{"id":"CVE-2026-80772","title":"HID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler()","summary":"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 par…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < 33ea29f8b6141f2d265de807e110a6435b355cb0","Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < bd397c4123a4bc084913d8c7fdb40ef94e9f8172","Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < addca61f9a23c0d20a387c2040e70479f54518e1","Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < 51cfd1adbe7a46bb08af162abb3ab3b6820e2d15","Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < d4cabd4089adb59cf7974915737c52cc47a9bb1b","Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < 34725ed4719da424113db8449fb5485aaf71a913","Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < 27b376b945c0aac46fcdfcc950b14a85b874b557","Linux 5.16"],"published":"2026-09-04","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:43:28.729Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80772","references":[{"url":"https://git.kernel.org/stable/c/33ea29f8b6141f2d265de807e110a6435b355cb0"},{"url":"https://git.kernel.org/stable/c/bd397c4123a4bc084913d8c7fdb40ef94e9f8172"},{"url":"https://git.kernel.org/stable/c/addca61f9a23c0d20a387c2040e70479f54518e1"},{"url":"https://git.kernel.org/stable/c/51cfd1adbe7a46bb08af162abb3ab3b6820e2d15"},{"url":"https://git.kernel.org/stable/c/d4cabd4089adb59cf7974915737c52cc47a9bb1b"},{"url":"https://git.kernel.org/stable/c/34725ed4719da424113db8449fb5485aaf71a913"},{"url":"https://git.kernel.org/stable/c/27b376b945c0aac46fcdfcc950b14a85b874b557"}],"tags":["cve.org"],"epss":0.00215,"epssPercentile":0.11049,"ingestedAt":"2026-10-19T10:20:54.954Z","slug":"CVE-2026-80772","body":"## Overview\n\nIn 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 >= 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-> 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 < 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.\n\n## Affected\n\n- `Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < 33ea29f8b6141f2d265de807e110a6435b355cb0`\n- `Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < bd397c4123a4bc084913d8c7fdb40ef94e9f8172`\n- `Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < addca61f9a23c0d20a387c2040e70479f54518e1`\n- `Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < 51cfd1adbe7a46bb08af162abb3ab3b6820e2d15`\n- `Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < d4cabd4089adb59cf7974915737c52cc47a9bb1b`\n- `Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < 34725ed4719da424113db8449fb5485aaf71a913`\n- `Linux >= 2af16c1f846bd60240745bbd3afa13d5f040c61a < 27b376b945c0aac46fcdfcc950b14a85b874b557`\n- `Linux 5.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}