{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-4937","assignerOrgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","state":"PUBLISHED","assignerShortName":"ibm","dateReserved":"2026-03-26T20:42:14.402Z","datePublished":"2026-08-19T20:11:01.810Z","dateUpdated":"2026-08-20T15:20:20.047Z"},"containers":{"cna":{"providerMetadata":{"orgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","shortName":"ibm","dateUpdated":"2026-08-19T20:11:01.810Z"},"title":"Power System Insufficient Entropy","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-331","description":"CWE-331 Insufficient Entropy","type":"CWE"}]}],"affected":[{"vendor":"IBM","product":"PowerVM Hypervisor","versions":[{"status":"affected","version":"FW1110.00","lessThanOrEqual":"FW1110.20","versionType":"semver"},{"status":"affected","version":"FW1060.00","lessThanOrEqual":"FW1060.71","versionType":"semver"},{"status":"affected","version":"FW950.00","lessThanOrEqual":"FW950.H2","versionType":"semver"}],"cpes":["cpe:2.3:o:ibm:power_systems_firmware:fw1110.00:*:*:*:*:*:*:*","cpe:2.3:o:ibm:power_systems_firmware:fw1110.20:*:*:*:*:*:*:*","cpe:2.3:o:ibm:power_systems_firmware:fw1060.00:*:*:*:*:*:*:*","cpe:2.3:o:ibm:power_systems_firmware:fw1060.71:*:*:*:*:*:*:*","cpe:2.3:o:ibm:power_systems_firmware:fw950.00:*:*:*:*:*:*:*","cpe:2.3:o:ibm:power_systems_firmware:fw950.h2:*:*:*:*:*:*:*"]}],"descriptions":[{"lang":"en","value":"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.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>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.</p>"}]}],"references":[{"url":"https://www.ibm.com/support/pages/node/7283900","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseSeverity":"MEDIUM","baseScore":5.3,"vectorString":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N"}}],"workarounds":[{"lang":"en","value":"Fully remediating this CVE requires administrators that have enabled Platform Keystore to take the following actions:\n\n  *  Reboot any partitions that have Platform Keystore enabled after updating firmware.\n  *  Regenerate all cryptographic keys that were generated by Platform Keystore on affected firmware versions, as those keys are considered weak.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Fully remediating this CVE requires administrators that have enabled Platform Keystore to take the following actions:</p><ul><li>Reboot any partitions that have Platform Keystore enabled after updating firmware.</li><li>Regenerate all cryptographic keys that were generated by Platform Keystore on affected firmware versions, as those keys are considered weak.</li></ul>"}]}],"solutions":[{"lang":"en","value":"Customers with the products below should install FW1110.30(1110_125), FW1120.00(1120_159), or newer to remediate this vulnerability.\nPower 11\n\n  *  IBM Power System E1180 (9080-HEU)\n\n\nCustomers with the products below should install FW1110.30(1110_145), FW1120.00(1120_183), or newer to remediate this vulnerability.\nPower 11\n\n  *  IBM Power System S1122 (9824-22A)\n  *  IBM Power System S1124 (9824-42A)\n  *  IBM Power System S1122s (9824-22B)\n  *  IBM Power System S1114 (9824-41B)\n  *  IBM Power System L1122 (9856-22H)\n  *  IBM Power System L1124 (9856-42H)\n  *  IBM Power System E1150 (9043-MRU)\n\n\nCustomers with the products below should install FW1060.72(1060_171) / FW1060.80(1060_180), or newer to remediate this vulnerability.\nPower 10\n\n  *  IBM Power System E1080 (9080-HEX)\n\n\nCustomers with the products below should install FW1060.72(1060_177) / FW1060.80(1060_185), or newer to remediate this vulnerability.\nPower 10\n\n  *  IBM Power System S1022 (9105-22A)\n  *  IBM Power System S1024 (9105-42A)\n  *  IBM Power System S1022s (9105-22B)\n  *  IBM Power System S1014 (9105-41B)\n  *  IBM Power System L1022 (9786-22H)\n  *  IBM Power System L1024 (9786-42H)\n  *  IBM Power System E1050 (9043-MRX)\n  *  IBM Power System S1012 (9028-21B)\n\n\nCustomers with the products below should install FW950.H3(950_230) or newer to remediate this vulnerability.\nPower 9\n\n  *  IBM Power System S922 (9009-22G)\n  *  IBM Power System H922 (9223-22S)\n  *  IBM Power System S914 (9009-41G)\n  *  IBM Power System S924 (9009-42G)\n  *  IBM Power System H924 (9223-42S)\n  *  IBM Power System E950 (9040-MR9)\n  *  IBM Power System E980 (9080-M9S)\n\n\nThe images mentioned above can be located at IBM Fix Central :  https://www.ibm.com/support/fixcentral/ https://www.ibm.com/support/fixcentral/","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Customers with the products below should install FW1110.30(1110_125), FW1120.00(1120_159), or newer to remediate this vulnerability.<br/>Power 11</p><ol><li>IBM Power System E1180 (9080-HEU)</li></ol><p>Customers with the products below should install FW1110.30(1110_145), FW1120.00(1120_183), or newer to remediate this vulnerability.<br/>Power 11</p><ol><li>IBM Power System S1122 (9824-22A)</li><li>IBM Power System S1124 (9824-42A)</li><li>IBM Power System S1122s (9824-22B)</li><li>IBM Power System S1114 (9824-41B)</li><li>IBM Power System L1122 (9856-22H)</li><li>IBM Power System L1124 (9856-42H)</li><li>IBM Power System E1150 (9043-MRU)</li></ol><p>Customers with the products below should install FW1060.72(1060_171) / FW1060.80(1060_180), or newer to remediate this vulnerability.<br/>Power 10</p><ol><li>IBM Power System E1080 (9080-HEX)</li></ol><p>Customers with the products below should install FW1060.72(1060_177) / FW1060.80(1060_185), or newer to remediate this vulnerability.<br/>Power 10</p><ol><li>IBM Power System S1022 (9105-22A)</li><li>IBM Power System S1024 (9105-42A)</li><li>IBM Power System S1022s (9105-22B)</li><li>IBM Power System S1014 (9105-41B)</li><li>IBM Power System L1022 (9786-22H)</li><li>IBM Power System L1024 (9786-42H)</li><li>IBM Power System E1050 (9043-MRX)</li><li>IBM Power System S1012 (9028-21B)</li></ol><p>Customers with the products below should install FW950.H3(950_230) or newer to remediate this vulnerability.<br/>Power 9</p><ol><li>IBM Power System S922 (9009-22G)</li><li>IBM Power System H922 (9223-22S)</li><li>IBM Power System S914 (9009-41G)</li><li>IBM Power System S924 (9009-42G)</li><li>IBM Power System H924 (9223-42S)</li><li>IBM Power System E950 (9040-MR9)</li><li>IBM Power System E980 (9080-M9S)</li></ol><p><em>The images mentioned above can be located at IBM Fix Central : </em><a href=\"https://www.ibm.com/support/fixcentral/\" rel=\"noopener noreferrer nofollow\"><em>https://www.ibm.com/support/fixcentral/</em></a></p>"}]}]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-20T14:18:54.835231Z","id":"CVE-2026-4937","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-20T15:20:20.047Z"}}]}}