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
EPSS: 0.001 (1.0th percentile) — read the EPSS interpretation.
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.
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
- psirt@us.ibm.com (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.