Is CVE-2026-77235 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-77235 being exploited in the wild.

How severe is CVE-2026-77235?

High severity, with a CVSS score of 8.8, published 21 August 2026.

Which products and versions are affected?

Amazon FreeRTOS Kernel 7.0.0 to 11.3.0 (varies by CVE and configuration).

Is there a fix for CVE-2026-77235?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-77235 attacked?

It is attacked with local access or from the adjacent network, in an operating system.

Am I affected by CVE-2026-77235?

Check whether you run Amazon AWS, Amazon Freertos or Amazon FreeRTOS Kernel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-77235: AWS FreeRTOS-Kernel memory safety issues

CVE-2026-77235 · Severity: high · CVSS 8.8 · Published 2026-08-21

FreeRTOS-Kernel is a real-time operating system widely used in embedded microcontroller and IoT applications. AWS disclosed four memory safety vulnerabilities affecting different configurations of FreeRTOS—including those with memory protection units, ARM TrustZone security extensions, and queue management features—that could allow attackers to corrupt memory or escalate privileges within affected embedded systems.

Technologies: Amazon AWS, Amazon Freertos, Amazon FreeRTOS Kernel. Vendors: Amazon.

Quick answers

Is CVE-2026-77235 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-77235 being exploited in the wild.
How severe is CVE-2026-77235?: High severity, with a CVSS score of 8.8, published 21 August 2026.
Which products and versions are affected?: Amazon FreeRTOS Kernel 7.0.0 to 11.3.0 (varies by CVE and configuration).
Is there a fix for CVE-2026-77235?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-77235 attacked?: It is attacked with local access or from the adjacent network, in an operating system.
Am I affected by CVE-2026-77235?: Check whether you run Amazon AWS, Amazon Freertos or Amazon FreeRTOS Kernel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

AWS disclosed four distinct memory safety vulnerabilities in FreeRTOS-Kernel affecting different optional features. CVE-2026-77234 impacts versions ≥7.0.0 and ≤11.3.0 when the MPU is enabled with software timers; CVE-2026-77235 and CVE-2026-77236 affect versions ≥10.2.0 and ≤11.3.0 on ARM TrustZone-enabled ARMv8-M ports; CVE-2026-77237 affects versions ≥7.4.0 and ≤11.3.0 when queue sets are explicitly enabled (configUSE_QUEUE_SETS=1). Each vulnerability is specific to its configuration, meaning applications not using the affected feature set are not impacted. Specifics on the vulnerability class, root cause, or attack preconditions are not disclosed in the advisory. Patches are implied to be available but no explicit patch version guidance is provided in the available text.

Affected products

AWS FreeRTOS-Kernel 7.0.0 to 11.3.0 (varies by CVE and configuration)

Identifiers

CVE-2026-77235
CVE-2026-77237
CVE-2026-77234
CVE-2026-77236

Timeline

2026-08-21: disclosed
2026-09-09: advisory

References

https://aws.amazon.com/security/security-bulletins/rss/2026-086-aws/

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