CVE-2026-16883: Vulnerabilities in IBM AIX and PowerVM VIOS

Q: Which IBM products should be reviewed for exposure?

The affected software list includes IBM AIX and IBM PowerVM VIOS.

Q: Does the available information identify fixed versions or a workaround?

No fixed versions, configuration mitigations, or workarounds are provided in the available data.

Published Aug 15, 2026

Updated

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to obtain sensitive information due to an out-of-bounds read.

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 to a version that resolves this vulnerability.
Fixed in 4.1.0.50
Upgrade
Upgrade IBM PowerVM VIOS to a version that resolves this vulnerability.
Fixed in 4.1.1.30
Upgrade
Upgrade IBM PowerVM VIOS to a version that resolves this vulnerability.
Fixed in 4.1.2.20
Compensating control
Migrate VIOS 4.1.0/4.1.1 to the latest Postgres15 after applying the 4.1.0.50 or 4.1.1.30 FPs (additional steps are required per the referenced VIOS post-update instructions).
Operational
Perform an LPAR reboot after completing the SP/FP update to complete the AIX/VIOS service pack/fix pack update.

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·07:44 PM

Data Sourced

via MITRE·07:44 PM

RemedyDescriptionSeverityWeakness

Data Sourced

via NVD·08:17 PM

RemedyDescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

IBM-7283858

Frequently Asked Questions

Which IBM products should be reviewed for exposure?

The affected software list includes IBM AIX and IBM PowerVM VIOS.

Does the available information identify fixed versions or a workaround?

No fixed versions, configuration mitigations, or workarounds are provided in the available data.

CVE-2026-16883: Vulnerabilities in IBM AIX and PowerVM VIOS

Affected Software

Remediation

Event History

Parent advisories

Frequently Asked Questions

Which IBM products should be reviewed for exposure?

Does the available information identify fixed versions or a workaround?

Company

Resources

Contact