CVE-2026-9171Network attack vector

Unauthenticated denial of service via memory exhaustion

Published Jul 17, 2026 · Updated Jul 17, 2026

Denial of service in IBM PowerVM NovaLink 2.2.0 through 2.2.1.1 and 2.3.0 through 2.3.2 allows remote attackers to exhaust memory. IBM identifies the vulnerable locus as the bundled WebSphere Liberty profile but has not disclosed which request-processing operation retains or allocates memory incorrectly. No authentication or user interaction is required, and the resulting memory exhaustion can interrupt the NovaLink management service.

CVSS severity7.5
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in IBM PowerVM NovaLink 2.2.0 through 2.2.1.1 and 2.3.0 through 2.3.2 allows remote attackers to exhaust memory. IBM identifies the vulnerable locus as the bundled WebSphere Liberty profile but has not disclosed which request-processing operation retains or allocates memory incorrectly. No authentication or user interaction is required, and the resulting memory exhaustion can interrupt the NovaLink management service.

The record

CVE
CVE-2026-9171
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
IBM
Product
PowerVM NovaLink
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.2.02.2.12.2.1.1
  2. Affected versionversion=2.3.02.3.0.12.3.12.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · PowerVM NovaLinkversion=2.2.02.2.12.2.1.1; version=2.3.02.3.0.12.3.12.3.2

Published CVSS scores

7.5IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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