Integer overflow in IBM Power Firmware
CVE-2026-19321
Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, and FW1060.00 through FW1060.80 is affected by a vulnerability in the host firmware. An attacker with service access to the service processor can supply a carefully crafted command that could leak the contents of hardware registers that should be inaccessible to the service processor. Successful exploitation could result in limited confidentiality or availability impacts to the affected host system.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (4.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.1% 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: 0.002 · change: +0.000
Affected products
- IBM Power Firmware — versions FW1120.00
- IBM Power System E1050 \(9043-Mrx\) Firmware
- IBM Power System E1080 \(9080-Hex\) Firmware
- IBM Power System E1150 \(9043-Mru\) Firmware — versions fw1120.00
- IBM Power System E1180 \(9080-Heu\) Firmware — versions fw1120.00
- IBM Power System L1022 \(9786-22h\) Firmware
- IBM Power System L1024 \(9786-42h\) Firmware
- IBM Power System L1122 \(9856-22h\) Firmware — versions fw1120.00
- IBM Power System L1124 \(9856-42h\) Firmware — versions fw1120.00
- IBM Power System S1012 \(9028-21b\) Firmware
Weakness classification (CWE)
References
- www.ibm.com/support/pages/node/7283222 (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-19321?
- CVE-2026-19321 is a medium-severity vulnerability in IBM Power Firmware, classified under Integer Overflow or Wraparound. CVSS score: 6.7/10. Published 2026-08-19.
- How severe is CVE-2026-19321?
- Medium severity. CVSS v3 base score is 6.7 out of 10.