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…

PriorityP336medium6.5CVSS 3.1

AVNACLPRNUINSUCLINAL

EPSS

0.30%

21.7th percentile

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.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
zephyrproject-rtos	zephyr	* – 4.2	—

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