CVE-2021-26461: Apache Nuttx

Critical severity, CVSS 9.8. EPSS: 5% chance of exploitation in the next 30 days.

Apache Nuttx Versions prior to 10.1.0 are vulnerable to integer wrap-around in functions malloc, realloc and memalign. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Affected products

• Apache Nuttx: before 10.1.0 (fixed in 10.1.0)

Published 2021-06-21. Last modified 2026-06-17.