CVE-2021-27411

Micrium OS Integer Overflow or Wraparound

MEDIUM
6.5
CVSS Score
Published: May 3, 2022 at 08:18 PM UTC
Updated: June 17, 2026 at 03:44 AM UTC
2 products affected across 2 vendorsMicrium OSMicrium OS

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.9%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 5.10.1
v ≤ 5.10.1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_MISCx_refsource_CONFIRMThird Party AdvisoryUS Government Resource
https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04
x_refsource_CONFIRMProductVendor Advisory
https://www.silabs.com/developers/micrium-os

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMicscert
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-190

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