CVE-2022-50156 Information

Jun 19, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

HID: cp2112: prevent a buffer overflow in cp2112_xfer()

Smatch warnings: drivers/hid/hid-cp2112.c:793 cp2112_xfer() error: __memcpy() ‘data->block[1]’ too small (33 vs 255) drivers/hid/hid-cp2112.c:793 cp2112_xfer() error: __memcpy() ‘buf’ too small (64 vs 255)

The ‘read_length’ variable is provided by ‘data->block[0]’ which comes from user and it(read_length) can take a value between 0-255. Add an upper bound to ‘read_length’ variable to prevent a buffer overflow in memcpy().

Reference

https://git.kernel.org/stable/c/26e427ac85c2b8d0d108cc80b6de34d33e2780c4 https://git.kernel.org/stable/c/381583845d19cb4bd21c8193449385f3fefa9caf https://git.kernel.org/stable/c/3af7d60e9a6c17d6d41c4341f8020511887d372d https://git.kernel.org/stable/c/519ff31a6ddd87aa4905bd9bf3b92e8b88801614 https://git.kernel.org/stable/c/8489a20ac481b08c0391608d81ed3796d373cfdf https://git.kernel.org/stable/c/e7028944e61014ae915e7fb74963d3835f2f761a https://git.kernel.org/stable/c/ebda3d6b004bb6127a66a616524a2de152302ca7

CNNVD-202506-2444 (Published: 2025-06-18)

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