CVE-2026-1679 — Classic Buffer Overflow in Zephyr

CWE-120 — Classic Buffer Overflow3 documents3 sources
Severity
7.8HIGHNVD
CNA7.3
EPSS
0.0%
top 86.37%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Zephyrproject-rtos ZephyrZephyrproject Zephyr
Timeline
Latest updateMar 27
PublishedMar 28

Description

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages2 packages

▶CVEListV5zephyrproject-rtos/zephyr* — 4.3

Patches

Patch: github.com ↗

🔴Vulnerability Details

1
CVEList
net: eswifi socket send payload length not bounded↗2026-03-27
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🕵️Threat Intelligence

1
Wiz
CVE-2026-1679 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-1679 — Classic Buffer Overflow in Zephyr | cvebase