CVE-2026-77237

Missing type validation in xQueueAddToSet in FreeRTOS-Kernel

State: Published
Severity: 8.2 High
Published: Aug 21, 2026
Updated: Aug 21, 2026
Reserved: Aug 20, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.2 High	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N	AMZN
3.1	6.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N	AMZN

Weaknesses

CWE-843 Access of resource using incompatible type ('type confusion')
CWE-125 Out-of-bounds read

Affected Products

Product	Versions
FreeRTOS-KernelFreeRTOS	7.4.0 through 11.3.0Affected

References

https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1patch
https://aws.amazon.com/security/security-bulletins/2026-086-aws/vendor-advisory
https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-9wvc-hqvx-5wf5third-party-advisory

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