CVE-2026-17091: CWE-190 Integer Overflow or Wraparound in IBM PowerVM Hypervisor
CVE-2026-17091 is an integer overflow vulnerability in the IBM PowerVM Hypervisor call interface affecting multiple firmware versions. A root user in a guest partition can exploit this flaw by issuing a crafted hypervisor call to inject arbitrary data into hypervisor or partition memory. This can cause a crash leading to a full platform reboot and termination of all hosted partitions, or memory corruption. The hypervisor restarts automatically, but repeated exploitation may cause sustained availability issues. The vulnerability impacts system integrity and availability.
AI Analysis
Technical Summary
IBM PowerVM Hypervisor versions FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 contain an integer overflow or wraparound vulnerability (CWE-190) in the hypervisor call interface. An attacker with root privileges on a guest partition can craft a hypervisor call to inject arbitrary amounts of data into hypervisor or partition memory. This leads to either a crash causing a full platform re-initialization (IPL) and termination of all hosted partitions or corruption of memory. The hypervisor automatically restarts, but repeated exploitation can cause ongoing availability degradation. The vulnerability results in integrity and availability impacts to the managed system.
Potential Impact
Successful exploitation requires root access on a guest partition and can cause a full platform reboot terminating all hosted partitions or memory corruption within the hypervisor or partitions. This results in integrity and availability impacts. The hypervisor restarts automatically, but repeated exploitation may cause sustained availability issues.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time.
CVE-2026-17091: CWE-190 Integer Overflow or Wraparound in IBM PowerVM Hypervisor
Description
CVE-2026-17091 is an integer overflow vulnerability in the IBM PowerVM Hypervisor call interface affecting multiple firmware versions. A root user in a guest partition can exploit this flaw by issuing a crafted hypervisor call to inject arbitrary data into hypervisor or partition memory. This can cause a crash leading to a full platform reboot and termination of all hosted partitions, or memory corruption. The hypervisor restarts automatically, but repeated exploitation may cause sustained availability issues. The vulnerability impacts system integrity and availability.
CVSS v3.1
Score 8.4high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
IBM PowerVM Hypervisor versions FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 contain an integer overflow or wraparound vulnerability (CWE-190) in the hypervisor call interface. An attacker with root privileges on a guest partition can craft a hypervisor call to inject arbitrary amounts of data into hypervisor or partition memory. This leads to either a crash causing a full platform re-initialization (IPL) and termination of all hosted partitions or corruption of memory. The hypervisor automatically restarts, but repeated exploitation can cause ongoing availability degradation. The vulnerability results in integrity and availability impacts to the managed system.
Potential Impact
Successful exploitation requires root access on a guest partition and can cause a full platform reboot terminating all hosted partitions or memory corruption within the hypervisor or partitions. This results in integrity and availability impacts. The hypervisor restarts automatically, but repeated exploitation may cause sustained availability issues.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T14:46:42.523Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a86e0f8acd9273b4983859e
Added to database: 08/20/2026, 11:11:52 UTC
Last enriched: 08/20/2026, 11:16:26 UTC
Last updated: 08/20/2026, 11:32:00 UTC
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.