CVE-2018-1992: IBM Power System AC922 (8335-Gtg) Firmware

Medium severity, CVSS 6.4. EPSS: 0.4% chance of exploitation in the next 30 days.

The IBM Power 9 OP910, OP920, and FW910 boot firmware's bootloader is responsible for loading and validating the initial boot firmware image that drives the rest of the system's hardware initialization. The bootloader firmware contains a buffer overflow vulnerability such that, if an attacker were able to replace the initial boot firmware image with a very carefully crafted and sufficiently large, malicious replacement, it could cause the bootloader, during the load of that image, to overwrite its own instruction memory and circumvent secure boot protections, install trojans, etc. IBM X-Force ID: 154345.

Affected products

• IBM Power System AC922 (8335-Gtg) Firmware: before op910.30 (fixed in op910.30)
• IBM Power System AC922 (8335-Gth) Firmware: before op920.10 (fixed in op920.10)
• IBM Power System AC922 (8335-Gtx) Firmware: before op920.10 (fixed in op920.10)
• IBM Power System h922 (9223-22h) Firmware: before fw910.10 (fixed in fw910.10)
• IBM Power System h924 (9223-42h) Firmware: before fw910.10 (fixed in fw910.10)
• IBM Power System l922 (9008-22l) Firmware: before fw910.10 (fixed in fw910.10)
• IBM Power System LC921 (9006-12p) Firmware: before op920.10 (fixed in op920.10)
• IBM Power System LC922 (9006-22p) Firmware: before op920.10 (fixed in op920.10)
• IBM Power System s914 (9009-41a) Firmware: before fw910.10 (fixed in fw910.10)
• IBM Power System s922 (9009-22a) Firmware: before fw910.10 (fixed in fw910.10)
• IBM Power System s924 (9009-42a) Firmware: before fw910.10 (fixed in fw910.10)

Published 2019-03-21. Last modified 2026-06-17.