# CVE-2026-17195: IBM AIX and PowerVM VIOS out-of-bounds write denial of service

Source: https://junglewise.ai/threats/cve-2026-17195-ibm-aix-and-powervm-vios-out-of-bounds-write-denial-of-service  
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-2026-17195 · Severity: medium · CVSS 6.5 · Published 2026-08-20

IBM AIX 7.2, 7.3 and PowerVM VIOS 4.1 contain an out-of-bounds write vulnerability that allows local attackers to crash the system or cause service disruptions. This affects the core operating systems used to manage enterprise virtualization and data center infrastructure, potentially impacting business continuity and operational availability.

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-2026-17195 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-17195 being exploited in the wild.

**How severe is CVE-2026-17195?** Medium severity, with a CVSS score of 6.5, 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-2026-17195?** 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-2026-17195 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-17195?** 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 an out-of-bounds write issue in IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1 that can be exploited by a local attacker with limited privileges. The attack requires local access and no user interaction. Successful exploitation results in denial of service through system crash or service termination. IBM has released security updates via Service Packs (SPs) and Fix Packs (FPs) to remediate this vulnerability; customers should apply these updates promptly as recommended in the security bulletin.

## 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 additional installation instructions

## References

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

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