CVE-2026-109588Numeric truncation in the MPU buffer authorization check in FreeRTOS-Kernel
Updated under an hour ago ()
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It affects FreeRTOS-Kernel. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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. To remediate this issue, users should upgrade to version V11.3.2 or later.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-197, CWE-787, CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- AMZN
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 16, 2026
Affected products
FreeRTOS FreeRTOS-Kernel freertos:kernel (from the name) | from 11.3.0 through 11.3.1 | CNA record |
References
- https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.2release-notes, patch
- https://aws.amazon.com/security/security-bulletins/2026-138-aws/vendor-advisory
- https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-qf4j-6f5j-876gthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.