Type Confusion Affecting zephyrproject-rtos/zephyr package, versions [,4.3.0-rc3)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UNMANAGED-ZEPHYRPROJECTRTOSZEPHYR-15170842
- published2 Feb 2026
- disclosed30 Jan 2026
- credittempus-fuzzer
Introduced: 30 Jan 2026
CVE-2025-12899 (opens in a new tab)How to fix?
Upgrade zephyrproject-rtos/zephyr to version 4.3.0-rc3 or higher.
Overview
Affected versions of this package are vulnerable to Type Confusion in the icmpv6_handle_echo_request() function. An attacker can read out-of-bounds memory by sending a an IPv4 packet containing ICMP type 128, which is misclassified as an ICMPv6 Echo Request.