Description
Missing queue-set type validation in the queue-set selection system call in FreeRTOS-Kernel before V11.3.3 on MPU-enabled ports with queue sets enabled allows a local unprivileged task to write actor-controlled data beyond a pointer-sized object on the privileged kernel stack, affecting privileged memory across the MPU isolation boundary.
To remediate this issue, users should upgrade to FreeRTOS-Kernel V11.3.3, rebuild, and reflash affected firmware. Builds that do not enable queue sets are not affected.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Kernel | 7.4.0 – ≤ 11.3.2 | — |
References
- https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.3 release-notes patch
- https://aws.amazon.com/security/security-bulletins/2026-158-aws/ vendor-advisory
- https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-56j9-g43f-8g6v third-party-advisory