What’s Vulnerable › Vulnerabilities

CVE-2021-27411: Micrium OS Integer Overflow or Wraparound

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-03 · updated 2026-06-17
• Weakness: CWE-190

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.

Affected products

• Micrium OS: through 5.10.1

References

• https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04
• https://www.silabs.com/developers/micrium-os
• https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04
• https://www.silabs.com/developers/micrium-os

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