PatchTheCVEfreertos vulnerabilities and fixes
Recent CVEs affecting freertos, with upgrade or downgrade steps. 4 tracked.
freertos has 4 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 4. Most recent: 2026-08-21. Highest priority: CVE-2026-77234 (score 37/100).
- CVE-2026-77234 HIGH 8.8 UPGRADE Improper input validation in FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled por
- CVE-2026-77235 HIGH 7.3 UPGRADE Missing privilege verification in the secure context cleanup handler in FreeRTOS-Kernel before 11.3.1 might al
- CVE-2026-77236 HIGH 7.3 UPGRADE Missing minimum size validation in secure context allocation in FreeRTOS-Kernel before 11.3.1 might allow loca
- CVE-2026-77237 MEDIUM 6.5 UPGRADE Missing queue-set type validation in xQueueAddToSet() in the FreeRTOS-Kernel before 11.3.1 might allow an unpr
FAQ
How do I fix freertos vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is freertos being exploited right now?
None of the tracked freertos CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which freertos CVE should I patch first?
CVE-2026-77234 currently ranks highest (37/100): Improper input validation in FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled por.