Reachable Assertion Affecting zephyrproject-rtos/zephyr package, versions [2.5.0,4.4.2-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-18302787
- published25 Jul 2026
- disclosed22 Jul 2026
- creditUnknown
Introduced: 22 Jul 2026
CVE-2026-10674 (opens in a new tab)How to fix?
Upgrade zephyrproject-rtos/zephyr to version 4.4.2-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Reachable Assertion through the uart_configure process. An attacker can cause a system crash by supplying unsupported configuration values for parity, data bits, stop bits, or flow control, which leaves the LPUART peripheral clocks disabled and results in a hard fault on subsequent register access. This is only exploitable if CONFIG_UART_USE_RUNTIME_CONFIGURE is enabled and an unprivileged userspace thread has access to an LPUART device.