CVE-2021-31571

9.8 criticalEPSS 1.4%

Critical (9.8) in amazon freertos. EPSS 1.4% chance of exploitation in the next 30 days.

The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in queue.c for queue creation.

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-11-01)
CWE: CWE-190
Published: 2021-04-22
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19