# CVE-2026-17165: IBM AIX and PowerVM VIOS NULL pointer dereference denial of service

Source: https://junglewise.ai/threats/cve-2026-17165-ibm-aix-and-powervm-vios-null-pointer-dereference-denial-of  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-20. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-17165 · Severity: high · CVSS 7.5 · Published 2026-08-20

IBM AIX and PowerVM VIOS are core operating system and virtualization components used to run business-critical applications in enterprise data centers. A remote attacker can cause these systems to crash by triggering a NULL pointer dereference, leading to service outages and business disruption without requiring authentication or special access.

Technologies: [IBM Aix](https://junglewise.ai/threats/technologies/aix), [IBM PowerVM VIOS](https://junglewise.ai/threats/technologies/powervm-vios). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-17165 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-17165 being exploited in the wild.

**How severe is CVE-2026-17165?** High severity, with a CVSS score of 7.5, published 20 August 2026.

**Which products and versions are affected?** IBM Aix 7.2, 7.3; IBM PowerVM VIOS 4.1.

**Is there a fix for CVE-2026-17165?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-17165 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-17165?** Check whether you run IBM Aix or IBM PowerVM VIOS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This vulnerability is a NULL pointer dereference in IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1 that allows a remote attacker to trigger a denial of service condition. The root cause involves improper null pointer validation in a network-accessible component, which can be exploited without authentication. An attacker can send a specially crafted remote request that causes the affected system to dereference a null pointer, resulting in a process crash or system hang. IBM has released security updates through Service Packs and Fix Packs for supported releases under active fix support.

## Affected products

- IBM AIX 7.2, 7.3
- IBM PowerVM VIOS 4.1

## Timeline

- 2026-08-20: disclosed
- 2026-08-21: advisory: IBM security bulletin updated with installation instructions

## References

- [https://www.ibm.com/support/pages/node/7283858](https://www.ibm.com/support/pages/node/7283858)

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