Medium severity · published Jan 30, 2026
CVE-2025-12899
net: icmp: Out of bound memory read
6.5
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZE
Zephyr · zephyrproject-rtos
before 3.7.2; 4.0.0 before 4.2.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-12899
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-12899
github.com
https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-c2vg-hj83-c2vg
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