CVE-2022-48836: Input: aiptek - properly check endpoint type

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-16 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: Input: aiptek - properly check endpoint type Syzbot reported warning in usb_submit_urb() which is caused by wrong endpoint type. There was a check for the number of endpoints, but not for the type of endpoint. Fix it by replacing old desc.bNumEndpoints check with usb_find_common_endpoints() helper for finding endpoints Fail log: usb 5-1: BOGUS urb xfer, pipe 1 != type 3 WARNING: CPU: 2 PID: 48 at drivers/usb/core/urb.c:502 usb_submit_urb+0xed2/0x18a0 drivers/usb/core/urb.c:502 Modules linked in: CPU: 2 PID: 48 Comm: kworker/2:2 Not tainted 5.17.0-rc6-syzkaller-00226-g07ebd38a0da2 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Workqueue: usb_hub_wq hub_event ... Call Trace: <TASK> aiptek_open+0xd5/0x130 drivers/input/tablet/aiptek.c:830 input_open_device+0x1bb/0x320 drivers/input/input.c:629 kbd_connect+0xfe/0x160 drivers/tty/vt/keyboard.c:1593

Affected products

Linux kernel: from 4.4 before 4.9.308; from 4.10 before 4.14.273; from 4.15 before 4.19.236; from 4.20 before 5.4.187; from 5.5 before 5.10.108; from 5.11 before 5.15.31 — fixed in 4.14.273, 4.19.236, 4.9.308, 5.10.108, 5.15.31, 5.16.17

How to fix

Upgrade to a fixed version: Linux kernel 4.14.273, 4.19.236, 4.9.308, 5.10.108. Check the vendor advisory for mitigations.

References

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