Vulnerability · Published Aug 21, 2026 · Assigned by AMZN
CVE-2026-77235Missing privilege check in SecureContext_FreeContext in FreeRTOS-Kernel
High 7.3
In plain English
A high-severity use-after-free 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 5% of all known vulnerabilities).
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.2%top 95.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Missing privilege verification in the secure context cleanup handler in FreeRTOS-Kernel before 11.3.1 might allow local users to cause a use-after-free condition in secure-world memory via the SVC handler for secure context deallocation. To remediate this issue, users should upgrade to version 11.3.1 or later.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| FreeRTOS | FreeRTOS-Kernel | 10.2.0 – through 11.3.0 |
Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H