Out-of-bounds Write Affecting zephyrproject-rtos/zephyr package, versions [,3.7.2-rc2)[4.0.0-rc1,4.2.2)[4.3.0-rc1,4.3.1-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-17391890
- published21 Jun 2026
- disclosed4 Jun 2026
- creditpdgendt
Introduced: 4 Jun 2026
CVE-2026-5066 (opens in a new tab)How to fix?
Upgrade zephyrproject-rtos/zephyr to version 3.7.2-rc2, 4.2.2, 4.3.1-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write in the connect function of socket_op_vtable when the TLS session cache is enabled. An attacker can cause a crash, denial of service, or potentially execute arbitrary code by supplying a crafted addrlen value that leads to out-of-bounds memory access during the memcpy operation.