What’s Vulnerable › Vulnerabilities

CVE-2022-50156: HID: cp2112: prevent a buffer overflow in cp2112_xfer()

• Severity: high (CVSS 7.8 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: 2025-06-18 · updated 2026-08-04
• Weakness: CWE-787

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().

Affected products

• Linux kernel: from 4.15.1 before 4.19.256; from 4.20 before 5.4.211; from 5.5 before 5.10.137; from 5.11 before 5.15.61; from 5.16 before 5.18.18; from 5.19 before 5.19.2 — fixed in 4.19.256, 5.10.137, 5.15.61, 5.18.18, 5.19.2, 5.4.211

How to fix

Upgrade to a fixed version: Linux kernel 4.19.256, 5.10.137, 5.15.61, 5.18.18. Check the vendor advisory for mitigations.

References

• 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

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