Vulnerability · Published Aug 21, 2026 · Assigned by AMZN
CVE-2026-77237Missing type validation in xQueueAddToSet in FreeRTOS-Kernel
Medium 6.5
In plain English
A medium-severity type confusion 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 7% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.2%top 92.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Missing queue-set type validation in xQueueAddToSet() in the FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports with configUSE_QUEUE_SETS=1 to read privileged kernel memory. To remediate this issue, users should upgrade to version 11.3.1 or later.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| FreeRTOS | FreeRTOS-Kernel | 7.4.0 – through 11.3.0 |
Weakness: CWE-843, CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N