What’s Vulnerable › Vulnerabilities

CVE-2021-28362

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-24 · updated 2026-06-17
• Weakness: CWE-191

Description

An issue was discovered in Contiki through 3.0. When sending an ICMPv6 error message because of invalid extension header options in an incoming IPv6 packet, there is an attempt to remove the RPL extension headers. Because the packet length and the extension header length are unchecked (with respect to the available data) at this stage, and these variables are susceptible to integer underflow, it is possible to construct an invalid extension header that will cause memory corruption issues and lead to a Denial-of-Service condition. This is related to rpl-ext-header.c.

Affected products

• Contiki-Os Contiki: through 3.0

References

• https://github.com/contiki-os/contiki/releases
• https://www.kb.cert.org/vuls/id/815128
• https://github.com/contiki-os/contiki/releases
• https://www.kb.cert.org/vuls/id/815128

Get alerted when CVE-2021-28362 or the next vulnerability affects your stack