20\",\n                            \"lessThan\": \"fe69fed3495f676578d49414a069ad7d8468e2ce\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20\",\n                            \"lessThan\": \"7489f59d1ea2d3298aa41de7baf193e5e6e132f6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20\",\n                            \"lessThan\": \"7086dab72b3ed95df96842801e10e935cfeb27a3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20\",\n                            \"lessThan\": \"0d4b5cfab6891a5ca0f6aef209beebba4bd7c095\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20\",\n                            \"lessThan\": \"5bd00c0e1470d90d77a7c60242854257ddf14e00\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20\",\n                            \"lessThan\": \"d6f743d3d388913135681cde051c08823730194f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20\",\n                            \"lessThan\": \"8cbe06c1e699c0a165dae5093a2550e65f914818\",\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/nci/ntf.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\": \"5.10.269\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.218\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.185\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.154\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.106\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.47\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.11\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.1\",\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/1007a6b429d756513abd25bd00290908f2e89a4a","https://git.kernel.org/stable/c/4bda9ef8392710f21e99027467f3f4afdfb5c99a","https://git.kernel.org/stable/c/fe69fed3495f676578d49414a069ad7d8468e2ce","https://git.kernel.org/stable/c/7489f59d1ea2d3298aa41de7baf193e5e6e132f6","https://git.kernel.org/stable/c/7086dab72b3ed95df96842801e10e935cfeb27a3","https://git.kernel.org/stable/c/0d4b5cfab6891a5ca0f6aef209beebba4bd7c095","https://git.kernel.org/stable/c/5bd00c0e1470d90d77a7c60242854257ddf14e00","https://git.kernel.org/stable/c/d6f743d3d388913135681cde051c08823730194f","https://git.kernel.org/stable/c/8cbe06c1e699c0a165dae5093a2550e65f914818"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80794","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80794","identifiers":["CVE-2026-80794"]},"retained":false,"historicalAffected":[]}],"coverage":[]}