CVE-2026-18671 PUBLISHED

IBM i is Affected By Multiple Vulnerabilities in NetServer

Assigner: ibm
Reserved: 03.08.2026 Published: 13.08.2026 Updated: 13.08.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CVSS Score: 6.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	IBM
Product	i
Versions	Version 7.6 is affected Version 7.5 is affected Version 7.4 is affected Version 7.3 is affected

Solutions

IBM strongly recommends addressing the vulnerability now.

IBM i Release5770-999 PTF Number(s)PTF Download Link(s)7.6MJ10939 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10939 7.5MJ10938 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10938 7.4MJ10937 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10937 7.3MJ10936 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10936

IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.

References

https://www.ibm.com/support/pages/node/7283573

Problem Types

CWE-190 Integer Overflow or Wraparound CWE