micropython: A buffer overflow vulnerability in stm32_mw_usb_host of STMicroelectronicsin versions before 3.5.1 allows an attacker...
CVE-2021-42553 is fixed in micropython on 1 platform, first by micropython 1.12-1ubuntu0.1~esm1, released September 17, 2024. It is not reported as exploited. Patch Radar priority: Routine.
A buffer overflow vulnerability in stm32_mw_usb_host of STMicroelectronicsin versions before 3.5.1 allows an attacker to execute arbitrary code whenthe descriptor contains more endpoints than USBH_MAX_NUM_ENDPOINTS. Thelibrary is typically integrated when using a RTOS such as FreeRTOS on STM32MCUs.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| micropython · Ubuntu 20.04 LTS (focal) | 1.12-1ubuntu0.1~esm1 | micropython 1.12-1ubuntu0.1~esm1 | Sep 17, 2024 |
| micropython · Ubuntu 22.04.1 LTS (jammy) | 1.17+ds-1.1ubuntu2+esm1 | micropython 1.17+ds-1.1ubuntu2+esm1 | Sep 17, 2024 |
| micropython · Ubuntu 24.04.5 LTS (noble) | 1.22.1+ds-1ubuntu0.24.04.1~esm1 | micropython 1.22.1+ds-1ubuntu0.24.04.1~esm1 | Sep 17, 2024 |
| micropython · Ubuntu 24.10 (oracular) | 1.22.1+ds-1ubuntu0.24.10.1 | micropython 1.22.1+ds-1ubuntu0.24.10.1 | Jan 16, 2026 |
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