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.

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
FreeRTOS FreeRTOS-Kernel unaffected
Version Status Constraints
10.2.0 affected ≤ 11.3.0

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Project Subscriptions

Vendors Products
Freertos Subscribe
Freertos-kernel Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://aws.amazon.com/security/security-bulletins/2026-086-aws/ cve-icon cve-icon
https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1 cve-icon cve-icon
History

Fri, 21 Aug 2026 18:15:00 +0000

Type Values Removed Values Added
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. 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.

Fri, 21 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
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.
Title Missing privilege check in SecureContext_FreeContext in FreeRTOS-Kernel
First Time appeared Freertos
Freertos freertos-kernel
Weaknesses CWE-416
CPEs cpe:2.3:a:freertos:freertos-kernel:*:*:*:*:*:*:*:*
Vendors & Products Freertos
Freertos freertos-kernel
References
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H'}

cvssV4_0

{'score': 8.3, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-08-21T19:42:23.681Z

Reserved: 2026-08-20T18:42:39.750Z

Link: CVE-2026-77235

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-21T18:16:51.657

Modified: 2026-08-21T18:16:51.657

Link: CVE-2026-77235

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses