CVE-2026-77234
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
FreeRTOS-Kernel before version 11.3.1 has improper input validation, which might allow an unprivileged task on MPU-enabled ports to execute code in privileged kernel context.
Risk Assessment
An unprivileged task could gain full kernel privileges, potentially leading to complete system compromise.
Recommendation
Upgrade FreeRTOS-Kernel to version 11.3.1 or later.
Other vulnerabilities in FreeRTOS-Kernel
See all- CVE-2026-77237Medium
Missing queue-set type validation in xQueueAddToSet() in the FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports with configUSE_QUEUE_SETS=1 to read privileged kernel memory. To remediate this issue, users should upgrade to version 11.3.1 or later.
- CVE-2026-77236High
FreeRTOS-Kernel before version 11.3.1 lacks minimum size validation in secure context allocation, which might allow local users to corrupt secure-world heap metadata via an out-of-bounds write with an undersized stack size parameter.
- CVE-2026-77235High
FreeRTOS-Kernel before version 11.3.1 lacks privilege verification in the secure context cleanup handler, which might allow local users to cause a use-after-free condition in secure-world memory via the SVC handler for secure context deallocation.
Original NVD description (English source)
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.