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

Input: elan_i2c - prevent division by zero and arithmetic underflow

The Elan I2C touchpad driver queries the device for its physical
dimensions and trace counts to calculate the device resolution and width.
However, if the device firmware or device tree provides invalid zero
values for x_traces or y_traces, it results in a fatal division-by-zero
exception leading to a kernel panic during device probe.

Add checks to ensure these parameters are non-zero before performing
the division. If invalid trace values are detected, fall back to a safe
default of 1.

Additionally, prevent an arithmetic underflow in the touch reporting
logic. Previously, if the calculated or fallback width was smaller than
ETP_FWIDTH_REDUCE (90), the subtraction would underflow, resulting in a
massive unsigned integer being reported to userspace. Clamp the adjusted
width to a minimum of 0 to safely handle small physical dimensions and
fallback scenarios.

Completing the probe with safe fallback values ensures the sysfs nodes
are created, keeping the firmware update path intact so a recovery
firmware can be flashed to the device.

https://git.kernel.org/stable/c/01e0317c256c560d8dcce2e9825eb6142ee34611

https://git.kernel.org/stable/c/2f281ff0163a38fdc4cb4061f0c241e643283a5e

https://git.kernel.org/stable/c/59d4cc5e7a9785e4bdc9c55273274c6b49d4b58d

https://git.kernel.org/stable/c/6bac57d8fe2a077b8a85b4140eeb7999078158eb

https://git.kernel.org/stable/c/8c1db3418a419e788691746b9c47f863c2fd4890

https://git.kernel.org/stable/c/df2b818fa009c10ff6ba875a1663ff001cda9558

https://git.kernel.org/stable/c/f6d10af2036d1d4a847a74fe47ebbf93bce3c84c

https://git.kernel.org/stable/c/feb4866a42ec94764c7eb58012256f6f37664727

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