CVE-2026-19280: IBM i buffer overflow in PASE process

CVE-2026-19280 · Severity: medium · CVSS 5.2 · Published 2026-09-14

IBM i is a core business application server platform used by enterprises to run mission-critical workloads. This vulnerability allows an authenticated user to crash their own session through a buffer overflow in the PASE (Portable Application Solutions Environment) subsystem, causing a denial of service. While the impact is limited to individual process termination, it affects multiple versions and requires prompt patching.

Technologies: IBM i. Vendors: IBM.

Quick answers

Is CVE-2026-19280 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-19280 being exploited in the wild.
How severe is CVE-2026-19280?
Medium severity, with a CVSS score of 5.2, published 14 September 2026.
Which products and versions are affected?
IBM i 7.3, 7.4, 7.5, 7.6.
Is there a fix for CVE-2026-19280?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-19280 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2026-19280?
Check whether you run IBM i at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

CVE-2026-19280 is an out-of-bounds write vulnerability (CWE-787) in the PASE process handling code within IBM i. The vulnerability requires local access and authenticated credentials to exploit; a user can trigger the buffer overflow to crash their own process. The attack vector is local with low complexity, and the impact results in availability loss and potential scope change to other components. IBM has released PTF patches for all affected versions (7.3–7.6) through their support portal.

Affected products

  • IBM IBM i 7.3, 7.4, 7.5, 7.6

Timeline

  • 2026-09-14: disclosed

References

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