TI-2026-71329 Aliases CVE-2026-96264 GHSA-jhfp-hm4v-fwgf

Stack buffer overflow in IBM Power Systems Firmware

LOW 36CWE-121Published 2026-10-12 · Updated 2026-10-13

Key facts

Attack vector: Local
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

IBM Power Systems Firmware FW1060.00 through FW1060.81 is affected. A buffer overflow (CWE-121) in the service processor mailbox interface lets a specially crafted mailbox message overwrite host firmware runtime attribute storage. An attacker with authenticated service-level access to the FSP can run arbitrary code in the host firmware runtime, gaining full access to the managed system's memory and hardware interfaces.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

IBM Power Systems Firmware FW1060.00 through FW1060.81 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can send a specially crafted mailbox message to overflow host firmware runtime attribute storage, allowing arbitrary code to be executed in the host firmware runtime. This gives the attacker full access to the managed system's memory and hardware interfaces, resulting in a confidentiality, integrity, and availability impact to the managed system.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00123 2nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
IBM	PowerVM Hypervisor	FW1060.00 – FW1060.81	—	No fix listed	CNA

PowerVM Hypervisor VendorIBM Affected FW1060.00 – FW1060.81 Fixed in — No fix listed CNA

CPE names CNA · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:ibm:powervm_hypervisor:fw1060.00:::::::*	fw1060.00	—	IBM
cpe:2.3:a:ibm:powervm_hypervisor:fw1060.00.0:::::::*	fw1060.00.0	—	IBM
cpe:2.3:a:ibm:powervm_hypervisor:fw1060.81:::::::*	fw1060.81	—	IBM
cpe:2.3:a:ibm:powervm_hypervisor:fw1060.81.0:::::::*	fw1060.81.0	—	IBM

cpe:2.3:a:ibm:powervm_hypervisor:fw1060.00:*:*:*:*:*:*:* Versions fw1060.00 — ·IBM
cpe:2.3:a:ibm:powervm_hypervisor:fw1060.00.0:*:*:*:*:*:*:* Versions fw1060.00.0 — ·IBM
cpe:2.3:a:ibm:powervm_hypervisor:fw1060.81:*:*:*:*:*:*:* Versions fw1060.81 — ·IBM
cpe:2.3:a:ibm:powervm_hypervisor:fw1060.81.0:*:*:*:*:*:*:* Versions fw1060.81.0 — ·IBM

Remediation

The sources list no fixed version for PowerVM Hypervisor.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

2026-10-12 Threatist record created from CVE-2026-96264
2026-10-13 Alias added: GHSA-jhfp-hm4v-fwgf
2026-10-13 CISA SSVC decision points changed
2026-10-13 Priority changed: MEDIUM → LOW
2026-10-13 CISA SSVC decision points changed

References

Patch 1

https://www.ibm.com/support/pages/node/7290126

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Sources

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