CVE-2026-1679: Zephyrproject Zephyr

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

The eswifi socket offload driver copies user-provided payloads into a fixed buffer without checking available space; oversized sends overflow `eswifi->buf`, corrupting kernel memory (CWE-120). Exploit requires local code that can call the socket send API; no remote attacker can reach it directly.

Affected products

• Zephyrproject Zephyr: up to and including 4.3.0

Published 2026-03-28. Last modified 2026-06-17.