Incorrect authorization in FreeRTOS - CVE-2026-109587
Published: November 9, 2026
Vulnerability identifier: #VU162913
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-109587
CWE-ID: CWE-863
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a low-privileged local attacker to read and write privileged kernel memory and escalate privileges.
The vulnerability exists due to incorrect memory-region boundary enforcement in the FreeRTOS-Kernel Arm Cortex-R82 MPU port when an unprivileged task passes a buffer argument to an MPU system call. A low-privileged local attacker can run such a task on a build with configENABLE_MPU=1 to access memory outside its assigned regions and bypass task isolation.
Affected software
FreeRTOS
How to mitigate CVE-2026-109587
Install security update from vendor's website.
FreeRTOS - update to 11.3.2