{"id":"CVE-2026-16707","aliases":["EUVD-2026-62840","GHSA-8pm5-m8h3-36ww"],"status":"published","title":"Power System Out-of-bounds Read","description":"IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can send a specially crafted mailbox message to read or modify arbitrary regions of Hostboot memory, compromising the host firmware boot stack and the hypervisor subsequently loaded by it. Successful exploitation results in a confidentiality, integrity, and availability impact to the managed system.","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00169,"percentile":0.06295,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-08-19T20:09:07Z","modified":"2026-08-25T19:34:20Z","products":[{"vendor":"ibm","product":"power_system_e1050_\\(9043-mrx\\)_firmware"},{"vendor":"ibm","product":"power_system_e1080_\\(9080-hex\\)_firmware"},{"vendor":"ibm","product":"power_system_e1150_\\(9043-mru\\)_firmware"},{"vendor":"ibm","product":"power_system_e1180_\\(9080-heu\\)_firmware"},{"vendor":"ibm","product":"power_system_e950_\\(9040-mr9\\)_firmware"},{"vendor":"ibm","product":"power_system_e980_\\(9080-m9s\\)_firmware"},{"vendor":"ibm","product":"power_system_h922_\\(9223-22s\\)_firmware"},{"vendor":"ibm","product":"power_system_h924_\\(9223-42s\\)_firmware"},{"vendor":"ibm","product":"power_system_l1022_\\(9786-22h\\)_firmware"},{"vendor":"ibm","product":"power_system_l1024_\\(9786-42h\\)_firmware"},{"vendor":"ibm","product":"power_system_l1122_\\(9856-22h\\)_firmware"},{"vendor":"ibm","product":"power_system_l1124_\\(9856-42h\\)_firmware"},{"vendor":"ibm","product":"power_system_s1012_\\(9028-21b\\)_firmware"},{"vendor":"ibm","product":"power_system_s1014_\\(9105-41b\\)_firmware"},{"vendor":"ibm","product":"power_system_s1022_\\(9105-22a\\)_firmware"},{"vendor":"ibm","product":"power_system_s1022s_\\(9105-22b\\)_firmware"},{"vendor":"ibm","product":"power_system_s1024_\\(9105-42a\\)_firmware"},{"vendor":"ibm","product":"power_system_s1112_\\(9242-21b\\)_firmware"},{"vendor":"ibm","product":"power_system_s1112_\\(9242-21t\\)_firmware"},{"vendor":"ibm","product":"power_system_s1114_\\(9824-41b\\)_firmware"},{"vendor":"ibm","product":"power_system_s1122_\\(9824-22a\\)_firmware"},{"vendor":"ibm","product":"power_system_s1122s_\\(9824-22b\\)_firmware"},{"vendor":"ibm","product":"power_system_s1124_\\(9824-42a\\)_firmware"},{"vendor":"ibm","product":"power_system_s914_\\(9009-41g\\)_firmware"},{"vendor":"ibm","product":"power_system_s922_\\(9009-22g\\)_firmware"},{"vendor":"ibm","product":"power_system_s924_\\(9009-42g\\)_firmware"},{"vendor":"ibm","product":"powervm hypervisor"}],"references":[{"url":"https://www.ibm.com/support/pages/node/7283235","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16707"},{"url":"https://github.com/advisories/GHSA-8pm5-m8h3-36ww"}],"sources":{"cve":[{"id":"CVE-2026-16707","title":"Power System Out-of-bounds Read","description":"IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can send a specially crafted mailbox message to read or modify arbitrary regions of Hostboot memory, compromising the host firmware boot stack and the hypervisor subsequently loaded by it. Successful exploitation results in a confidentiality, integrity, and availability impact to the managed system.","status":"published","published":"2026-08-19T20:09:07.749Z","modified":"2026-08-21T03:57:27.564Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:20:11.24076Z"}],"euvd":[{"id":"EUVD-2026-62840","description":"IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can send a specially crafted mailbox message to read or modify arbitrary regions of Hostboot memory, compromising the host firmware boot stack and the hypervisor subsequently loaded by it. Successful exploitation results in a confidentiality, integrity, and availability impact to the managed system.","status":"published","published":"2026-08-19T20:09:07Z","modified":"2026-08-21T03:57:27Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:01:37.96401Z"}],"ghsa":[{"id":"GHSA-8pm5-m8h3-36ww","title":"IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and...","description":"IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can send a specially crafted mailbox message to read or modify arbitrary regions of Hostboot memory, compromising the host firmware boot stack and the hypervisor subsequently loaded by it. Successful exploitation results in a confidentiality, integrity, and availability impact to the managed system.","status":"published","published":"2026-08-19T21:30:33Z","modified":"2026-08-19T21:30:39Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:10:44.718568Z"}],"nvd":[{"id":"CVE-2026-16707","description":"IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can send a specially crafted mailbox message to read or modify arbitrary regions of Hostboot memory, compromising the host firmware boot stack and the hypervisor subsequently loaded by it. Successful exploitation results in a confidentiality, integrity, and availability impact to the managed system.","status":"published","published":"2026-08-19T20:17:02.14Z","modified":"2026-08-25T19:34:20.303Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:39.962615Z"}]}}