{"id":"CVE-2026-4937","aliases":["EUVD-2026-62842","GHSA-5v8g-ffgq-6fq9"],"status":"published","title":"Power System Insufficient Entropy","description":"IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 could allow a local attacker with administrative privileges to decrypt encrypted data due to certain hypervisor calls utilizing less entropy than requested.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00132,"percentile":0.02759,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-331"],"published":"2026-08-19T20:11:01Z","modified":"2026-08-25T20:33:37Z","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_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/7283900","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4937"},{"url":"https://github.com/advisories/GHSA-5v8g-ffgq-6fq9"}],"sources":{"cve":[{"id":"CVE-2026-4937","title":"Power System Insufficient Entropy","description":"IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 could allow a local attacker with administrative privileges to decrypt encrypted data due to certain hypervisor calls utilizing less entropy than requested.","status":"published","published":"2026-08-19T20:11:01.81Z","modified":"2026-08-20T15:20:20.047Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-331"],"updated_at":"2026-11-02T14:19:59.761005Z"}],"euvd":[{"id":"EUVD-2026-62842","description":"IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 could allow a local attacker with administrative privileges to decrypt encrypted data due to certain hypervisor calls utilizing less entropy than requested.","status":"published","published":"2026-08-19T20:11:01Z","modified":"2026-08-20T15:20:20Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T18:01:40.093236Z"}],"ghsa":[{"id":"GHSA-5v8g-ffgq-6fq9","title":"IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00...","description":"IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 could allow a local attacker with administrative privileges to decrypt encrypted data due to certain hypervisor calls utilizing less entropy than requested.","status":"published","published":"2026-08-19T21:30:38Z","modified":"2026-08-19T21:30:46Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-331"],"updated_at":"2026-11-02T15:10:44.718568Z"}],"nvd":[{"id":"CVE-2026-4937","description":"IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 could allow a local attacker with administrative privileges to decrypt encrypted data due to certain hypervisor calls utilizing less entropy than requested.","status":"published","published":"2026-08-19T21:16:55.57Z","modified":"2026-08-25T20:33:37.26Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-331"],"updated_at":"2026-11-02T14:12:39.962615Z"}]}}