Ibm: >> Power System Ac922 (8335-Gth) Firmware >> op940 Security Vulnerabilities
IBM Power Systems Firmware FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware NVRAM parsing. An attacker with root access to a guest partition on an OpenPOWER system can write a specially crafted NVRAM image, causing the host firmware boot stage to crash with possible memory corruption. This condition persists until operator intervention — clearing NVRAM via the service processor — to restore normal operation. This vulnerability only affects OpenPOWER systems; systems running PowerVM are not affected. Successful exploitation results in an integrity and availability impact to the managed system.
CVSS Score
7.3
EPSS Score
0.001
Published
2026-08-19
IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 through OP940.81 (Power HMC) is affected by a vulnerability in the interface between the BMC/FSP and the host system. An attacker with service account or root access to the BMC/FSP can read and write arbitrary regions of host system memory, giving full control over the host system and all hosted partitions, resulting in a confidentiality, integrity, and availability impact.
CVSS Score
8.2
EPSS Score
0.001
Published
2026-08-19
IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware configuration parsing. An attacker with service-level access to the BMC/FSP can supply specially crafted configuration data, compromising the host firmware boot stage and everything subsequently loaded by it, resulting in a confidentiality, integrity, and availability impact to the managed system.
CVSS Score
8.2
EPSS Score
0.001
Published
2026-08-19
Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1, and OP940.00 - OP940.81 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the BMC/FSP can exploit this vulnerability, allowing arbitrary code to be executed in the host firmware runtime, giving full control over the managed system, resulting in a confidentiality, integrity, and availability impact to the managed system.
CVSS Score
8.2
EPSS Score
0.001
Published
2026-08-19
IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in the interface between the BMC/FSP and the host system. An attacker with service account or root access to the BMC/FSP can write arbitrary data to hardware control registers, allowing full control over the host system and all hosted partitions, resulting in a confidentiality, integrity, and availability impact.
CVSS Score
8.1
EPSS Score
0.001
Published
2026-08-19
IBM OpenBMC OP910 and OP940 could allow a privileged user to cause a denial of service by uploading or deleting too many CA certificates in a short period of time. IBM X-Force ID: 2226337.
CVSS Score
4.9
EPSS Score
0.005
Published
2022-12-12
IBM OPENBMC OP910 and OP940 could allow a privileged user to upload an improper site identity certificate that may cause it to lose network services. IBM X-Force ID: 207221.
CVSS Score
4.5
EPSS Score
0.004
Published
2022-08-22
IBM OPENBMC OP920, OP930, and OP940 could allow an unauthenticated user to obtain sensitive information. IBM X-Force ID: 212047.
CVSS Score
5.3
EPSS Score
0.011
Published
2022-02-04