What’s Vulnerable › Vulnerabilities

CVE-2020-10063: Remote Denial of Service in CoAP Option Parsing Due To Integer Overflow

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-05 · updated 2026-06-17
• Weakness: CWE-190

Description

A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able to cause a denial of service. This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.

Affected products

• zephyrproject zephyr: through 2.2.0

References

• https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10063
• https://github.com/zephyrproject-rtos/zephyr/pull/24435
• https://github.com/zephyrproject-rtos/zephyr/pull/24530
• https://github.com/zephyrproject-rtos/zephyr/pull/24531
• https://github.com/zephyrproject-rtos/zephyr/pull/24535
• https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-55
• https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10063
• https://github.com/zephyrproject-rtos/zephyr/pull/24435
• https://github.com/zephyrproject-rtos/zephyr/pull/24530
• https://github.com/zephyrproject-rtos/zephyr/pull/24531
• https://github.com/zephyrproject-rtos/zephyr/pull/24535
• https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-55

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