EUVD-2026-43696

On Xtensa SoCs built with CONFIGXTENSAMPU and CONFIGUSERSPACE, archbuffervalidate in arch/xtensa/core/mpu.c — the architecture hook that verifies a user-mode-supplied buffer is accessible to the calling user thread with the requested permission — defaulted its return value to 0 access permitted a...

PT-2026-58036

Name of the Vulnerable Software and Affected Versions Zephyr OS versions 3.7.0 through 4.4.0 Description On Xtensa SoCs configured with CONFIG XTENSA MPU and CONFIG USERSPACE, the arch buffer validate function in arch/xtensa/core/mpu.c incorrectly permits access to memory when a buffer's rounded...