{"id":"CVE-2026-80795","revision":"68543398e49d4f9e8fd3d71ea0ce783d","records":[{"revision":"68543398e49d4f9e8fd3d71ea0ce783d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80795","aliases":[],"title":"nfc: nci: fix out-of-bounds write in nci_target_auto_activated()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix out-of-bounds write in nci_target_auto_activated()\n\nnci_target_auto_activated() appends a target to the fixed-size array\nndev->targets[NCI_MAX_DISCOVERED_TARGETS] and increments ndev->n_targets\nwithout first checking the array is full; unlike its sibling\nnci_add_new_target(), which bails out when n_targets already equals\nNCI_MAX_DISCOVERED_TARGETS.\n\nndev->n_targets is only cleared by nci_clear_target_list(), so an NFCC\nthat repeatedly re-runs discovery (RF_DISCOVER_RSP, which re-enters\nNCI_DISCOVERY without clearing the target list) and reports an\nauto-activated target (RF_INTF_ACTIVATED_NTF) drives n_targets past the\nlimit. The append then writes a struct nfc_target past the end of the\narray (a slab out-of-bounds write), and nfc_targets_found() goes on to\nwalk the array with the inflated count:\n\n  BUG: KASAN: slab-out-of-bounds in nci_add_new_protocol+0x94/0x2ac [nci]\n  Write of size 2 at addr ffff0000c7299a18 by task kworker/u8:0/12\n  Workqueue: nfc0_nci_rx_wq nci_rx_work [nci]\n  Call trace:\n   nci_add_new_protocol+0x94/0x2ac [nci]\n   nci_ntf_packet+0xddc/0x11a0 [nci]\n   nci_rx_work+0x15c/0x1e0 [nci]\n   process_one_work+0x2dc/0x500\n   worker_thread+0x240/0x460\n   kthread+0x1c0/0x1d0\n   ret_from_fork+0x10/0x20\n\n  The buggy address belongs to the cache kmalloc-2k of size 2048\n  The buggy address is located 1024 bytes to the right of\n  allocated 1560-byte region [ffff0000c7299000, ffff0000c7299618)\n\nGuard nci_target_auto_activated() with the same check used by\nnci_add_new_target().","state":0,"publishedAt":"2026-09-04T15:13:08.64+00:00","modifiedAt":"2026-10-19T08:43:48.491+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\": \"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5\",\n                            \"lessThan\": \"0dc59de0075f88404a0f4a2b5233104ef459fbb2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5\",\n                            \"lessThan\": \"94530ffabfca57e9bff1d207106010014cc84032\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5\",\n                            \"lessThan\": \"afd8605fb43becb892311102844955c3b127fc7e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5\",\n                            \"lessThan\": \"24761d3a5f692df5f7d848caeabcb2afd10917aa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5\",\n                            \"lessThan\": \"50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5\",\n                            \"lessThan\": \"2f08dbce3b37624ec6b424d759336a99586170ec\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5\",\n                            \"lessThan\": \"d7083f41c21b30582e91b2e6de4d54dce74f6f9c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5\",\n                            \"lessThan\": \"129032c0616d83a5e3e304f6ebf88f14ba01e5f7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5\",\n                            \"lessThan\": \"ac200079db50af81e6b04d058b33ec92901d8edd\",\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\": \"3.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.267\",\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/0dc59de0075f88404a0f4a2b5233104ef459fbb2","https://git.kernel.org/stable/c/94530ffabfca57e9bff1d207106010014cc84032","https://git.kernel.org/stable/c/afd8605fb43becb892311102844955c3b127fc7e","https://git.kernel.org/stable/c/24761d3a5f692df5f7d848caeabcb2afd10917aa","https://git.kernel.org/stable/c/50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951","https://git.kernel.org/stable/c/2f08dbce3b37624ec6b424d759336a99586170ec","https://git.kernel.org/stable/c/d7083f41c21b30582e91b2e6de4d54dce74f6f9c","https://git.kernel.org/stable/c/129032c0616d83a5e3e304f6ebf88f14ba01e5f7","https://git.kernel.org/stable/c/ac200079db50af81e6b04d058b33ec92901d8edd"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80795","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80795","identifiers":["CVE-2026-80795"]},"retained":false,"historicalAffected":[]}],"coverage":[]}