CVE-2026-17120: Vulnerabilities in IBM AIX and PowerVM VIOS

Q: What impact can an attacker achieve?

A remote attacker could cause a denial of service through a buffer overflow.

Q: Which products are identified as affected?

The affected software listed is IBM AIX and IBM PowerVM VIOS.

Published Aug 15, 2026

Updated

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to cause a denial of service due to a buffer overflow.

Affected Software

10 affected components

IBM AIX<=7.2

IBM AIX<=7.3

IBM PowerVM VIOS<=4.1

IBM VIOS>=4.1.0<4.1.0.50

IBM VIOS>=4.1.1.0<4.1.1.30

IBM VIOS>=4.1.2.0<4.1.2.20

IBM AIX>=7.2.5<=7.2.5.212

IBM AIX>=7.3.2<=7.3.2.5

IBM AIX>=7.3.3<=7.3.3.2

IBM AIX>=7.3.4<=7.3.4.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade IBM PowerVM VIOS 4.1 to a version that resolves this vulnerability.
Fixed in 4.1.0.50
Upgrade
Upgrade IBM PowerVM VIOS 4.1 to a version that resolves this vulnerability.
Fixed in 4.1.1.30
Upgrade
Upgrade IBM PowerVM VIOS 4.1 to a version that resolves this vulnerability.
Fixed in 4.1.2.20
Configuration
After applying the VIOS 4.1.0.50 or 4.1.1.30 FPs, perform the additional steps required to migrate to the latest Postgres15 (per the VIOS post-update instructions for 4.1.0.50 and 4.1.1.30).
IBM PowerVM VIOS 4.1.0 and VIOS 4.1.1 Postgres15 migration = required
Operational
Perform an LPAR reboot to complete the SP/FP update (AIX Service Pack / VIOS Fix Pack remediation requires an LPAR reboot).

Event History

Aug 15, 2026

CVE Published

via IBM·12:00 AM

Data Sourced

via IBM·12:00 AM

DescriptionAffected Software

Aug 20, 2026

CVE Published

via MITRE·09:51 PM

Data Sourced

via MITRE·09:51 PM

RemedyDescriptionSeverityWeakness

Data Sourced

via NVD·10:17 PM

RemedyDescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

IBM-7283858

Frequently Asked Questions

What impact can an attacker achieve?

A remote attacker could cause a denial of service through a buffer overflow.

Which products are identified as affected?

The affected software listed is IBM AIX and IBM PowerVM VIOS.

CVE-2026-17120: Vulnerabilities in IBM AIX and PowerVM VIOS

Affected Software

Remediation

Event History

Parent advisories

Frequently Asked Questions

What impact can an attacker achieve?

Which products are identified as affected?

Company

Resources

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