CVE-2026-18832: Vulnerabilities in IBM AIX and PowerVM VIOS

Q: Which IBM products are identified as affected?

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

Q: Does exploitation require an attacker to have local access?

No. The issue is described as allowing a remote attacker to execute arbitrary code.

Published Aug 15, 2026

Updated

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to a heap-based 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 AIX 7.3 TL02/TL03/TL04 to a version that resolves this vulnerability.
Fixed in 7.3 TL04SP2
Upgrade
Upgrade IBM AIX 7.3 TL02/TL03/TL04 to a version that resolves this vulnerability.
Fixed in 7.3 TL03SP3
Upgrade
Upgrade IBM AIX 7.3 TL02/TL03/TL04 to a version that resolves this vulnerability.
Fixed in 7.3 TL02SP5
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_apar4.1.1
Upgrade
Upgrade IBM PowerVM VIOS 4.1.2 to a version that resolves this vulnerability.
Fixed in 4.1.2.20Patch key_w_apar4.1.2
Compensating control
Perform an LPAR reboot to complete the SP/FP update.
Operational
For VIOS 4.1.0 and VIOS 4.1.1, perform additional steps required to migrate to the latest Postgres15 after applying the 4.1.0.50 or 4.1.1.30 FPs.

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·10:01 PM

Data Sourced

via MITRE·10:01 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

Which IBM products are identified as affected?

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

Does exploitation require an attacker to have local access?

No. The issue is described as allowing a remote attacker to execute arbitrary code.

CVE-2026-18832: Vulnerabilities in IBM AIX and PowerVM VIOS

Affected Software

Remediation

Event History

Parent advisories

Frequently Asked Questions

Which IBM products are identified as affected?

Does exploitation require an attacker to have local access?

Company

Resources

Contact