Buffer overflow in IBM Power System E1050 \(9043-Mrx\) Firmware
CVE-2026-11885
IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H1 A carefully crafted OS hypervisor call can cause the PowerVM hypervisor to crash or compromise OS memory integrity.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.001 (4.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · 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 \(9223-22h\) Firmware
- IBM Power System H922 \(9223-22s\) Firmware
- IBM Power System H924 \(9223-42h\) Firmware
- IBM Power System H924 \(9223-42s\) Firmware
Weakness classification (CWE)
References
- www.ibm.com/support/pages/node/7280628 (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-11885?
- CVE-2026-11885 is a high-severity vulnerability in IBM Power System E1050 \(9043-Mrx\) Firmware, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.4/10. Published 2026-07-30.
- How severe is CVE-2026-11885?
- High severity. CVSS v3 base score is 8.4 out of 10.