CVE-2021-27502

Name: CVE-2021-27502
Creator: NVD / NIST
Published: 2023-11-21T18:15:07.51+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.28%

Last modified Jun 17, 2026

CVE-2021-27502 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Texas Instruments TI-RTOS, when configured to use HeapMem heap(default), malloc returns a valid pointer to a small buffer on extremely large values, which can trigger an integer overflow vulnerability in 'HeapMem_allocUnprotected' and result in code execution.. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

Description

Texas Instruments TI-RTOS, when configured to use HeapMem heap(default), malloc returns a valid pointer to a small buffer on extremely large values, which can trigger an integer overflow vulnerability in 'HeapMem_allocUnprotected' and result in code execution.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.28%

19.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Ti	Real-Time Operating System	All versions
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
Ti	Simplelink Msp432e401y	All versions
Ti	Simplelink Msp432e411y	All versions

References

https://www.cisa.gov/news-events/ics-advisories/icsa-21-119-04Third Party Advisory, US Government Resource
https://www.ti.com/tool/TI-RTOS-MCUProduct
https://www.cisa.gov/news-events/ics-advisories/icsa-21-119-04Third Party Advisory, US Government Resource
https://www.ti.com/tool/TI-RTOS-MCUProduct

Timeline

Published: Nov 21, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27502?

How severe is CVE-2021-27502?

CVE-2021-27502 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27502?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27502?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST