CVE-2025-12899

A flaw in Zephyr’s network stack allows an IPv4 packet containing ICMP type 128 to be misclassified as an ICMPv6 Echo Request. This results in an out-of-bounds memory read and creates a potential information-leak vulnerability in the networking subsystem.

Score

CVSS 3.1 6.5 Medium

Status

Deferred - vulnerabilities@zephyrproject.org

Published

2026-01-30

Last modified

2026-10-13

Weaknesses

CWE-843

Affected products

• Zephyr (Zephyrproject-rtos)

References

• https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-c2vg-hj83-c2vg