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-17391867
- published21 Jun 2026
- disclosed16 Jun 2026
- creditTim Pambor
Introduced: 16 Jun 2026
CVE-2026-10636 (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 via the igmp_send function. An attacker can cause undefined behavior, including sporadic crashes or corruption of statistics, by sending specially crafted IPv4 IGMP membership queries to 224.0.0.1 or by triggering local multicast join, leave, or rejoin operations. A controllable write may be possible if the asynchronous TX path is used concurrently with slab reuse.