CVE-2026-17423: Vulnerabilities in IBM AIX and PowerVM VIOS

Q: Does exploitation require local access to the affected system?

No. The issue is described as exploitable by a remote attacker.

Q: Which IBM products are identified as affected?

IBM AIX and IBM PowerVM VIOS are listed.

Q: Does the available information identify affected versions or configuration prerequisites?

No affected version range or configuration prerequisite is 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 remote attacker to obtain sensitive information and cause a denial of service 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 4.1.0.50Patch key_w_apar
Upgrade
Upgrade IBM PowerVM VIOS to a version that resolves this vulnerability.
Fixed in 4.1.1.30Patch key_w_apar
Compensating control
After applying VIOS 4.1.0.50 or 4.1.1.30 FPs, perform the additional required steps to migrate to the latest Postgres15 for VIOS 4.1.0 and VIOS 4.1.1.
Operational
Reboot the LPAR to complete the SP/FP update (LPAR reboot is required to complete the SP/FP update).

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·09:58 PM

Data Sourced

via MITRE·09:58 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

Does exploitation require local access to the affected system?

No. The issue is described as exploitable by a remote attacker.

Which IBM products are identified as affected?

IBM AIX and IBM PowerVM VIOS are listed.

Does the available information identify affected versions or configuration prerequisites?

No affected version range or configuration prerequisite is provided in the available data.

CVE-2026-17423: Vulnerabilities in IBM AIX and PowerVM VIOS

Affected Software

Remediation

Event History

Parent advisories

Frequently Asked Questions

Does exploitation require local access to the affected system?

Which IBM products are identified as affected?

Does the available information identify affected versions or configuration prerequisites?

Company

Resources

Contact