IBM AIX/PowerVM VIOS 4.1/7.2/7.3 Virtual SCSI Initiator Driver privileges management

Summaryinfo

A vulnerability, which was classified as very critical, has been found in IBM AIX and PowerVM VIOS 4.1/7.2/7.3. Affected by this issue is some unknown functionality of the component Virtual SCSI Initiator Driver. Performing a manipulation results in privileges management. This vulnerability was named CVE-2026-19442. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as very critical, was found in IBM AIX and PowerVM VIOS 4.1/7.2/7.3. This affects an unknown functionality of the component Virtual SCSI Initiator Driver. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 has a pointer validation flaw exists in the AIX Virtual SCSI (vSCSI) initiator driver. Successful exploitation may result in denial of service, privilege escalation, or full compromise of the client LPAR kernel.

The advisory is shared at ibm.com. This vulnerability is uniquely identified as CVE-2026-19442 since 08/10/2026. The exploitability is told to be easy. An attack has to be approached locally. Additional levels of successful authentication are necessary for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/21/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Operating System

Vendor

• IBM

Name

• AIX
• PowerVM VIOS

Version

• 4.1
• 7.2
• 7.3

License

• commercial

Website

• Vendor: https://www.ibm.com/

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