CVE-2026-77234

Improper input validation in FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports to execute code in privileged kernel context. To remediate this issue, users should upgrade to version 11.3.1 or later.

Score

CVSS 4.0 9.3 Critical

Status

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

Published

2026-08-21

Last modified

2026-10-14

Weaknesses

CWE-863

Affected products

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

References

• https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1
• https://aws.amazon.com/security/security-bulletins/2026-086-aws/
• https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-w3vr-pr75-5hc6