Vulnerability · Published Aug 21, 2026 · Assigned by AMZN
CVE-2026-77234Improper input validation in FreeRTOS-Kernel timer command handling
High 8.8
In plain English
A high-severity incorrect authorization in FreeRTOS-Kernel from FreeRTOS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.2%top 93.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| FreeRTOS | FreeRTOS-Kernel | 7.0.0 – through 11.3.0 |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H