{"id":"CVE-2026-17042","aliases":["EUVD-2026-62696","GHSA-rcv3-hw8m-43fg"],"status":"published","title":"Power System Out-of-bounds Read","description":"IBM Power Systems Firmware FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware NVRAM parsing. An attacker with root access to a guest partition on an OpenPOWER system can write a specially crafted NVRAM image, causing the host firmware boot stage to crash with possible memory corruption. This condition persists until operator intervention — clearing NVRAM via the service processor — to restore normal operation. This vulnerability only affects OpenPOWER systems; systems running PowerVM are not affected. Successful exploitation results in an integrity and availability impact to the managed system.","severity":{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0014,"percentile":0.0341,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-08-19T19:11:07Z","modified":"2026-08-25T13:14:08Z","products":[{"vendor":"ibm","product":"power systems firmware"},{"vendor":"ibm","product":"power_hardware_management_console_\\(7063-cr2\\)_firmware"},{"vendor":"ibm","product":"power_system_ac922_\\(8335-gth\\)_firmware"},{"vendor":"ibm","product":"power_system_ac922_\\(8335-gtx\\)_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_s914_\\(9009-41g\\)_firmware"},{"vendor":"ibm","product":"power_system_s922_\\(9009-22g\\)_firmware"},{"vendor":"ibm","product":"power_system_s924_\\(9009-42g\\)_firmware"}],"references":[{"url":"https://www.ibm.com/support/pages/node/7283240","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17042"},{"url":"https://github.com/advisories/GHSA-rcv3-hw8m-43fg"}],"sources":{"cve":[{"id":"CVE-2026-17042","title":"Power System Out-of-bounds Read","description":"IBM Power Systems Firmware FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware NVRAM parsing. An attacker with root access to a guest partition on an OpenPOWER system can write a specially crafted NVRAM image, causing the host firmware boot stage to crash with possible memory corruption. This condition persists until operator intervention — clearing NVRAM via the service processor — to restore normal operation. This vulnerability only affects OpenPOWER systems; systems running PowerVM are not affected. Successful exploitation results in an integrity and availability impact to the managed system.","status":"published","published":"2026-08-19T19:11:07.905Z","modified":"2026-08-19T19:46:38.034Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:19:54.84674Z"}],"euvd":[{"id":"EUVD-2026-62696","description":"IBM Power Systems Firmware FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware NVRAM parsing. An attacker with root access to a guest partition on an OpenPOWER system can write a specially crafted NVRAM image, causing the host firmware boot stage to crash with possible memory corruption. This condition persists until operator intervention — clearing NVRAM via the service processor — to restore normal operation. This vulnerability only affects OpenPOWER systems; systems running PowerVM are not affected. Successful exploitation results in an integrity and availability impact to the managed system.","status":"published","published":"2026-08-19T19:11:07Z","modified":"2026-08-19T19:46:38Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H","level":"high"}],"updated_at":"2026-11-02T18:01:40.9092Z"}],"ghsa":[{"id":"GHSA-rcv3-hw8m-43fg","title":"IBM Power Systems Firmware FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and...","description":"IBM Power Systems Firmware FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware NVRAM parsing. An attacker with root access to a guest partition on an OpenPOWER system can write a specially crafted NVRAM image, causing the host firmware boot stage to crash with possible memory corruption. This condition persists until operator intervention — clearing NVRAM via the service processor — to restore normal operation. This vulnerability only affects OpenPOWER systems; systems running PowerVM are not affected. Successful exploitation results in an integrity and availability impact to the managed system.","status":"published","published":"2026-08-19T21:30:35Z","modified":"2026-08-19T21:30:46Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:10:44.718568Z"}],"nvd":[{"id":"CVE-2026-17042","description":"IBM Power Systems Firmware FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware NVRAM parsing. An attacker with root access to a guest partition on an OpenPOWER system can write a specially crafted NVRAM image, causing the host firmware boot stage to crash with possible memory corruption. This condition persists until operator intervention — clearing NVRAM via the service processor — to restore normal operation. This vulnerability only affects OpenPOWER systems; systems running PowerVM are not affected. Successful exploitation results in an integrity and availability impact to the managed system.","status":"published","published":"2026-08-19T20:17:12.127Z","modified":"2026-08-25T13:14:08Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:39.962615Z"}]}}