What’s Vulnerable › Vulnerabilities

CVE-2021-27504: Texas Instruments FREERTOS Integer Overflow or Wraparound

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-21 · updated 2026-06-17
• Weakness: CWE-190

Description

Texas Instruments devices running FREERTOS, malloc returns a valid pointer to a small buffer on extremely large values, which can trigger an integer overflow vulnerability in 'malloc' for FreeRTOS, resulting in code execution.

Affected products

• FreeRTOS-Kernel: 10.4.1
• Ti Simplelink Cc13Xx Software Development Kit: before 4.40.00 — fixed in 4.40.00
• Ti Simplelink Cc26Xx Software Development Kit: before 4.40.00 — fixed in 4.40.00
• Ti Simplelink Cc32Xx Software Development Kit: before 4.10.03 — fixed in 4.10.03
• Ti Simplelink Msp432E401Y: all versions
• Ti Simplelink Msp432E411Y: all versions

How to fix

Upgrade to a fixed version: Ti Simplelink Cc13Xx Software Development Kit 4.40.00; Ti Simplelink Cc26Xx Software Development Kit 4.40.00; Ti Simplelink Cc32Xx Software Development Kit 4.10.03. Check the vendor advisory for mitigations.

References

• https://www.cisa.gov/news-events/ics-advisories/icsa-21-119-04
• https://www.ti.com/tool/TI-RTOS-MCU
• https://www.cisa.gov/news-events/ics-advisories/icsa-21-119-04
• https://www.ti.com/tool/TI-RTOS-MCU

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