{"id":"CVE-2026-80772","summary":"HID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler()\n\njoycon_ctlr_read_handler() casts an incoming HID input report to\nstruct joycon_input_report and parses it, guarding the cast only with a\n12-byte length check:\n\n\tif (size \u003e= 12) /* make sure it contains the input report */\n\t\tjoycon_parse_report(ctlr, (struct joycon_input_report *)data);\n\nstruct joycon_input_report is 49 bytes: a 13-byte header followed by a\nunion whose IMU arm is 36 bytes. For an IMU report joycon_parse_report()\n-\u003e joycon_parse_imu_report() walks that union (struct offsets 13..48),\nso a report of exactly 12 bytes with data[0] == JC_INPUT_IMU_DATA passes\nthe guard yet is read up to 37 bytes past its declared length. The\nover-read bytes are decoded into accelerometer/gyroscope values and\nforwarded to userspace through the \"(IMU)\" input device, leaking\ndriver-internal memory. data[0] and size are fully controlled by a\nmalicious or spoofed Joy-Con/Pro Controller.\n\nReceive buffers are sized to the maximum report length, so this is an\nover-read within the allocation rather than a slab OOB, but the decoded\nbytes still reach userspace.\n\nThe sibling subcmd path in joycon_ctlr_handle_event() already bounds the\nsame cast correctly:\n\n\tif (size \u003c sizeof(struct joycon_input_report) ||\n\t    data[0] != JC_INPUT_SUBCMD_REPLY)\n\t\tbreak;\n\nUse the same sizeof(struct joycon_input_report) bound here.","modified":"2026-09-06T03:46:43.548111309Z","published":"2026-09-04T15:12:44.445Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80772.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/27b376b945c0aac46fcdfcc950b14a85b874b557"},{"type":"WEB","url":"https://git.kernel.org/stable/c/33ea29f8b6141f2d265de807e110a6435b355cb0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/34725ed4719da424113db8449fb5485aaf71a913"},{"type":"WEB","url":"https://git.kernel.org/stable/c/51cfd1adbe7a46bb08af162abb3ab3b6820e2d15"},{"type":"WEB","url":"https://git.kernel.org/stable/c/addca61f9a23c0d20a387c2040e70479f54518e1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bd397c4123a4bc084913d8c7fdb40ef94e9f8172"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d4cabd4089adb59cf7974915737c52cc47a9bb1b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80772.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80772"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2af16c1f846bd60240745bbd3afa13d5f040c61a"},{"fixed":"33ea29f8b6141f2d265de807e110a6435b355cb0"},{"fixed":"bd397c4123a4bc084913d8c7fdb40ef94e9f8172"},{"fixed":"addca61f9a23c0d20a387c2040e70479f54518e1"},{"fixed":"51cfd1adbe7a46bb08af162abb3ab3b6820e2d15"},{"fixed":"d4cabd4089adb59cf7974915737c52cc47a9bb1b"},{"fixed":"34725ed4719da424113db8449fb5485aaf71a913"},{"fixed":"27b376b945c0aac46fcdfcc950b14a85b874b557"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80772.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.185"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.154"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.106"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.47"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.11"}]},{"type":"ECOSYSTEM","events":[{"introduced":"7.2.0"},{"fixed":"7.2.1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80772.json"}}],"schema_version":"1.9.0"}