CVE-2021-27411

Name: CVE-2021-27411
Creator: NVD / NIST
Published: 2022-05-03T21:15:08.117+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.79%

Last modified Jun 17, 2026

CVE-2021-27411 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Micrium OS Versions 5.10.1 and prior are vulnerable to integer wrap-around in functions Mem_DynPoolCreate, Mem_DynPoolCreateHW and Mem_PoolCreate. This unverified memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as very small blocks of memory being allocated instead of very large ones.. EPSS estimates a 0.79% chance of exploitation in the next 30 days.

Description

Micrium OS Versions 5.10.1 and prior are vulnerable to integer wrap-around in functions Mem_DynPoolCreate, Mem_DynPoolCreateHW and Mem_PoolCreate. This unverified memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as very small blocks of memory being allocated instead of very large ones.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.79%

51.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Silabs	Micrium Os	<= 5.10.1

References

https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04Third Party Advisory, US Government Resource
https://www.silabs.com/developers/micrium-osProduct, Vendor Advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04Third Party Advisory, US Government Resource
https://www.silabs.com/developers/micrium-osProduct, Vendor Advisory

Timeline

Published: May 3, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27411?

How severe is CVE-2021-27411?

CVE-2021-27411 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27411?

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-2021-27411?

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

Scan your code now

Source: NVD / NIST