Powervm Hypervisor
Monthly
Platform KeyStore (PKS) and virtual TPM firmware in IBM PowerVM Hypervisor generate AES encryption keys from persistent storage seeds with insufficient entropy (CWE-331), reducing effective key strength below the intended security level. An adversary who already holds privileged access to the service processor or Hardware Management Console (HMC) can exploit this weakness to analytically derive the weakened AES key and decrypt data protected by those keys. No public exploit code has been identified and this vulnerability is absent from the CISA KEV catalog; IBM has issued a patch via advisory node 7283890.
Insufficient entropy in IBM PowerVM Hypervisor hypervisor calls enables a local administrator to decrypt encrypted data across affected firmware branches. Specific hypervisor API calls provide less randomness than the caller requests, weakening cryptographic operations that depend on that entropy pool. The CVSS scope-changed rating (S:C) indicates that exploitation can breach isolation boundaries, potentially exposing encrypted data belonging to guest partitions or other components beyond the attacker's own domain. No public exploit code or CISA KEV listing has been identified at time of analysis.
Partition firmware in IBM PowerVM Hypervisor across firmware streams FW950 through FW1120 is vulnerable to a denial-of-service attack during iSCSI SAN network boot. An unauthenticated attacker with adjacent-network access can disrupt the boot sequence of a target partition, preventing it from completing initialization while leaving all other partitions and the managed POWER system entirely unaffected. Patch available per vendor advisory; no public exploit code or CISA KEV listing has been identified at time of analysis.
IBM PowerVM Hypervisor across four firmware trains (FW950 through FW1120) exposes an integer overflow (CWE-190) in its hypervisor call interface that permits a guest partition root user to inject arbitrary quantities of data into hypervisor or co-resident partition memory. The scope change (S:C in CVSS) reflects that exploitation crosses the guest-hypervisor isolation boundary, enabling either a full platform re-IPL that terminates every co-hosted partition or silent corruption of hypervisor and partition memory. No public exploit has been identified at time of analysis, and IBM has released patches covering all affected firmware trains.
IBM PowerVM Hypervisor across firmware branches FW950 through FW1120 exposes a flaw in the hypervisor call (hcall) interface that allows a root-privileged guest partition user to permanently freeze a virtual processor by issuing a specially crafted hypervisor call, requiring a full platform re-IPL to restore operation - a platform-wide denial of service affecting all co-resident guest partitions. In a subset of cases, exploitation may also result in a small amount of data being written into hypervisor or partition memory, creating a limited integrity impact with no attacker-controlled targeting. No public exploit identified at time of analysis; IBM has released a patch via its support portal.
Remote code execution in IBM PowerVM Hypervisor partition firmware exposes Power Systems environments during network boot operations. An unauthenticated attacker positioned on the same adjacent network as a partition actively performing a network boot can send a malformed packet that triggers a CWE-787 out-of-bounds write, executing arbitrary code within the partition firmware and compromising everything the partition subsequently loads. Impact is scoped to the actively booting partition - other partitions and the managed system are explicitly unaffected. No public exploit or CISA KEV listing exists at time of analysis; EPSS is notably low at 0.19% (9th percentile), consistent with the narrow exploitation window.
Stack-based buffer overflow in IBM PowerVM Hypervisor's host firmware configuration parsing allows authenticated service-level access holders to crash the firmware boot stack with possible memory corruption during system initialization, impacting integrity and availability of the managed Power system. Affected firmware spans three release trains: FW1060.00-FW1060.80, FW1110.00-FW1110.30, and FW1120.00. No public exploit code has been identified and the vulnerability is not listed in CISA KEV; IBM has released a patch via advisory at https://www.ibm.com/support/pages/node/7283238.
Network boot exploitation in IBM PowerVM Hypervisor across firmware branches FW950, FW1060, FW1110, and FW1120 allows an unauthenticated attacker with adjacent-network access to disrupt or hijack the boot sequence of any partition performing a PXE/network boot. Under the default configuration where OS secure boot is disabled, the attacker can substitute the boot image entirely, compromising the OS and all subsequently loaded software for that partition. No active exploitation has been confirmed per SSVC and EPSS signals, but the default-configuration exposure and full partition compromise potential make this a meaningful priority for IBM Power Systems operators.
Remote code execution in IBM PowerVM Hypervisor firmware versions FW950 through FW1120 allows an attacker with authenticated service-level access to the Flexible Service Processor (FSP) to execute arbitrary code in the host firmware runtime and gain full control of the managed Power system. An integer overflow (CWE-190) in the service processor mailbox interface is the root cause, with CVSS scope change (S:C) reflecting that exploitation breaks out from the FSP boundary into the broader host firmware and managed-system context. No public exploit or CISA KEV listing exists at time of analysis; however, the combination of complete C/I/A impact and scope change makes this a high-priority patch target for any organization running affected IBM Power hardware.
IBM PowerVM Hypervisor across firmware branches FW1060, FW1110, and FW1120 contains a format string vulnerability (CWE-134) that enables a local attacker with high-privilege access to extract sensitive hypervisor memory or trigger a denial-of-service condition crashing the hypervisor and all hosted virtual machines. The attack requires local presence, high privileges, and high attack complexity, confining realistic risk to insider threat or post-compromise scenarios. No public exploit code or active exploitation has been identified at time of analysis; IBM has confirmed a patch is available.
OS memory integrity compromise and hypervisor denial of service in IBM PowerVM Hypervisor (firmware FW950, FW1060, and FW1110 families) allows a low-privileged actor inside a logical partition to issue a carefully crafted hypervisor call that crashes the PowerVM hypervisor or corrupts OS memory. Because the flaw crosses the partition-to-hypervisor trust boundary (CVSS scope change), a single guest partition can impact the integrity and availability of the shared virtualization layer serving other partitions. There is no public exploit identified at time of analysis, and the issue is not listed in CISA KEV; IBM, the reporter, has released a fix.
Physical access to IBM PowerVM Hypervisor firmware with Transparent Memory Encryption (TME) enabled can allow an attacker to decrypt protected memory contents due to insufficient entropy. This information disclosure vulnerability affects firmware versions FW1110.00–FW1110.20 and FW1060.00–FW1060.71, potentially exposing sensitive data stored in memory. No public exploit code or active exploitation evidence is available at the time of analysis.
Powervm Hypervisor versions up to fw950.00 contains a vulnerability that allows attackers to a local user with administration privileges to obtain sensitive information from (CVSS 6.0).
IBM PowerVM Hypervisor FW950.00 through FW950.E0, FW1050.00 through FW1050.50, and FW1060.00 through FW1060.40 could allow a local privileged user to cause a denial of service by issuing a specially. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. No vendor patch available.
IBM PowerVM Hypervisor FW1050.00 through FW1050.30 and FW1060.00 through FW1060.20 could allow a local user, under certain Linux processor combability mode configurations, to cause undetected data. Rated medium severity (CVSS 4.5), this vulnerability is no authentication required. No vendor patch available.
IBM PowerVM Platform KeyStore (IBM PowerVM Hypervisor FW950.00 through FW950.90, FW1030.00 through FW1030.60, FW1050.00 through FW1050.20, and FW1060.00 through FW1060.10 functionality can be. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
IBM PowerVM Hypervisor FW950.00 through FW950.71, FW1010.00 through FW1010.40, FW1020.00 through FW1020.20, and FW1030.00 through FW1030.11 could allow an attacker to obtain sensitive information if. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
IBM PowerVM Hypervisor FW860.00 through FW860.B3, FW950.00 through FW950.70, FW1010.00 through FW1010.50, FW1020.00 through FW1020.30, and FW1030.00 through FW1030.10 could allow a local attacker. Rated high severity (CVSS 7.9), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An internally discovered vulnerability in PowerVM on IBM Power9 and Power10 systems could allow an attacker with privileged user access to a logical partition to perform an undetected violation of. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. No vendor patch available.
After performing a sequence of Power FW950, FW1010 maintenance operations a SRIOV network adapter can be improperly configured leading to desired VEPA configuration being disabled. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An attacker that gains service access to the FSP (POWER9 only) or gains admin authority to a partition can compromise partition firmware. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
IBM PowerVM Hypervisor FW940, FW950, and FW1010 could allow an authenticated user to cause the system to crash using a specially crafted IBMi Hypervisor call. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
IBM PowerVM Hypervisor FW860, FW940, and FW950 could allow an attacker that gains service access to the FSP can read and write arbitrary host system memory through a series of carefully crafted. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
IBM PowerVM Hypervisor FW860, FW930, FW940, and FW950 could allow a local user to create a specially crafted sequence of hypervisor calls from a partition that could crash the system. Rated medium severity (CVSS 6.0), this vulnerability is low attack complexity.
The PowerVM Logical Partition Mobility(LPM) (PowerVM Hypervisor FW920, FW930, FW940, and FW950) encryption key exchange protocol can be compromised. Rated medium severity (CVSS 4.4), this vulnerability is remotely exploitable. No vendor patch available.
Platform KeyStore (PKS) and virtual TPM firmware in IBM PowerVM Hypervisor generate AES encryption keys from persistent storage seeds with insufficient entropy (CWE-331), reducing effective key strength below the intended security level. An adversary who already holds privileged access to the service processor or Hardware Management Console (HMC) can exploit this weakness to analytically derive the weakened AES key and decrypt data protected by those keys. No public exploit code has been identified and this vulnerability is absent from the CISA KEV catalog; IBM has issued a patch via advisory node 7283890.
Insufficient entropy in IBM PowerVM Hypervisor hypervisor calls enables a local administrator to decrypt encrypted data across affected firmware branches. Specific hypervisor API calls provide less randomness than the caller requests, weakening cryptographic operations that depend on that entropy pool. The CVSS scope-changed rating (S:C) indicates that exploitation can breach isolation boundaries, potentially exposing encrypted data belonging to guest partitions or other components beyond the attacker's own domain. No public exploit code or CISA KEV listing has been identified at time of analysis.
Partition firmware in IBM PowerVM Hypervisor across firmware streams FW950 through FW1120 is vulnerable to a denial-of-service attack during iSCSI SAN network boot. An unauthenticated attacker with adjacent-network access can disrupt the boot sequence of a target partition, preventing it from completing initialization while leaving all other partitions and the managed POWER system entirely unaffected. Patch available per vendor advisory; no public exploit code or CISA KEV listing has been identified at time of analysis.
IBM PowerVM Hypervisor across four firmware trains (FW950 through FW1120) exposes an integer overflow (CWE-190) in its hypervisor call interface that permits a guest partition root user to inject arbitrary quantities of data into hypervisor or co-resident partition memory. The scope change (S:C in CVSS) reflects that exploitation crosses the guest-hypervisor isolation boundary, enabling either a full platform re-IPL that terminates every co-hosted partition or silent corruption of hypervisor and partition memory. No public exploit has been identified at time of analysis, and IBM has released patches covering all affected firmware trains.
IBM PowerVM Hypervisor across firmware branches FW950 through FW1120 exposes a flaw in the hypervisor call (hcall) interface that allows a root-privileged guest partition user to permanently freeze a virtual processor by issuing a specially crafted hypervisor call, requiring a full platform re-IPL to restore operation - a platform-wide denial of service affecting all co-resident guest partitions. In a subset of cases, exploitation may also result in a small amount of data being written into hypervisor or partition memory, creating a limited integrity impact with no attacker-controlled targeting. No public exploit identified at time of analysis; IBM has released a patch via its support portal.
Remote code execution in IBM PowerVM Hypervisor partition firmware exposes Power Systems environments during network boot operations. An unauthenticated attacker positioned on the same adjacent network as a partition actively performing a network boot can send a malformed packet that triggers a CWE-787 out-of-bounds write, executing arbitrary code within the partition firmware and compromising everything the partition subsequently loads. Impact is scoped to the actively booting partition - other partitions and the managed system are explicitly unaffected. No public exploit or CISA KEV listing exists at time of analysis; EPSS is notably low at 0.19% (9th percentile), consistent with the narrow exploitation window.
Stack-based buffer overflow in IBM PowerVM Hypervisor's host firmware configuration parsing allows authenticated service-level access holders to crash the firmware boot stack with possible memory corruption during system initialization, impacting integrity and availability of the managed Power system. Affected firmware spans three release trains: FW1060.00-FW1060.80, FW1110.00-FW1110.30, and FW1120.00. No public exploit code has been identified and the vulnerability is not listed in CISA KEV; IBM has released a patch via advisory at https://www.ibm.com/support/pages/node/7283238.
Network boot exploitation in IBM PowerVM Hypervisor across firmware branches FW950, FW1060, FW1110, and FW1120 allows an unauthenticated attacker with adjacent-network access to disrupt or hijack the boot sequence of any partition performing a PXE/network boot. Under the default configuration where OS secure boot is disabled, the attacker can substitute the boot image entirely, compromising the OS and all subsequently loaded software for that partition. No active exploitation has been confirmed per SSVC and EPSS signals, but the default-configuration exposure and full partition compromise potential make this a meaningful priority for IBM Power Systems operators.
Remote code execution in IBM PowerVM Hypervisor firmware versions FW950 through FW1120 allows an attacker with authenticated service-level access to the Flexible Service Processor (FSP) to execute arbitrary code in the host firmware runtime and gain full control of the managed Power system. An integer overflow (CWE-190) in the service processor mailbox interface is the root cause, with CVSS scope change (S:C) reflecting that exploitation breaks out from the FSP boundary into the broader host firmware and managed-system context. No public exploit or CISA KEV listing exists at time of analysis; however, the combination of complete C/I/A impact and scope change makes this a high-priority patch target for any organization running affected IBM Power hardware.
IBM PowerVM Hypervisor across firmware branches FW1060, FW1110, and FW1120 contains a format string vulnerability (CWE-134) that enables a local attacker with high-privilege access to extract sensitive hypervisor memory or trigger a denial-of-service condition crashing the hypervisor and all hosted virtual machines. The attack requires local presence, high privileges, and high attack complexity, confining realistic risk to insider threat or post-compromise scenarios. No public exploit code or active exploitation has been identified at time of analysis; IBM has confirmed a patch is available.
OS memory integrity compromise and hypervisor denial of service in IBM PowerVM Hypervisor (firmware FW950, FW1060, and FW1110 families) allows a low-privileged actor inside a logical partition to issue a carefully crafted hypervisor call that crashes the PowerVM hypervisor or corrupts OS memory. Because the flaw crosses the partition-to-hypervisor trust boundary (CVSS scope change), a single guest partition can impact the integrity and availability of the shared virtualization layer serving other partitions. There is no public exploit identified at time of analysis, and the issue is not listed in CISA KEV; IBM, the reporter, has released a fix.
Physical access to IBM PowerVM Hypervisor firmware with Transparent Memory Encryption (TME) enabled can allow an attacker to decrypt protected memory contents due to insufficient entropy. This information disclosure vulnerability affects firmware versions FW1110.00–FW1110.20 and FW1060.00–FW1060.71, potentially exposing sensitive data stored in memory. No public exploit code or active exploitation evidence is available at the time of analysis.
Powervm Hypervisor versions up to fw950.00 contains a vulnerability that allows attackers to a local user with administration privileges to obtain sensitive information from (CVSS 6.0).
IBM PowerVM Hypervisor FW950.00 through FW950.E0, FW1050.00 through FW1050.50, and FW1060.00 through FW1060.40 could allow a local privileged user to cause a denial of service by issuing a specially. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. No vendor patch available.
IBM PowerVM Hypervisor FW1050.00 through FW1050.30 and FW1060.00 through FW1060.20 could allow a local user, under certain Linux processor combability mode configurations, to cause undetected data. Rated medium severity (CVSS 4.5), this vulnerability is no authentication required. No vendor patch available.
IBM PowerVM Platform KeyStore (IBM PowerVM Hypervisor FW950.00 through FW950.90, FW1030.00 through FW1030.60, FW1050.00 through FW1050.20, and FW1060.00 through FW1060.10 functionality can be. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
IBM PowerVM Hypervisor FW950.00 through FW950.71, FW1010.00 through FW1010.40, FW1020.00 through FW1020.20, and FW1030.00 through FW1030.11 could allow an attacker to obtain sensitive information if. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
IBM PowerVM Hypervisor FW860.00 through FW860.B3, FW950.00 through FW950.70, FW1010.00 through FW1010.50, FW1020.00 through FW1020.30, and FW1030.00 through FW1030.10 could allow a local attacker. Rated high severity (CVSS 7.9), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An internally discovered vulnerability in PowerVM on IBM Power9 and Power10 systems could allow an attacker with privileged user access to a logical partition to perform an undetected violation of. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. No vendor patch available.
After performing a sequence of Power FW950, FW1010 maintenance operations a SRIOV network adapter can be improperly configured leading to desired VEPA configuration being disabled. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An attacker that gains service access to the FSP (POWER9 only) or gains admin authority to a partition can compromise partition firmware. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
IBM PowerVM Hypervisor FW940, FW950, and FW1010 could allow an authenticated user to cause the system to crash using a specially crafted IBMi Hypervisor call. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
IBM PowerVM Hypervisor FW860, FW940, and FW950 could allow an attacker that gains service access to the FSP can read and write arbitrary host system memory through a series of carefully crafted. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
IBM PowerVM Hypervisor FW860, FW930, FW940, and FW950 could allow a local user to create a specially crafted sequence of hypervisor calls from a partition that could crash the system. Rated medium severity (CVSS 6.0), this vulnerability is low attack complexity.
The PowerVM Logical Partition Mobility(LPM) (PowerVM Hypervisor FW920, FW930, FW940, and FW950) encryption key exchange protocol can be compromised. Rated medium severity (CVSS 4.4), this vulnerability is remotely exploitable. No vendor patch available.