Buffer overflow in Zephyrproject 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 socket send API; no remote attacker can reach it directly.
Vulnerability class: Buffer Overflow
EPSS: 0.002 (12.1th 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
Weakness classification (CWE)
References
- vulnerabilities@zephyrproject.org (Exploit, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-1679?
- CVE-2026-1679 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.3/10. Published 2026-03-28.
- How severe is CVE-2026-1679?
- High severity. CVSS v3 base score is 7.3 out of 10.