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TI-2021-11681 Aliases CVE-2021-31572GHSA-rc5m-cw2g-xxwh

The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in stream_buffer.c for a stream buffer.

Priority MEDIUM 45CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in stream_buffer.c for a stream buffer.

Why it matters now

EPSS 0.01382 72nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:amazon:freertos:*:*:*:*:*:*:*:*before 10.4.3VulnerableAWS
  • cpe:2.3:o:amazon:freertos:*:*:*:*:*:*:*:* Versions before 10.4.3 Vulnerable ·AWS

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-31572
  2. 2026-10-03 Alias added: GHSA-rc5m-cw2g-xxwh

References

Patch 1

  • TI-2021-11999 The kernel in Amazon Web Services FreeRTOS before 10.4.3 has insufficient bounds checking… CVSS 3.1CRITICAL 9.8
  • TI-2021-11680 The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in queue.c for queue creation. CVSS 3.1CRITICAL 9.8
  • TI-2018-11856 Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up to V10.0.1 (with… CVSS 3.0HIGH 8.1
  • TI-2018-11855 Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up to V10.0.1 (with… CVSS 3.0HIGH 8.1
  • TI-2018-11896 An issue was discovered in Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up… CVSS 3.0HIGH 8.1
  • TI-2026-53921 Improper input validation in FreeRTOS-Kernel timer command handling CVSS 4.0CRITICAL 9.3
See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences