Out-of-bounds Read in IBM Power System E1050 \(9043-Mrx\) Firmware
CVE-2026-18870
IBM PowerVM Hypervisor FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, FW1060.00 through FW1060.81, and FW950.00 through FW950.H3 could allow a remote attacker to obtain sensitive information due to an out-of-bounds read.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (8.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.2% 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: 0.002 · change: 0.000
Affected products
- IBM Power System E1050 \(9043-Mrx\) Firmware
- IBM Power System E1080 \(9080-Hex\) Firmware
- IBM Power System E1150 \(9043-Mru\) Firmware
- IBM Power System E1180 \(9080-Heu\) Firmware
- IBM Power System E950 \(9040-Mr9\) Firmware
- IBM Power System E980 \(9080-M9s\) Firmware
- IBM Power System H922 \(9223-22s\) Firmware
- IBM Power System H924 \(9223-42s\) Firmware
- IBM Power System L1022 \(9786-22h\) Firmware
- IBM Power System L1024 \(9786-42h\) Firmware
Weakness classification (CWE)
References
- www.ibm.com/support/pages/node/7289135 (vendor-advisory, Patch, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-18870?
- CVE-2026-18870 is a medium-severity vulnerability in IBM Power System E1050 \(9043-Mrx\) Firmware, classified under Out-of-bounds Read. CVSS score: 4.3/10. Published 2026-09-24.
- How severe is CVE-2026-18870?
- Medium severity. CVSS v3 base score is 4.3 out of 10.