CVE-2026-17272

Analyzed Analyzed - Analysis Complete

Buffer Overflow in IBM i

Publication date: 2026-08-13

Last updated on: 2026-08-19

Assigner: IBM Corporation

Description

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to a buffer overflow.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-13

Last Modified

2026-08-19

Generated

2026-09-03

AI Q&A

2026-08-14

EPSS Evaluated

2026-09-01

NVD

CVE-2026-17272

EUVD

EUVD-2026-58404

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	i	7.3
ibm	i	7.4
ibm	i	7.5
ibm	i	7.6

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is a buffer overflow vulnerability in IBM i versions 7.6, 7.5, 7.4, and 7.3. A remote attacker could exploit it to cause a denial of service by sending specially crafted input that exceeds buffer limits.

Detection Guidance

This vulnerability is specific to IBM i systems and involves a buffer overflow that could lead to denial of service. Detection requires checking IBM i system logs for unusual activity or crashes. Commands like DSPLOG for viewing logs or WRKACTJOB to monitor active jobs may help identify suspicious behavior. Ensure IBM i is updated to the latest fixes from IBM.

Impact Analysis

The vulnerability allows an attacker to crash the system remotely, disrupting services. It may also enable limited unauthorized access or data manipulation, depending on system configuration.

Compliance Impact

This denial of service vulnerability could lead to service disruptions, potentially violating availability requirements in GDPR and HIPAA. Unauthorized access risks may also impact data integrity and confidentiality obligations.

Mitigation Strategies

Apply the latest IBM i PTFs or updates provided by IBM to address the buffer overflow issue. Monitor IBM security bulletins for patches and test them in a non-production environment before deployment.

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