CVE-2026-17076Network attack vector

Unauthenticated service interruption via unbounded resource allocation

Published Aug 13, 2026 · Updated Aug 13, 2026

Resource exhaustion in IBM Power operating system releases 7.3 through 7.6 allows remote attackers to interrupt DRDA or DDM service. The request-processing path allocates resources without an identified limit, but IBM has not disclosed the exhausted resource or precise erroneous operation. No authentication or user interaction is required; the documented consequence is limited to DRDA or DDM availability, and the exact failure mode is undisclosed.

CVSS severity5.3
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in IBM Power operating system releases 7.3 through 7.6 allows remote attackers to interrupt DRDA or DDM service. The request-processing path allocates resources without an identified limit, but IBM has not disclosed the exhausted resource or precise erroneous operation. No authentication or user interaction is required; the documented consequence is limited to DRDA or DDM availability, and the exact failure mode is undisclosed.

The record

CVE
CVE-2026-17076
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
IBM
Product
IBM i
Classifications
CWE-770, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 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=7.3
  2. Affected versionversion=7.4
  3. Affected versionversion=7.5
  4. Affected versionversion=7.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM iversion=7.3; version=7.4; version=7.5; version=7.6

Published CVSS scores

5.3IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
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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