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Vulnerability details

CVE-2026-96265

IBM PowerVM Hypervisor

IBM Power Systems Firmware Improper Memory Buffer Restriction

CVSS 3.1
8.2High

Official description

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 read or modify arbitrary regions of Hostboot memory, compromising the host firmware boot stack and the hypervisor subsequently loaded by it. Successful exploitation results in a confidentiality, integrity, and availability impact to the managed system.

CVSS scores

ScoreVersionSourceVector
8.2High 3.1 CVEProject cvelistV5 (CNA) (ibm) CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

VendorProductVersionsSource
IBM PowerVM Hypervisor FW1060.00 ≤ v ≤ FW1060.81 CVEProject cvelistV5 (CNA)

References and advisories

1
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Details

Published
2026-10-13
Last updated
2026-10-13
State
Published
Assigner (CNA)
ibm

Exploit prediction (EPSS)

0.12%
Probability of exploitation in 30 days
2.1%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-119
    Improper Restriction of Operations within the Bounds of a Memory Buffer