{"id":"CVE-2026-77236","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-77236","summary":"Missing minimum size validation in secure context allocation in FreeRTOS-Kernel before 11.3.1 might allow local users to corrupt secure-world heap metadata via an out-of-bounds write…","details":"Missing minimum size validation in secure context allocation in FreeRTOS-Kernel before 11.3.1 might allow local users to corrupt secure-world heap metadata via an out-of-bounds write with an undersized stack size parameter. To remediate this issue, users should upgrade to version 11.3.1 or later.","published":"2026-08-21T18:16:51.800","modified":"2026-08-21T18:16:51.800","cvss":{"score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://aws.amazon.com/security/security-bulletins/2026-086-aws/"},{"type":"WEB","url":"https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-21T18:16:51.800"}}