CVE-2026-119086

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductFreeRTOS-Kernel

PublishedOct 30, 2026

First seenNov 4, 2026

Weakness typeCWE-843CWE-843 CWE-121CWE-121

How to fix

Patches

github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.3

Vendor advisories

aws.amazon.com/security/security-bulletins/2026-158-aws/

Affected products

Product	Affected versions	Fixed in
FreeRTOS FreeRTOS-Kernel	7.4.0 ≤ v ≤ 11.3.2	—

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