Medium 5.5Published Jul 25, 2026

CVE-2026-64275Input: elan_i2c - prevent division by zero and arithmetic underflow

Updated under an hour ago (Oct 27, 2026, 8:40 PM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	6696777c6506fa52b2a0282121195843ed855be6 builds before 59d4cc5e7a9785e4bdc9c55273274c6b49d4b58d; from 6696777c6506fa52b2a0282121195843ed855be6 before f6d10af2036d1d4a847a74fe47ebbf93bce3c84c; 6696777c6506fa52b2a0282121195843ed855be6 builds before 2f281ff0163a38fdc4cb4061f0c241e643283a5e; 6696777c6506fa52b2a0282121195843ed855be6 builds before 8c1db3418a419e788691746b9c47f863c2fd4890; from 6696777c6506fa52b2a0282121195843ed855be6 before feb4866a42ec94764c7eb58012256f6f37664727; 6696777c6506fa52b2a0282121195843ed855be6 builds before 01e0317c256c560d8dcce2e9825eb6142ee34611; 6696777c6506fa52b2a0282121195843ed855be6 builds before 6bac57d8fe2a077b8a85b4140eeb7999078158eb; from 6696777c6506fa52b2a0282121195843ed855be6 before df2b818fa009c10ff6ba875a1663ff001cda9558	CNA record
linux linux_kernel linux:linux_kernel	from 3.19 before 5.10.261; from 5.11 before 5.15.212; from 5.16 before 6.1.178; from 6.2 before 6.6.145; from 6.7 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4	NVD

References

References

https://git.kernel.org/stable/c/59d4cc5e7a9785e4bdc9c55273274c6b49d4b58d	patch
https://git.kernel.org/stable/c/f6d10af2036d1d4a847a74fe47ebbf93bce3c84c	patch
https://git.kernel.org/stable/c/2f281ff0163a38fdc4cb4061f0c241e643283a5e	patch
https://git.kernel.org/stable/c/8c1db3418a419e788691746b9c47f863c2fd4890	patch
https://git.kernel.org/stable/c/feb4866a42ec94764c7eb58012256f6f37664727	patch
https://git.kernel.org/stable/c/01e0317c256c560d8dcce2e9825eb6142ee34611	patch
https://git.kernel.org/stable/c/6bac57d8fe2a077b8a85b4140eeb7999078158eb	patch
https://git.kernel.org/stable/c/df2b818fa009c10ff6ba875a1663ff001cda9558	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.