# CVE-2026-19234: IBM Power Systems Firmware stack-based buffer overflow in boot image validation

Source: https://junglewise.ai/threats/cve-2026-19234-ibm-power-systems-firmware-stack-based-buffer-overflow-in-boot  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-19. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-19234 · Severity: high · CVSS 8.2 · Published 2026-08-19

IBM Power Systems use firmware to manage hardware boot and initialization processes. A vulnerability in the firmware boot image validation allows an attacker with service processor access to upload a malicious firmware update that executes arbitrary code on the affected system. This could lead to complete compromise of the system, affecting data confidentiality, system integrity, and operational availability.

Technologies: [IBM Power Systems Firmware](https://junglewise.ai/threats/technologies/power-systems-firmware). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-19234 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-19234 being exploited in the wild.

**How severe is CVE-2026-19234?** High severity, with a CVSS score of 8.2, published 19 August 2026.

**Which products and versions are affected?** IBM Power Systems Firmware FW1120.00, FW1110.00–FW1110.30, FW1060.00–FW1060.80.

**Is there a fix for CVE-2026-19234?** 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-2026-19234 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-19234?** Check whether you run IBM Power Systems Firmware 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

This vulnerability is a stack-based buffer overflow (CWE-121) in the host firmware boot process image validation path. An attacker with high-level service processor access can craft a malicious firmware code update image that bypasses validation checks and executes arbitrary code with system privileges. The attack requires local access to the service processor but no user interaction. Successful exploitation results in complete system compromise with impact to confidentiality, integrity, and availability. Patches are available via IBM Fix Central, with different firmware versions (FW1060.81+, FW1110.31+, FW1120.01+) for different Power system models.

## Affected products

- IBM Power Systems Firmware FW1120.00, FW1110.00–FW1110.30, FW1060.00–FW1060.80

## Timeline

- 2026-08-19: disclosed

## References

- [https://www.ibm.com/support/pages/node/7283221](https://www.ibm.com/support/pages/node/7283221)

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