Use After Free Affecting zephyrproject-rtos/zephyr package, versions [,4.3.1-rc1)[4.4.0-rc1,4.4.1-rc1)
Threat Intelligence
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.
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Test your applications- Snyk IDSNYK-UNMANAGED-ZEPHYRPROJECTRTOSZEPHYR-17391873
- published21 Jun 2026
- disclosed16 Jun 2026
- creditUnknown
Introduced: 16 Jun 2026
CVE-2026-10638 (opens in a new tab)How to fix?
Upgrade zephyrproject-rtos/zephyr to version 4.3.1-rc1, 4.4.1-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the icmpv6_handle_echo_request or net_icmpv6_send_error process. An attacker can cause a crash and potentially corrupt memory by sending a crafted ICMPv6 Echo Request or an IPv6 packet that triggers an ICMPv6 error. This is only exploitable if the networking stack is configured with CONFIG_NET_NATIVE_IPV6 and the affected statistics per interface option is enabled.