Description
In the Linux kernel, the following vulnerability has been resolved: HID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler() joycon_ctlr_read_handler() casts an incoming HID input report to struct joycon_input_report and parses it, guarding the cast only with a 12-byte length check: if (size >= 12) /* make sure it contains the input report */ joycon_parse_report(ctlr, (struct joycon_input_report *)data); struct joycon_input_report is 49 bytes: a 13-byte header followed by a union whose IMU arm is 36 bytes. For an IMU report joycon_parse_report() -> joycon_parse_imu_report() walks that union (struct offsets 13..48), so a report of exactly 12 bytes with data[0] == JC_INPUT_IMU_DATA passes the guard yet is read up to 37 bytes past its declared length. The over-read bytes are decoded into accelerometer/gyroscope values and forwarded to userspace through the "(IMU)" input device, leaking driver-internal memory. data[0] and size are fully controlled by a malicious or spoofed Joy-Con/Pro Controller. Receive buffers are sized to the maximum report length, so this is an over-read within the allocation rather than a slab OOB, but the decoded bytes still reach userspace. The sibling subcmd path in joycon_ctlr_handle_event() already bounds the same cast correctly: if (size < sizeof(struct joycon_input_report) || data[0] != JC_INPUT_SUBCMD_REPLY) break; Use the same sizeof(struct joycon_input_report) bound here.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
2af16c1f846bd60240745bbd3afa13d5f040c61a to < 33ea29f8b6141f2d265de807e110a6435b355cb0affected2af16c1f846bd60240745bbd3afa13d5f040c61a to < bd397c4123a4bc084913d8c7fdb40ef94e9f8172affected2af16c1f846bd60240745bbd3afa13d5f040c61a to < addca61f9a23c0d20a387c2040e70479f54518e1affected2af16c1f846bd60240745bbd3afa13d5f040c61a to < 51cfd1adbe7a46bb08af162abb3ab3b6820e2d15affected2af16c1f846bd60240745bbd3afa13d5f040c61a to < d4cabd4089adb59cf7974915737c52cc47a9bb1baffected2af16c1f846bd60240745bbd3afa13d5f040c61a to < 34725ed4719da424113db8449fb5485aaf71a913affected2af16c1f846bd60240745bbd3afa13d5f040c61a to < 27b376b945c0aac46fcdfcc950b14a85b874b557affected
Linux Linux
Default version status: affected
5.16affected0 to < 5.16unaffected6.1.185 to ≤ 6.1.*unaffected6.6.154 to ≤ 6.6.*unaffected6.12.106 to ≤ 6.12.*unaffected6.18.47 to ≤ 6.18.*unaffected7.1.11 to ≤ 7.1.*unaffected7.2.1 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/33ea29f8b6141f2d265de807e110a6435b355cb0 ↗
- https://git.kernel.org/stable/c/bd397c4123a4bc084913d8c7fdb40ef94e9f8172 ↗
- https://git.kernel.org/stable/c/addca61f9a23c0d20a387c2040e70479f54518e1 ↗
- https://git.kernel.org/stable/c/51cfd1adbe7a46bb08af162abb3ab3b6820e2d15 ↗
- https://git.kernel.org/stable/c/d4cabd4089adb59cf7974915737c52cc47a9bb1b ↗
- https://git.kernel.org/stable/c/34725ed4719da424113db8449fb5485aaf71a913 ↗
- https://git.kernel.org/stable/c/27b376b945c0aac46fcdfcc950b14a85b874b557 ↗