{"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": 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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"}}]}}

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