{"id":"CVE-2026-109587","title":"Incorrect authorization in the Arm Cortex-R82 MPU port in FreeRTOS-Kernel","summary":"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 assigne…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-863"],"vendor":"FreeRTOS","product":"FreeRTOS-Kernel","affected":["FreeRTOS-Kernel >= 11.3.0 <= 11.3.1"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-20T15:14:49.090767Z"},"published":"2026-10-16","updated":"2026-10-20","sourceUpdated":"2026-10-20T15:16:10.707Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109587","references":[{"url":"https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.2"},{"url":"https://aws.amazon.com/security/security-bulletins/2026-138-aws/"},{"url":"https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-pv9j-rq42-3fjc"}],"tags":["cve.org"],"epss":0.00138,"epssPercentile":0.03113,"ingestedAt":"2026-10-16T18:43:08.831Z","slug":"CVE-2026-109587","body":"## Overview\n\nIncorrect 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.\n\n\n\nTo remediate this issue, users should upgrade to version V11.3.2 or later.\n\n## Affected\n\n- `FreeRTOS-Kernel >= 11.3.0 <= 11.3.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}