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CVE-2026-64275VulnerabilityPublished 07/25/2026

In the Linux kernel, the following vulnerability has been resolved: Input: elan_i2c - prevent division by zero and arithmetic underflow The Elan I2C… (CVE-2026-64275)

Source GCVE Database

Severity
Medium

No CVSS score published yet

Exploitation

Not in CISA KEV, no exploitation reported

EPSS
0.2% chance of exploitation in 30 days – higher than 4% of CVEs

What to do

AI-suggested

A fix has been implemented that adds checks to prevent division by zero and arithmetic underflow in the Elan I2C touchpad driver. Systems should apply the official Linux kernel update containing this fix once available. Until patched, avoid using devices with firmware or device tree configurations that provide zero values for x_traces or y_traces. Patch status is not explicitly confirmed in the provided data; check the vendor or Linux kernel advisory for the current remediation status and apply updates accordingly.

Description

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.

References