{"id":"CVE-2026-90221","revision":"3e6ff220b1f0404a9a70b4a32ad4fc75","records":[{"revision":"3e6ff220b1f0404a9a70b4a32ad4fc75","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90221","aliases":[],"title":"nfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing\n\nnci_core_init_rsp_packet_v1() and nci_core_init_rsp_packet_v2() parse\nthe CORE_INIT_RSP packet without validating that the skb contains\nenough data. A malformed response (e.g. injected via virtual_ncidev)\ncan declare a large num_supported_rf_interfaces while providing\ninsufficient data, causing reads of uninitialized slab memory. This\nis later used in nci_init_complete_req(), triggering a KMSAN\nuninit-value warning.\n\nAdd skb length checks before accessing packet fields:\n- Validate the skb has at least 1 byte for the status field.\n- Validate the skb can hold the fixed-size header before parsing.\n- In v2, bounds-check each variable-length rf_interface entry and its\n  extension parameters within the parsing loop.\n- In v1, verify the skb is large enough for both the variable-length\n  rf_interfaces array and the trailing rsp_2 structure.","state":0,"publishedAt":"2026-09-17T16:07:32.07+00:00","modifiedAt":"2026-10-19T08:59:57.703+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/rsp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"bcd684aace34fedbd473fbd9b21ed06b0c2d2212\",\n                            \"lessThan\": \"baed3fdf6ed2195c56f25ae18a086b938dcd3983\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bcd684aace34fedbd473fbd9b21ed06b0c2d2212\",\n                            \"lessThan\": \"2f434478771a4ebdd535033561c0590bcde39753\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bcd684aace34fedbd473fbd9b21ed06b0c2d2212\",\n                            \"lessThan\": \"5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bcd684aace34fedbd473fbd9b21ed06b0c2d2212\",\n                            \"lessThan\": \"bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bcd684aace34fedbd473fbd9b21ed06b0c2d2212\",\n                            \"lessThan\": \"4f0483bbcdaccc9d4aee30df7351863334cecfa7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bcd684aace34fedbd473fbd9b21ed06b0c2d2212\",\n                            \"lessThan\": \"7d44b897bff84edcd4814899314d661ad4956a8e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bcd684aace34fedbd473fbd9b21ed06b0c2d2212\",\n                            \"lessThan\": \"d56575a2595ee1f597f39e8a1cfb67ed3501678d\",\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/rsp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.11\",\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/baed3fdf6ed2195c56f25ae18a086b938dcd3983","https://git.kernel.org/stable/c/2f434478771a4ebdd535033561c0590bcde39753","https://git.kernel.org/stable/c/5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31","https://git.kernel.org/stable/c/bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e","https://git.kernel.org/stable/c/4f0483bbcdaccc9d4aee30df7351863334cecfa7","https://git.kernel.org/stable/c/7d44b897bff84edcd4814899314d661ad4956a8e","https://git.kernel.org/stable/c/d56575a2595ee1f597f39e8a1cfb67ed3501678d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90221","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90221","identifiers":["CVE-2026-90221"]},"retained":false,"historicalAffected":[]}],"coverage":[]}