CVE-2026-17270
Received Received - Intake

Stack-Based Buffer Overflow in IBM i

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: IBM Corporation

Description
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to cause a denial of service due to a stack-based buffer overflow.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-05
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-17270
EUVD
EUVD-2026-71478

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
ibm i 7.6
ibm i 7.5
ibm i 7.4
ibm i 7.3

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

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Executive Summary

This is a stack-based buffer overflow vulnerability in IBM i operating systems versions 7.6, 7.5, 7.4, and 7.3. A local attacker could exploit this to cause a denial of service by overflowing a buffer on the stack.

Impact Analysis

A local attacker could exploit this to crash the system, causing service disruption. Since it requires local access, remote exploitation is not possible. The impact is limited to availability of the affected IBM i system.

Mitigation Strategies

Apply IBM i PTFs or updates provided by IBM to address the stack-based buffer overflow issue. Monitor IBM PSIRT advisories for patches and test fixes in a non-production environment before deployment.

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