CVE-2026-93306: This Power System update is being released to address
IBM Server Firmware FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, FW1060.00 through FW1060.81, and FW950.00 through FW950.H3 is affected by a vulnerability in the ASMI web interface. An unauthenticated attacker on the management network can send a malformed HTTPS request to ASMI, causing the web server to crash with possible memory corruption and generate an error log. The ASMI web interface will restart automatically; however, repeated exploitation could result in a sustained loss of access to the ASMI management interface, resulting in an integrity and availability impact.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
IBM Power System firmware (ASMI)to a version that resolves this vulnerability.Fixed in FW1060.82Patch 1060_189 - Upgrade
Upgrade
IBM Power System firmware (ASMI)to a version that resolves this vulnerability.Fixed in FW1120.02Patch 1120_171 - Upgrade
Upgrade
IBM Power System firmware (ASMI)to a version that resolves this vulnerability.Fixed in FW1110.32Patch 1110_138 - Upgrade
Upgrade
IBM Power System firmware (ASMI)to a version that resolves this vulnerability.Fixed in FW950.H4Patch 950_236
Event History
Frequently Asked Questions
Who can exploit this issue?
An unauthenticated attacker with access to the management network can target the ASMI web interface. No valid ASMI credentials or user interaction are required.
What operational impact should administrators expect?
A malformed HTTPS request can crash the ASMI web server, which then restarts automatically and generates an error log. Repeated requests could sustain loss of access to the ASMI management interface and may cause integrity and availability impact.
Are systems affected by default network exposure?
Exposure depends on whether an attacker can reach the ASMI interface over the management network. The issue is triggered through HTTPS requests to ASMI, so restricting management-network access limits who can attempt exploitation.
How can administrators identify potentially affected systems?
Check the installed IBM Server Firmware version and ASMI error logs. Affected ranges are FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, FW1060.00 through FW1060.81, and FW950.00 through FW950.H3; exploitation can generate an error log and ASMI web-server restart.