What is CVE-2026-17028?

CVE-2026-17028 is a medium-severity vulnerability in IBM Power System E1050 \(9043-Mrx\) Firmware, 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.

Out-of-bounds Read in IBM Power System E1050 \(9043-Mrx\) Firmware

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

Published 2026-08-19 · last modified 2026-08-25.

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.

EPSS exploit prediction

EPSS: 0.003 (18.6th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

www.ibm.com/support/pages/node/7283233 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-17028?: CVE-2026-17028 is a medium-severity vulnerability in IBM Power System E1050 \(9043-Mrx\) Firmware, 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.