What’s Vulnerable › Vulnerabilities

CVE-2023-4257: Unchecked user input length in the Zephyr WiFi shell module

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-10-13 · updated 2026-06-17
• Weakness: CWE-120

Description

Unchecked user input length in /subsys/net/l2/wifi/wifi_shell.c can cause buffer overflows.

Affected products

• zephyrproject zephyr: through 3.4.0

References

• http://packetstormsecurity.com/files/175657/Zephyr-RTOS-3.x.0-Buffer-Overflows.html
• http://seclists.org/fulldisclosure/2023/Nov/1
• http://www.openwall.com/lists/oss-security/2023/11/07/1
• https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-853q-q69w-gf5j
• http://packetstormsecurity.com/files/175657/Zephyr-RTOS-3.x.0-Buffer-Overflows.html
• http://seclists.org/fulldisclosure/2023/Nov/1
• http://www.openwall.com/lists/oss-security/2023/11/07/1
• https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-853q-q69w-gf5j

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