Security Bulletin: This Power System update is being released to address CVE-2026-18871

Summary Power Systems Firmware 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...

Security Bulletin: This Power System update is being released to address CVE-2026-16661

Summary Power Systems Firmware is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can exploit this vulnerability, allowing arbitrary code to be executed in the host firmware runtime, giving full control over th...

Security Bulletin: This Power System update is being released to address CVE-2026-16707

Summary Power Systems Firmware 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...

Security Bulletin: This Power System update is being released to address CVE-2026-17414

Summary Power Systems Firmware is affected by a vulnerability in partition firmware during network boot. An unauthenticated attacker with access to the same network as a partition performing a network boot can prevent that partition from completing its boot sequence. On partitions where OS secure...

Security Bulletin: This Power System update is being released to address CVE-2026-17028

Summary Power Systems Firmware is affected by a vulnerability in partition firmware during network boot. An unauthenticated attacker with access to the same network as a partition undergoing iSCSI SAN network boot can prevent that partition from completing its boot sequence. Other partitions and...

Security Bulletin: This Power System update is being released to address CVE-2026-18821

Summary 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...

Security Bulletin: This Power System update is being released to address CVE-2026-17097

Summary Power Systems Firmware is affected by a vulnerability in the PowerVM hypervisor call interface. An attacker with root access to a guest partition can issue a specially crafted hypervisor call causing a virtual processor to become permanently unresponsive, requiring a full platform re-IPL ...

Security Bulletin: This Power System update is being released to address CVE-2026-17091

Summary Power Systems Firmware is affected by a vulnerability in the PowerVM hypervisor call interface. An attacker with root access to a guest partition can issue a specially crafted hypervisor call to inject an arbitrary amount of data into hypervisor or partition memory, resulting in either a...

Security Bulletin: This Power System update is being released to address CVE-2026-15961

Summary IBM PowerVM could allow a local attacker to obtain sensitive information or cause a denial of service due to improper control of format strings. Vulnerability Details CVEID:CVE-2026-15961 DESCRIPTION: IBM PowerVM could allow a local attacker to obtain sensitive information or cause a deni...

Security Bulletin: This Power System update is being released to address CVE-2026-4936

Summary PowerVM Platform KeyStore PKS and virtual TPM use persistent storage key seeds that result in an AES key with reduced strength. An attacker with access to the service processor or HMC could exploit this weakness to derive the encryption key and access the data. Vulnerability Details...

PT-2026-83324

Name of the Vulnerable Software and Affected Versions IBM AIX version 7.2 IBM AIX version 7.3 IBM PowerVM VIOS version 4.1 Description A format string vulnerability exists that could allow a local attacker to gain elevated privileges. A format string vulnerability occurs when an application...

PT-2026-79246

Name of the Vulnerable Software and Affected Versions IBM AIX versions 7.2 and 7.3 IBM PowerVM VIOS version 4.1 Description Remote authenticated attackers can execute arbitrary commands due to improper neutralization of special elements used in an OS command. This issue occurs when the system fai...

Vulnerabilities in IBM AIX and PowerVM VIOS

IBM SECURITY ADVISORY First Issued: Fri Aug 14 20:25:19 CDT 2026 Updated: Fri Aug 21 10:35:27 CDT 2026 Update: Updated the summary to highlight the additional installation instructions. The most recent version of this document is available here:...

CVE-2026-11885

IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H1 A carefully crafted OS hypervisor call can cause the PowerVM hypervisor to crash or compromise OS memory integrity...

CVE-2026-11885

IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H1 A carefully crafted OS hypervisor call can cause the PowerVM hypervisor to crash or compromise OS memory integrity...

EUVD-2026-51238

IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H1 A carefully crafted OS hypervisor call can cause the PowerVM hypervisor to crash or compromise OS memory integrity...

CVE-2026-11885 Power System update in Buffer Copy

IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H1 A carefully crafted OS hypervisor call can cause the PowerVM hypervisor to crash or compromise OS memory integrity...

CVE-2026-11885

CVE-2026-11885 affects IBM PowerVM Hypervisor. A crafted OS hypervisor call can crash the hypervisor or compromise OS memory integrity. Affected firmware: FW1110.00–FW1110.20, FW1060.00–FW1060.71, and FW950.00–FW950.H1. Root cause cited as CWE-120 (Buffer Copy without Checking Size of Input). Rem...

CVE-2026-11885 Power System update in Buffer Copy

IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H1 A carefully crafted OS hypervisor call can cause the PowerVM hypervisor to crash or compromise OS memory integrity...

CVE-2026-4932

IBM PowerVM Hypervisor FW1110.00 through FW1110.20, and FW1060.00 through FW1060.71 could allow an attacker with physical access to the Transparent Memory Encryption TME hardware to decrypt encrypted memory due to insufficient cryptographic entropy...