{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-17042","assignerOrgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","state":"PUBLISHED","assignerShortName":"ibm","dateReserved":"2026-07-24T12:55:35.930Z","datePublished":"2026-08-19T19:11:07.905Z","dateUpdated":"2026-08-19T19:46:38.034Z"},"containers":{"cna":{"providerMetadata":{"orgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","shortName":"ibm","dateUpdated":"2026-08-19T19:46:38.034Z"},"title":"Power System Out-of-bounds Read","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","type":"CWE"}]}],"affected":[{"vendor":"IBM","product":"Power Systems Firmware","versions":[{"status":"affected","version":"FW950.00","lessThanOrEqual":"FW950.H2","versionType":"semver"},{"status":"affected","version":"OP940.00","lessThanOrEqual":"OP940.a1","versionType":"semver"},{"status":"affected","version":"OP940.00","lessThanOrEqual":"OP940.81","versionType":"semver"}],"cpes":["cpe:2.3:o:ibm:power_systems_firmware:fw950.00:*:*:*:*:*:*:*","cpe:2.3:o:ibm:power_systems_firmware:fw950.h2:*:*:*:*:*:*:*","cpe:2.3:o:ibm:power_systems_firmware:op940.00:*:*:*:*:*:*:*","cpe:2.3:o:ibm:power_systems_firmware:op940.a1:*:*:*:*:*:*:*"]}],"descriptions":[{"lang":"en","value":"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.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>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.</p>"}]}],"references":[{"url":"https://www.ibm.com/support/pages/node/7283240","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":7.3,"vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H"}}],"solutions":[{"lang":"en","value":"Customers 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\nCustomers with the products below should install OP940.a2 or newer to remediate this vulnerability.\nPower 9\n\n  *  IBM Power System AC922 (8335-GTH, 8335-GTX)\n\n\nCustomers with the products below should install OP940.82 or newer to remediate this vulnerability.\nPower Hardware Management Console\n\n  *  IBM Power Hardware Management Console (7063-CR2)\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 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>Customers with the products below should install OP940.a2 or newer to remediate this vulnerability.<br/>Power 9</p><ol><li>IBM Power System AC922 (8335-GTH, 8335-GTX)</li></ol><p>Customers with the products below should install OP940.82 or newer to remediate this vulnerability.<br/>Power Hardware Management Console</p><ol><li>IBM Power Hardware Management Console (7063-CR2)</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":"2026-08-19T19:24:22.753664Z","id":"CVE-2026-17042","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":"2026-08-19T19:24:36.200Z"}}]}}