CVE-2026-16931: IBM i is Affected By A Denial of Service Vulnerability []

Published Aug 11, 2026
·
Updated

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to improper handling of zero-length TCP options.

Other sources

IBM i could allow a remote attacker to cause a denial of service due to improper handling of zero-length TCP options.

— IBM

Affected Software

6 affected components
IBM IBM i>=7.3<=7.6
IBM i<=7.6
IBM i<=7.5
IBM i<=7.4
IBM i<=7.3
IBM i>=7.3<=7.6

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade IBM i 7.6 (5770-999) to a version that resolves this vulnerability.

    Fixed in 7.6Patch MJ10911
  2. Upgrade

    Upgrade IBM i 7.5 (5770-999) to a version that resolves this vulnerability.

    Fixed in 7.5Patch MJ10912
  3. Upgrade

    Upgrade IBM i 7.4 (5770-999) to a version that resolves this vulnerability.

    Fixed in 7.4Patch MJ10913
  4. Upgrade

    Upgrade IBM i 7.3 (5770-999) to a version that resolves this vulnerability.

    Fixed in 7.3Patch MJ10914

Event History

Aug 11, 2026
CVE Published
via IBM·12:00 AM
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software
Aug 12, 2026
CVE Published
via MITRE·05:27 PM
Data Sourced
via MITRE·05:27 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·06:17 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2026-16931?

The severity of CVE-2026-16931 is high, with a score of 7.5.

2

What software versions are affected by CVE-2026-16931?

CVE-2026-16931 affects IBM i versions 7.6, 7.5, 7.4, and 7.3.

3

What type of vulnerability is CVE-2026-16931?

CVE-2026-16931 is a denial of service vulnerability due to improper handling of zero-length TCP options.

4

How can CVE-2026-16931 be exploited?

CVE-2026-16931 can be exploited by a remote attacker to cause a denial of service.

5

What is the impact of CVE-2026-16931?

The impact of CVE-2026-16931 is the inability to access the affected IBM i systems due to a denial of service.

Company

Resources

Contact

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