{"id":"CVE-2026-80802","revision":"dd654b5f15c74100a6d8a9e44d7c24a9","records":[{"revision":"dd654b5f15c74100a6d8a9e44d7c24a9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80802","aliases":[],"title":"nfc: fdp: bound the device-reported read length and fix an skb leak","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: fdp: bound the device-reported read length and fix an skb leak\n\nfdp_nci_i2c_read() takes the next packet length from two device-supplied\nbytes and never validates it. The value is a u16 used as the\ni2c_master_recv() count into a 261-byte on-stack buffer: a malicious,\ncounterfeit or malfunctioning controller (or an i2c bus interposer) can\ndrive it far past the buffer for a stack out-of-bounds write that\nclobbers the canary and return address, or below the minimum frame size\n(directly, or by truncating the computed sum) so the header/LRC strip\nand the next length read run past a short receive. Reject a length\noutside [FDP_NCI_I2C_MIN_PAYLOAD, FDP_NCI_I2C_MAX_PAYLOAD], as a\ncorrupted packet already is, and force resynchronization.\n\nThe same loop allocates one data skb per iteration and assumes a length\npacket followed by a data packet; a device that sends two data packets\nin one call leaks the first skb when the second allocation overwrites\nit. Free a previously allocated skb before allocating the next.","state":0,"publishedAt":"2026-09-04T15:13:16.241+00:00","modifiedAt":"2026-10-19T08:43:55.498+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/fdp/i2c.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a06347c04c13e380afce0c9816df51f00b83faf1\",\n                            \"lessThan\": \"d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a06347c04c13e380afce0c9816df51f00b83faf1\",\n                            \"lessThan\": \"1fc32327b927a6e2cde086f82575c29880844228\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a06347c04c13e380afce0c9816df51f00b83faf1\",\n                            \"lessThan\": \"8d2c243b79854628ff076c38748c020042f02f57\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a06347c04c13e380afce0c9816df51f00b83faf1\",\n                            \"lessThan\": \"fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a06347c04c13e380afce0c9816df51f00b83faf1\",\n                            \"lessThan\": \"0d723090645b82c1cb27cfd7ebf81f0e7c96bcae\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a06347c04c13e380afce0c9816df51f00b83faf1\",\n                            \"lessThan\": \"db7e464b350969c6ea8340de00d9796e5fd5123b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a06347c04c13e380afce0c9816df51f00b83faf1\",\n                            \"lessThan\": \"e5eec121f2c3bc4c7022613bedd9121a8aa4c949\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a06347c04c13e380afce0c9816df51f00b83faf1\",\n                            \"lessThan\": \"1aa3fc769b0c45bd19f8dab1697084c2b3f6d706\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a06347c04c13e380afce0c9816df51f00b83faf1\",\n                            \"lessThan\": \"7ad21dcfeb5181af0c3ee2608808c0c0a5283aa1\",\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                        \"drivers/nfc/fdp/i2c.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.4\",\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/d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee","https://git.kernel.org/stable/c/1fc32327b927a6e2cde086f82575c29880844228","https://git.kernel.org/stable/c/8d2c243b79854628ff076c38748c020042f02f57","https://git.kernel.org/stable/c/fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463","https://git.kernel.org/stable/c/0d723090645b82c1cb27cfd7ebf81f0e7c96bcae","https://git.kernel.org/stable/c/db7e464b350969c6ea8340de00d9796e5fd5123b","https://git.kernel.org/stable/c/e5eec121f2c3bc4c7022613bedd9121a8aa4c949","https://git.kernel.org/stable/c/1aa3fc769b0c45bd19f8dab1697084c2b3f6d706","https://git.kernel.org/stable/c/7ad21dcfeb5181af0c3ee2608808c0c0a5283aa1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80802","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80802","identifiers":["CVE-2026-80802"]},"retained":false,"historicalAffected":[]}],"coverage":[]}