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TI-2021-08385 Aliases CVE-2021-26706GHSA-7j9p-4w63-5mq8

An issue was discovered in lib_mem.c in Micrium uC/OS uC/LIB 1.38.x and 1.39.00.

Priority MEDIUM 46CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

An issue was discovered in lib_mem.c in Micrium uC/OS uC/LIB 1.38.x and 1.39.00. The following memory allocation functions do not check for integer overflow when allocating a pool whose size exceeds the address space: Mem_PoolCreate, Mem_DynPoolCreate, and Mem_DynPoolCreateHW. Because these functions use multiplication to calculate the pool sizes, the operation may cause an integer overflow if the arguments are large enough. The resulting memory pool will be smaller than expected and may be exploited by an attacker.

Why it matters now

EPSS 0.01939 80th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:micrium:uc\/lib:1.38.00:*:*:*:*:*:*:*1.38.00VulnerableMicrium
cpe:2.3:a:micrium:uc\/lib:1.38.01:*:*:*:*:*:*:*1.38.01VulnerableMicrium
cpe:2.3:a:micrium:uc\/lib:1.38.02:*:*:*:*:*:*:*1.38.02VulnerableMicrium
cpe:2.3:a:micrium:uc\/lib:1.38.03:*:*:*:*:*:*:*1.38.03VulnerableMicrium
cpe:2.3:a:micrium:uc\/lib:1.38.04:*:*:*:*:*:*:*1.38.04VulnerableMicrium
cpe:2.3:a:micrium:uc\/lib:1.38.05:*:*:*:*:*:*:*1.38.05VulnerableMicrium
cpe:2.3:a:micrium:uc\/lib:1.39.00:*:*:*:*:*:*:*1.39.00VulnerableMicrium
  • cpe:2.3:a:micrium:uc\/lib:1.38.00:*:*:*:*:*:*:* Versions 1.38.00 Vulnerable ·Micrium
  • cpe:2.3:a:micrium:uc\/lib:1.38.01:*:*:*:*:*:*:* Versions 1.38.01 Vulnerable ·Micrium
  • cpe:2.3:a:micrium:uc\/lib:1.38.02:*:*:*:*:*:*:* Versions 1.38.02 Vulnerable ·Micrium
  • cpe:2.3:a:micrium:uc\/lib:1.38.03:*:*:*:*:*:*:* Versions 1.38.03 Vulnerable ·Micrium
  • cpe:2.3:a:micrium:uc\/lib:1.38.04:*:*:*:*:*:*:* Versions 1.38.04 Vulnerable ·Micrium
  • cpe:2.3:a:micrium:uc\/lib:1.38.05:*:*:*:*:*:*:* Versions 1.38.05 Vulnerable ·Micrium
  • cpe:2.3:a:micrium:uc\/lib:1.39.00:*:*:*:*:*:*:* Versions 1.39.00 Vulnerable ·Micrium

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-26706
  2. 2026-10-03 Alias added: GHSA-7j9p-4w63-5mq8

References

Advisory 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences