Micrium OS Integer Overflow or Wraparound
Priority LOW 37CWE-190Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00886 59th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Micrium | Micrium OS | up to 5.10.1 | — | No fix listed | CNA |
- Micrium OS VendorMicrium Affected up to 5.10.1 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:silabs:micrium_os:*:*:*:*:*:*:*:* | up to 5.10.1 | Vulnerable | silabs.com |
- cpe:2.3:o:silabs:micrium_os:*:*:*:*:*:*:*:* Versions up to 5.10.1 Vulnerable ·silabs.com
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-27411
- 2026-10-03 Alias added: GHSA-823g-7fp8-5vqm
References
More Micrium vulnerabilities
- TI-2021-08385 An issue was discovered in lib_mem.c in Micrium uC/OS uC/LIB 1.38.x and 1.39.00. CVSS 3.1CRITICAL 9.8
- TI-2020-10661 NULL pointer dereference in Micrium CVSS 3.1HIGH 7.5
Sources
- CVE-2021-27411 · CVE Program
- CVE-2021-27411 · NVD
- FIRST EPSS
- GHSA-823g-7fp8-5vqm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences