CVE-2020-4788

4.7 MEDIUM 0.4% exploit odds Fix listed

What it is

IBM Power9 (AIX 7.1, 7.2, and VIOS 3.1) processors could allow a local user to obtain sensitive information from the data in the L1 cache under extenuating circumstances. IBM X-Force ID: 189296.

At a glance

Exploitability: Can be exploited locally on the machine with a low-privilege account. High risk of data exposure.
Exploit odds: 0.4% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2020-11-20 04:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 03:20 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.4% in the next 30 days (EPSS).
Severity: 4.7 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2020-11-20 04:15 UTC
Last modified: 2026-06-17 03:20 UTC
Exploit probability: 0.4% · EPSS, next 30 days
Record status: Modified

Affected

IBM Vios 3.1.0
IBM Vios 3.1.1
IBM Vios 3.1.2
IBM Aix 7.1.0
IBM Aix 7.1.5
IBM Aix 7.2.0
IBM Aix 7.2.3
IBM Aix 7.2.4

Attack profile CVSS 3.1 · 4.7

Attack vector: Local
Complexity: High
Privileges needed: Low
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Raw vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2020-4788.md and follow it. Check whether this project is affected by CVE-2020-4788. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record