How severe is CVE-2021-26706?

This vulnerability has a severity rating of CRITICAL with a CVSS score of 9.8 out of 10.

What type of vulnerability is CVE-2021-26706?

This is classified as CWE-190, which is a common weakness in software security.

CVE-2021-26706 - CRITICAL Severity | CVSS 9.8

Vulnerability Description

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.

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