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PatchSiren cyber security CVE debrief

CVE-2026-17195 IBM CVE debrief

A local attacker could cause a denial of service due to an out-of-bounds write in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. This vulnerability has a medium severity with a CVSS score of 6.5. The affected products are IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. Evidence is limited; primary official records indicate an out-of-bounds write vulnerability. Defensive verification tasks are recommended. Grounding from CVE and NVD suggests local attack vector with medium severity. Affected product scope appears limited but verification is needed for complete exposure assessment.

Vendor
IBM
Product
AIX
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-20
Original CVE updated
2026-08-21
Advisory published
2026-08-20
Advisory updated
2026-08-21

Who should care

System administrators and security teams responsible for IBM AIX and PowerVM VIOS systems should be aware of this vulnerability and prepare for potential remediation efforts. They must assess their environments for affected deployments and prioritize remediation based on operational impact and asset criticality. Vulnerability management and security teams should monitor for potential exploitation attempts and review system configurations for compliance with security best practices.

Technical summary

The vulnerability is due to an out-of-bounds write in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1, which could allow a local attacker to cause a denial of service. The CVSS score is 6.5, indicating a medium severity. The vulnerability affects IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. System administrators and security teams should review system configurations for compliance with security best practices and monitor for potential exploitation attempts.

Defensive priority

Medium priority due to local attack vector and denial of service impact.

Recommended defensive actions

  • Inventory affected systems and apply vendor remediation when available.
  • Implement compensating controls such as monitoring and exception tracking.
  • Verify system configurations and restrict local access to sensitive components.

Evidence notes

Evidence is limited; primary official records indicate an out-of-bounds write vulnerability in IBM AIX and PowerVM VIOS. Defensive verification tasks are recommended. Grounding from CVE and NVD suggests local attack vector with medium severity. Affected product scope appears limited but verification is needed for complete exposure assessment.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-17195 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-17195

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-17195 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-17195

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.