CVE-2026-109587 PUBLISHED

Incorrect authorization in the Arm Cortex-R82 MPU port in FreeRTOS-Kernel

Assigner: AMZN
Reserved: 12.10.2026 Published: 16.10.2026 Updated: 16.10.2026

Incorrect authorization in the Arm Cortex-R82 (Armv8-R AArch64) MPU port in FreeRTOS-Kernel V11.3.0 and V11.3.1 might allow an unprivileged task on MPU-enabled builds to read and write privileged kernel memory outside the regions assigned to it, via a buffer argument passed to an MPU system call.

To remediate this issue, users should upgrade to version V11.3.2 or later.

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS Score: 8.8

Attack Vector	Local	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	FreeRTOS
Product	FreeRTOS-Kernel
Versions	Default: unaffected affected from 11.3.0 to 11.3.1 (incl.)

Credits

Ada Logics Ltd finder
Anthropic finder

References

Problem Types

CWE-863 Incorrect authorization CWE

Impacts

CAPEC-233 Privilege Escalation