Integer overflow in Linux kernel - CVE-2026-64236
Published: July 27, 2026
Vulnerability identifier: #VU139772
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-64236
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to integer truncation in the i2c-davinci driver probe function when processing a device tree configuration with a missing clock-frequency property. A local attacker can provide a device tree configuration that triggers a division by zero to cause a denial of service.
The issue results in a deterministic kernel panic during probe while calculating clock dividers.
How to mitigate CVE-2026-64236
Install security update from vendor's repository.