CVE-2021-32020 Memory corruption in n/a
Insufficient bounds checking in the FreeRTOS kernel heap management allows attackers to cause memory corruption, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-32020?
CVE-2021-32020 is a critical memory corruption vulnerability in n/a, published on 3 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The kernel in Amazon Web Services FreeRTOS before 10.4.3 has insufficient bounds checking during management of heap memory.
Weakness: CWE-119
Which versions are affected by CVE-2021-32020?
It affects 1 product.
Products include Amazon Freertos.
How do I fix CVE-2021-32020?
No fix has been published for CVE-2021-32020 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-32020 being exploited?
There is no known exploitation of CVE-2021-32020 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2021-31571 Integer overflow in n/a
- CVE-2021-31572 Integer overflow in n/a
- CVE-2026-77234 Improper input validation in FreeRTOS-Kernel timer command handling
- CVE-2024-28115 Privilege Escalation in FreeRTOS Kernel ARMv7-M MPU ports and ARMv8-M ports with MPU support enabled
- CVE-2026-77235 Missing privilege check in SecureContext_FreeContext in FreeRTOS-Kernel
Sources
Also known as GHSA-8pwj-qgrj-p95h.