Type Confusion in FreeRTOS - CVE-2026-119086
Published: November 9, 2026
Vulnerability identifier: #VU162914
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-119086
CWE-ID: CWE-843
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker with low privileges to compromise privileged execution integrity and cross the FreeRTOS-Kernel MPU task-isolation boundary.
The vulnerability exists due to missing object-type validation in xQueueSelectFromSet on MPU-enabled builds with queue sets enabled through configUSE_QUEUE_SETS=1. A local attacker with low privileges can pass an incompatible kernel object from an unprivileged task to trigger a queue-set operation that writes beyond its intended destination while executing in a privileged context.
Affected software
FreeRTOS
How to mitigate CVE-2026-119086
Install security update from vendor's website.
FreeRTOS - update to 11.3.3