CVE-2026-77236

Missing minimum size validation in secure context allocation in FreeRTOS-Kernel before 11.3.1 might allow local users to corrupt secure-world heap metadata via an out-of-bounds write with an undersized stack size parameter. To remediate this issue, users should upgrade to version 11.3.1 or later.

Score

CVSS 4.0 8.3 High

Status

Analyzed - ff89ba41-3aa1-4d27-914a-91399e9639e5

Published

2026-08-21

Last modified

2026-10-14

Weaknesses

CWE-787

Affected products

• Freertos (Amazon)
• Freertos-kernel (Freertos)

References

• https://aws.amazon.com/security/security-bulletins/2026-086-aws/
• https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1
• https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-vq2f-9qj3-jj2m