{"id":"CVE-2026-109588","published":"2026-10-16T18:17:31.457","lastModified":"2026-10-16T20:02:37.630","description":"Numeric truncation of the buffer length in the MPU buffer authorization check in FreeRTOS-Kernel V11.3.0 and V11.3.1 on the Arm Cortex-R82 (Armv8-R AArch64) MPU port might allow, under certain conditions, an unprivileged task on MPU-enabled builds to read or write privileged kernel memory beyond the validated buffer window, via a stream buffer system call.\n\n\n\nTo remediate this issue, users should upgrade to version V11.3.2 or later.","cvssScore":8.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwes":["CWE-125","CWE-197","CWE-787"],"vendors":[],"products":[],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-138-aws/","tags":[]},{"url":"https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.2","tags":[]},{"url":"https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-qf4j-6f5j-876g","tags":[]}],"exploitRefs":[{"url":"https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.2","tags":[]},{"url":"https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-qf4j-6f5j-876g","tags":[]}],"hasPoc":true,"ai":null}