CVE-2026-16819: Vulnerabilities in IBM AIX and PowerVM VIOS

Q: Who can exploit this issue?

A local attacker could exploit the race condition. The provided information does not indicate that remote access alone is sufficient.

Q: What impacts are described if exploitation succeeds?

Successful exploitation could cause a denial of service and compromise data integrity.

Q: Which products are identified as affected?

The issue is identified for 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 local attacker to cause a denial of service and compromise data integrity due to a time-of-check time-of-use race condition.

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 4.1.0 to a version that resolves this vulnerability.
Fixed in 4.1.0.50
Upgrade
Upgrade IBM PowerVM VIOS 4.1.1 to a version that resolves this vulnerability.
Fixed in 4.1.1.30Patch key_w_apar4.1.1IJ5956408/14/2026
Upgrade
Upgrade IBM PowerVM VIOS 4.1.2 to a version that resolves this vulnerability.
Fixed in 4.1.2.20Patch key_w_apar4.1.2IJ5956308/14/2026
Operational
An LPAR reboot is required to complete the SP/FP update (post-update instructions referenced for AIX/VIOS include the need to reboot an LPAR).

Event History

Aug 15, 2026

CVE Published

via IBM·12:00 AM

Data Sourced

via IBM·12:00 AM

DescriptionAffected Software

Aug 19, 2026

CVE Published

via MITRE·03:07 PM

Data Sourced

via MITRE·03:07 PM

RemedyDescriptionSeverityWeakness

Data Sourced

via NVD·04:17 PM

RemedyDescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

IBM-7283858

Frequently Asked Questions

Who can exploit this issue?

A local attacker could exploit the race condition. The provided information does not indicate that remote access alone is sufficient.

What impacts are described if exploitation succeeds?

Successful exploitation could cause a denial of service and compromise data integrity.

Which products are identified as affected?

The issue is identified for IBM AIX and IBM PowerVM VIOS.

CVE-2026-16819: Vulnerabilities in IBM AIX and PowerVM VIOS

Affected Software

Remediation

Event History

Parent advisories

Frequently Asked Questions

Who can exploit this issue?

What impacts are described if exploitation succeeds?

Which products are identified as affected?

Company

Resources

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