CVE-2025-33132Network attack vector

Authenticated crash via pointer-size miscalculation

Published Oct 27, 2025 · Updated Oct 27, 2025

Pointer-size calculation error in IBM DB2 High Performance Unload allows remote authenticated users to crash the program over the network. A sizeof() operation measures a pointer rather than the referenced data, producing an incorrect size; IBM has not disclosed the affected function or input. Low-privileged product access is required, and the documented consequence is limited to availability loss from a program crash.

CVSS severity6.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Pointer-size calculation error in IBM DB2 High Performance Unload allows remote authenticated users to crash the program over the network. A sizeof() operation measures a pointer rather than the referenced data, producing an incorrect size; IBM has not disclosed the affected function or input. Low-privileged product access is required, and the documented consequence is limited to availability loss from a program crash.

The record

CVE
CVE-2025-33132
Published
Oct 27, 2025
Updated
Oct 27, 2025
Vendor
IBM
Product
IBM Db2 High Performance Unload for z/OS
Classifications
CWE-467, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 27, 2025Record 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=5.1
  2. Affected versionversion=5.1.0.1
  3. Affected versionversion=6.1
  4. Affected versionversion=6.1.0.1
  5. Affected versionversion=6.1.0.2
  6. Affected versionversion=6.1.0.3
  7. Affected versionversion=6.5
  8. Affected versionversion=6.5.0.0 IF1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM Db2 High Performance Unload for z/OSversion=5.1; version=5.1.0.1; version=6.1; version=6.1.0.1; version=6.1.0.2; version=6.1.0.3; version=6.5; version=6.5.0.0 IF1

Published CVSS scores

6.5IBM CorporationCVSS:3.1/AV:N/AC:L/PR:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-467Use of sizeof() on a Pointer Type
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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