CVE-2026-1679: The eswifi socket offload driver copies user-provided payloads into a fixed buffer without checking available space; oversized sends overflow `eswifi->buf`…

PriorityP345high7.8CVSS 3.1

AVLACLPRLUINSUCHIHAH

EPSS

0.21%

11.9th percentile

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

2 ranges

Vendor	Product	Version range	Fixed in
zephyrproject-rtos	zephyr	* – 4.3	—
zephyrproject	zephyr	<= 4.3.0	—

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