CVE-2026-10674
- Source
- https://cve.org/CVERecord?id=CVE-2026-10674
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-10674.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-10674
- Aliases
-
- GHSA-mw68-r353-m3vf
- Published
- 2026-07-21T21:30:53Z
- Modified
- 2026-07-24T04:01:15Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- DoS (hard fault) in NXP LPUART driver: unsupported runtime UART config leaves clocks disabled
- Details
-
The NXP LPUART serial driver (drivers/serial/uart_mcux_lpuart.c), when CONFIG_UART_USE_RUNTIME_CONFIGURE is enabled, called LPUART_Deinit() at the start of mcux_lpuart_configure(), which disables the LPUART peripheral clocks. The requested configuration is validated only afterwards (in mcux_lpuart_configure_basic), and unsupported parity/data-bit/stop-bit/flow-control values return -ENOTSUP before the clock is re-enabled.
As a result, a uart_configure() request with an unsupported configuration left the LPUART in a clock-disabled state; any subsequent access to LPUART registers (poll_out/poll_in, interrupt handling, or a later reconfigure) faults on the gated peripheral and escalates to a hard fault, crashing the system.
uart_configure() is a Zephyr syscall whose verifier (z_vrfy_uart_configure) only checks that cfg is readable user memory and forwards the caller-supplied configuration unchanged, so an unprivileged userspace thread with access to an LPUART device can deterministically trigger the fault, a persistent system-wide denial of service.
Introduced in v2.5.0 and present in all subsequent releases until this fix, which removes the LPUART_Deinit() call and instead only disables the transmitter/receiver, leaving the clock running.
- Database specific
{ "cna_assigner": "zephyr", "cwe_ids": [ "CWE-617" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10674.json", "unresolved_ranges": [ { "extracted_events": [ { "introduced": "3.7.0" }, { "fixed": "4.5.0" } ], "source": "AFFECTED_FIELD" } ] }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10674.json
- https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-mw68-r353-m3vf
- https://nvd.nist.gov/vuln/detail/CVE-2026-10674
- https://github.com/zephyrproject-rtos/zephyr/commit/f56935c46fdf6559a20ad8484b29896ecac5808f
- https://github.com/zephyrproject-rtos/zephyr