{"id":"CVE-2026-77234","title":"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","summary":"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.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-863"],"vendor":"amazon","product":"freertos","affected":["freertos >= 7.0.0, < 11.3.1"],"patched":["freertos 11.3.1"],"published":"2026-08-21","updated":"2026-10-14","sourceUpdated":"2026-10-14T19:10:00.297","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77234","references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-086-aws/","label":"ff89ba41-3aa1-4d27-914a-91399e9639e5"},{"url":"https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1","label":"ff89ba41-3aa1-4d27-914a-91399e9639e5"},{"url":"https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-w3vr-pr75-5hc6","label":"ff89ba41-3aa1-4d27-914a-91399e9639e5"}],"tags":["nvd"],"epss":0.0017,"epssPercentile":0.0593,"ingestedAt":"2026-10-14T19:49:57.564Z","slug":"CVE-2026-77234","body":"## Overview\n\nImproper 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.\n\n## Affected\n\n- `freertos >= 7.0.0, < 11.3.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `freertos 11.3.1`","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}