CVE-2018-18438: qemu Integer Overflow or Wraparound

Vulnerability summary

CVE-2018-18438 is a medium (CVSS 5.5) Integer Overflow or Wraparound vulnerability in qemu. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 38.5% of scored vulnerabilities.

Timeline

1. 19-10-2018
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

Qemu has integer overflows because IOReadHandler and its associated functions use a signed integer data type for a size value.

• 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.