CVE-2026-77235

Missing privilege check in SecureContext_FreeContext in FreeRTOS-Kernel

State: Published
Severity: 8.3 High
Published: Aug 21, 2026
Updated: Aug 27, 2026
Reserved: Aug 20, 2026

Description

Missing privilege verification in the secure context cleanup handler in FreeRTOS-Kernel before 11.3.1 might allow local users to cause a use-after-free condition in secure-world memory via the SVC handler for secure context deallocation. To remediate this issue, users should upgrade to version 11.3.1 or later.

Scores

CVSS	Score	Vector	Source
4.0	8.3 High	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:H/SA:H	AMZN
3.1	7.3 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H	AMZN

Weaknesses

CWE-416 Use after free

Affected Products

Product	Versions
FreeRTOS-KernelFreeRTOS	10.2.0 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-55pf-q87x-c58cthird-party-advisory

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