CVE-2026-16839
Received Received - Intake

Integer Underflow in IBM AIX and PowerVM VIOS IPv4 Parser

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: IBM Corporation

Description
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to obtain sensitive information due to an integer underflow in the IPv4 IP-options parser.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-19
Last Modified
2026-08-19
Generated
2026-08-20
AI Q&A
2026-08-19
EPSS Evaluated
N/A
NVD
CVE-2026-16839
EUVD
EUVD-2026-62728

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
ibm aix 7.2
ibm aix 7.3
ibm powervm_vios 4.1
ibm aix From 7.2 (inc)
ibm aix From 7.3 (inc)
ibm powervm_vios From 4.1 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is an integer underflow in the IPv4 IP-options parser of IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It allows a remote attacker to obtain sensitive information by exploiting this flaw.

Impact Analysis

The vulnerability can lead to unauthorized access to sensitive information due to the integer underflow. Attackers may exploit it to read or manipulate data, potentially causing data breaches or system compromise.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating GDPR and HIPAA compliance. Organizations may face legal penalties, reputational damage, and loss of trust due to potential data breaches.

Mitigation Strategies

Apply IBM AIX and PowerVM VIOS security patches as soon as they are available. Monitor IBM PSIRT advisories for updates and restrict network access to vulnerable systems until patched.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-16839. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart