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CVE-2026-18821

Power System Out-of-bounds Write PUBLISHED

Description (CNA)

IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 Power Systems Firmware is affected by a vulnerability in partition firmware during network boot. An unauthenticated attacker on the same network as a partition undergoing network boot can send a malformed packet, allowing arbitrary code to be executed in the partition firmware and compromising everything subsequently loaded by that partition. Other partitions and the managed system are not affected. Only partitions actively performing a network boot are affected, resulting in a confidentiality, integrity, and availability impact.

Affected (CNA)

Vendor / productVersions
IBM / PowerVM Hypervisoraffected FW1120.00; affected FW1110.00 through FW1110.30; affected FW1060.00 through FW1060.80; affected FW950.00 through FW950.H2

CWE

CWE-787

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.