Out-of-bounds Read in IBM Powervm Hypervisor
CVE-2026-17028
IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 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 the managed system are not affected. Only partitions actively performing an iSCSI SAN network boot are affected, resulting in an availability impact.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Ibm Powervm Hypervisor — versions FW1120.00
Weakness classification (CWE)
References
- psirt@us.ibm.com (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-17028?
- CVE-2026-17028 is a medium-severity vulnerability in IBM Powervm Hypervisor, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-08-19.
- How severe is CVE-2026-17028?
- Medium severity. CVSS v3 base score is 6.5 out of 10.