CVE-2026-18871
Power System Buffer Overflow
CVSS Score
7.3
EPSS Score
0.0%
EPSS Percentile
0th
IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, and FW1060.00 through FW1060.80 is affected by a vulnerability in host firmware configuration parsing. An attacker with authenticated service-level access to the service processor can write specially crafted configuration data, causing the host firmware boot stack to crash with possible memory corruption during system initialisation, resulting in an integrity and availability impact to the managed system.
| CWE | CWE-121 |
| Vendor | ibm |
| Product | powervm hypervisor |
| Published | Aug 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
High
Affected Versions
IBM / PowerVM Hypervisor
FW1120.00 FW1110.00 ≤ FW1110.30 FW1060.00 ≤ FW1060.80