{"cve":"CVE-2018-1992","nvd":{"published":"2019-03-21T16:00:33.107","modified":"2026-06-17T01:52:07.697","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","score":6.4},"cwes":["CWE-119"],"references":["https://exchange.xforce.ibmcloud.com/vulnerabilities/154345","https://www.ibm.com/support/docview.wss?uid=ibm10868992","https://exchange.xforce.ibmcloud.com/vulnerabilities/154345","https://www.ibm.com/support/docview.wss?uid=ibm10868992"],"products":["ibm:power_system_ac922_\\(8335-gtg\\)_firmware","ibm:power_system_ac922_\\(8335-gth\\)_firmware","ibm:power_system_ac922_\\(8335-gtx\\)_firmware","ibm:power_system_h922_\\(9223-22h\\)_firmware","ibm:power_system_h924_\\(9223-42h\\)_firmware","ibm:power_system_l922_\\(9008-22l\\)_firmware","ibm:power_system_lc921_\\(9006-12p\\)_firmware","ibm:power_system_lc922_\\(9006-22p\\)_firmware","ibm:power_system_s914_\\(9009-41a\\)_firmware","ibm:power_system_s922_\\(9009-22a\\)_firmware","ibm:power_system_s924_\\(9009-42a\\)_firmware"],"source":"nvd","synced_at":"2026-10-19T20:55:22.313337056+00:00"},"epss":{"cve":"CVE-2018-1992","score":0.00353,"percentile":0.29058,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}