CVE-2025-36194 in PowerVM Hypervisor
Summary
by MITRE • 02/03/2026
IBM PowerVM Hypervisor FW1110.00 through FW1110.03, FW1060.00 through FW1060.51, and FW950.00 through FW950.F0 may expose a limited amount of data to a peer partition in specific shared processor configurations during certain operations.
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Analysis
by VulDB Data Team • 02/19/2026
The vulnerability identified as CVE-2025-36194 affects IBM PowerVM hypervisor versions spanning multiple firmware releases including FW1110.00 through FW1110.03, FW1060.00 through FW1060.51, and FW950.00 through FW950.F0. This issue represents a significant security concern within virtualized environments where multiple partitions operate on shared hardware resources. The vulnerability manifests as a data exposure flaw that occurs during specific operations within shared processor configurations, creating potential pathways for unauthorized data access between virtual partitions. Such vulnerabilities are particularly dangerous in enterprise environments where sensitive data may be processed across multiple virtual machines sharing the same physical processor resources.
The technical flaw resides in the hypervisor's memory management and isolation mechanisms within shared processor environments. During specific operational sequences, the hypervisor fails to properly enforce memory boundaries between peer partitions, allowing limited data leakage between virtual environments. This represents a violation of the fundamental security principle of virtual machine isolation, where partitions should remain completely separated to prevent information disclosure. The vulnerability specifically impacts configurations where partitions share processor resources, making it particularly relevant to cloud computing environments and large-scale enterprise deployments. The flaw is categorized under CWE-200, which addresses "Information Exposure" in software systems, highlighting the core issue of unauthorized data access through improper isolation mechanisms.
The operational impact of this vulnerability extends beyond simple data leakage, potentially enabling sophisticated attacks that could compromise entire virtualized environments. Attackers with access to a peer partition could potentially extract sensitive information from other partitions, including cryptographic keys, authentication credentials, or proprietary business data. This vulnerability is particularly concerning in multi-tenant cloud environments where customers expect complete isolation of their virtual resources. The exposure affects not only the confidentiality of data but also the integrity and availability of services running across the shared processor infrastructure. Organizations relying on IBM PowerVM for mission-critical applications face potential regulatory compliance issues and reputational damage if this vulnerability is exploited successfully.
Mitigation strategies for CVE-2025-36194 should prioritize immediate firmware updates to the affected IBM PowerVM hypervisor versions. Organizations must implement comprehensive monitoring to detect any anomalous data access patterns that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1005, which involves "Data from Local System" and represents a classic information disclosure attack vector. Security teams should consider implementing additional network segmentation and access controls to limit the potential impact of any successful exploitation attempts. Regular vulnerability assessments and penetration testing of virtualized environments are essential to identify and remediate similar isolation flaws. Organizations should also review their incident response procedures to ensure preparedness for potential data exposure events. The remediation process must include thorough testing of updated firmware to ensure no regression in system functionality while maintaining the security enhancements required to address this specific vulnerability.