cvedb.io
CVE-2021-43997
HIGH · CVSS 7.8
EPSS exploitation probability: 0%
Published 2021-11-17T21:15:07.780 · Last modified 2026-06-17T04:11:45.760

Summary

FreeRTOS versions 10.2.0 through 10.4.5 do not prevent non-kernel code from calling the xPortRaisePrivilege internal function to raise privilege. FreeRTOS versions through 10.4.6 do not prevent a third party that has already independently gained the ability to execute injected code to achieve further privilege escalation by branching directly inside a FreeRTOS MPU API wrapper function with a manually crafted stack frame. These issues affect ARMv7-M MPU ports, and ARMv8-M ports with MPU support enabled (i.e. configENABLE_MPU set to 1). These are fixed in V10.5.0 and in V10.4.3-LTS Patch 3.

Affected products

amazon — freertos

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.