CVE-2025-12899 MEDIUM

CVE-2025-12899: net: icmp: Out of bound memory read

Vendor Zephyrproject-Rtos
Product Zephyr
Weakness CWE-843
Published January 30, 2026
Last update January 30, 2026

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 30, 2026 CVE published
January 30, 2026 Record updated