CVE-2026-18671: IBM i is Affected By Multiple Vulnerabilities in NetServer

Published Aug 12, 2026
·
Updated

IBM i 7.6, 7.5, 7.4, and 7.3 could allow an authenticated attacker to force a NetServer server thread exception, caused by an integer overflow during bounds checking in request processing. The attacker could exploit this vulnerability to cause a temporary denial of service.

Other sources

IBM i could allow an authenticated attacker to force a NetServer server thread exception, caused by an integer overflow during bounds checking in request processing. The attacker could exploit this vulnerability to cause a temporary denial of service.

— IBM

Affected Software

4 affected components
IBM i<=7.6
IBM i<=7.5
IBM i<=7.4
IBM i<=7.3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade IBM i (NetServer) to a version that resolves this vulnerability.

    Fixed in 7.6Patch MJ10939
  2. Upgrade

    Upgrade IBM i (NetServer) to a version that resolves this vulnerability.

    Fixed in 7.5Patch MJ10938
  3. Upgrade

    Upgrade IBM i (NetServer) to a version that resolves this vulnerability.

    Fixed in 7.4Patch MJ10937
  4. Upgrade

    Upgrade IBM i (NetServer) to a version that resolves this vulnerability.

    Fixed in 7.3Patch MJ10936

Event History

Aug 12, 2026
CVE Published
via IBM·12:00 AM
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software
Aug 13, 2026
CVE Published
via MITRE·08:46 PM
Data Sourced
via MITRE·08:46 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·09:17 PM
DescriptionSeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

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