CVE-2026-77235

Published: Aug 21, 2026Modified: Aug 27, 2026

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5 (Secondary)

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.

Affected (1)

Products: Amazon: Freertos

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Amazon Freertos	From 10.2.0 to 11.3.1

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (3)

https://aws.amazon.com/security/security-bulletins/2026-086-aws/

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

Vendor Advisory

https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

Release Notes

https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-55pf-q87x-c58c

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

Vendor Advisory

Timeline

No history available yet.