Back to CVE records
High 8.8Published Aug 21, 2026
CVE-2026-77234Improper input validation in FreeRTOS-Kernel timer command handling
Updated under an hour ago ()
Does this affect you?
It affects FreeRTOS-Kernel and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Start free and add your stack
Free account, 1 product
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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- AMZN
- NVD analysis
- Analyzed
- Record last updated
- Aug 27, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
FreeRTOS FreeRTOS-Kernel freertos:kernel (from the name) | from 7.0.0 through 11.3.0 | CNA record |
amazon freertos amazon:freertos | from 7.0.0 before 11.3.1 | NVD |
References
- https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1patch, release-notes
- https://aws.amazon.com/security/security-bulletins/2026-086-aws/vendor-advisory
- https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-w3vr-pr75-5hc6third-party-advisory, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.