CVE-2026-23178

Summary

In the Linux kernel, the following vulnerability has been resolved:

HID: i2c-hid: fix potential buffer overflow in i2c_hid_get_report()

i2c_hid_xfer is used to read recv_len + sizeof(__le16) bytes of data into ihid->rawbuf.

The former can come from the userspace in the hidraw driver and is only bounded by HID_MAX_BUFFER_SIZE(16384) by default (unless we also set max_buffer_size field of struct hid_ll_driver which we do not).

The latter has size determined at runtime by the maximum size of different report types you could receive on any particular device and can be a much smaller value.

Fix this by truncating recv_len to ihid->bufsize - sizeof(__le16).

The impact is low since access to hidraw devices requires root.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux85df713377ddc0482071c3e6b64c37bd1e48f1f1 < f9c9ad89d845f88a1509e9d672f65d234425fde9affected
LinuxLinux85df713377ddc0482071c3e6b64c37bd1e48f1f1 < cff3f619fd1cb40cdd89971df9001f075613d219affected
LinuxLinux85df713377ddc0482071c3e6b64c37bd1e48f1f1 < 786ec171788bdf9dda38789163f1b1fbb47f2d1eaffected
LinuxLinux85df713377ddc0482071c3e6b64c37bd1e48f1f1 < 2124279f1f8c32c1646ce98e75a1a39b23b7db76affected
LinuxLinux85df713377ddc0482071c3e6b64c37bd1e48f1f1 < 2497ff38c530b1af0df5130ca9f5ab22c5e92f29affected
LinuxLinux5.18affected
LinuxLinux0 < 5.18unaffected
LinuxLinux6.1.163 <= 6.1.*unaffected
LinuxLinux6.6.124 <= 6.6.*unaffected
LinuxLinux6.12.70 <= 6.12.*unaffected
LinuxLinux6.18.10 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

References