CVE-2020-4756: IBM Elastic Storage Server

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

IBM Spectrum Scale V4.2.0.0 through V4.2.3.23 and V5.0.0.0 through V5.0.5.2 as well as IBM Elastic Storage System 6.0.0 through 6.0.1.0 could allow a local attacker to invoke a subset of ioctls on the device with invalid arguments that could crash the keneral and cause a denial of service. IBM X-Force ID: 188599.

Affected products

• IBM Elastic Storage Server: from 6.0.0.0, up to and including 6.0.1.0
• IBM Spectrum Scale: after 4.2.0.0, up to and including 4.2.3.23; after 5.0.0.0, up to and including 5.0.5.2

Published 2020-10-20. Last modified 2026-06-17.