CVE-2026-77234

critical · 9.3

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.

9.3

CVSS

0.2%

EPSS (exploit prob.)

6th

EPSS percentile

2026-08-21

Published

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-863

Affected products

Vendor	Product	Affected versions
amazon	freertos	>= 7.0.0, < 11.3.1

Check a specific version with /api/v1/cve/match.

References

https://aws.amazon.com/security/security-bulletins/2026-086-aws/
https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1
https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-w3vr-pr75-5hc6

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-77234