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CVE-2026-77237 Details

Description

Missing queue-set type validation in xQueueAddToSet() in the FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports with configUSE_QUEUE_SETS=1 to read privileged kernel memory. To remediate this issue, users should upgrade to version 11.3.1 or later.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.4 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H

CNA: AMZNCVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-086-aws/	AMZN	Vendor Advisory
https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1	AMZN	Release Notes
https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-9wvc-hqvx-5wf5	AMZN	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-125	Out-of-bounds Read	AMZN
CWE-843	Access of Resource Using Incompatible Type ('Type Confusion')	AMZN

Affected Products

Product	Versions
amazon freertos	>= 7.4.0, < 11.3.1
CPE cpe:2.3:o:amazon:freertos:::::::: Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Aug 25, 2026	Initial Analysis	[email protected]
Aug 21, 2026	CVE Modified	AMZN
Aug 21, 2026	CVE Modified	CISA-ADP
Aug 21, 2026	CVE Modified	AMZN
Aug 21, 2026	New CVE Received	AMZN