What is CVE-2026-1679?

CVE-2026-1679 is a high-severity vulnerability in Zephyrproject-rtos Zephyr, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.3/10. Published 2026-03-27.

How severe is CVE-2026-1679?

High severity. CVSS v3 base score is 7.3 out of 10.

Buffer overflow in Zephyrproject-rtos Zephyr

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`, corrupting kernel memory (CWE-120). Exploit requires local code that can call the…

Vulnerability class: Buffer Overflow

EPSS: 0.001 (18.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H.

Affected products

Zephyrproject-rtos Zephyr

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-qx3g-5g22-fq5w

Frequently asked questions

What is CVE-2026-1679?: CVE-2026-1679 is a high-severity vulnerability in Zephyrproject-rtos Zephyr, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.3/10. Published 2026-03-27.
How severe is CVE-2026-1679?: High severity. CVSS v3 base score is 7.3 out of 10.