Use After Free in Freertos Freertos-Kernel
CVE-2026-77235
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.
Vulnerability class: Use-After-Free
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H.
Affected products
Weakness classification (CWE)
References
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (patch)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (third-party-advisory)
Frequently asked questions
- What is CVE-2026-77235?
- CVE-2026-77235 is a high-severity vulnerability in Freertos Freertos-Kernel, classified under Use After Free. CVSS score: 7.3/10. Published 2026-08-21.
- How severe is CVE-2026-77235?
- High severity. CVSS v3 base score is 7.3 out of 10.