PT-2026-5379 · Zephyr · Zephyr

Published 2026-01-30 · Updated 2026-01-30 · CVE-2025-12899

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Zephyr (affected versions not specified)

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, potentially leading to an information leak within the networking subsystem.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Type Confusion

Weakness Enumeration

CWE-843

Related Identifiers

CVE-2025-12899

GHSA-C2VG-HJ83-C2VG

Affected Products

Zephyr

References · 6

• https://osv.dev/vulnerability/CVE-2025-12899 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-12899 · Security Note
• https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-c2vg-hj83-c2vg · Note
• https://twitter.com/CVEnew/status/2017132857148526811 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2017144732917375034 · Twitter Post
• https://t.me/cveNotify/150367 · Telegram Post