Incorrect Privilege Assignment Affecting FreeRTOS/FreeRTOS-Kernel package, versions [10.4.3, 10.4.6)[,10.4.3-LTS-Patch-2)
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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- published17 Nov 2025
- disclosed16 Nov 2025
- creditUnknown
Introduced: 16 Nov 2025
NewCVE-2021-43997 (opens in a new tab)How to fix?
Upgrade FreeRTOS/FreeRTOS-Kernel to version 10.4.6, 10.4.3-LTS-Patch-2 or higher.
Overview
Affected versions of this package are vulnerable to Incorrect Privilege Assignment via insufficient protection of internal MPU-related privilege-transition functions, like xRunningPrivileged. An attacker who has already achieved code execution can further escalate privileges by branching into an MPU API wrapper with a manually crafted stack frame. These flaws allow untrusted code to obtain elevated access.