CVE-2025-12899
Medium
Description
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductZephyr
PublishedJan 30, 2026
First seenJan 30, 2026
Weakness typeCWE-843CWE-843
How to fix
Update
- zephyrproject-rtos Zephyr3.7.2, 4.2.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| zephyrproject-rtos Zephyr | v < 3.7.2, 4.0.0 ≤ v < 4.2.2 | 3.7.2, 4.2.2 |
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