CVE-2021-30636: mediatek linkit_software_development_kit Integer Overflow or Wraparound

Vulnerability summary

CVE-2021-30636 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in mediatek linkit_software_development_kit. EPSS estimates a 1.47% chance of exploitation in the next 30 days, higher than 73.4% of scored vulnerabilities.

Timeline

1. 24-01-2022
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

In MediaTek LinkIt SDK before 4.6.1, there is a possible memory corruption due to an integer overflow during mishandled memory allocation by pvPortCalloc and pvPortRealloc.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.