CVE-2026-17042 (GCVE-0-2026-17042)
Vulnerability from cvelistv5
Published
2026-08-19 19:11
Modified
2026-08-19 19:46
Severity ?
7.3 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H
CWE
Summary
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.
References
Impacted products
Vendor Product Version
IBM Power Systems Firmware Version: FW950.00   ≤ FW950.H2
Version: OP940.00   ≤ OP940.a1
Version: OP940.00   ≤ OP940.81
    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:*:*:*:*:*:*:*
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                "id": "CVE-2026-17042",
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                "role": "CISA Coordinator",
                "timestamp": "2026-08-19T19:24:22.753664Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        "title": "CISA ADP Vulnrichment"
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              "value": "\u003cp\u003eCustomers with the products below should install FW950.H3(950_230) or newer to remediate this vulnerability.\u003cbr/\u003ePower 9\u003c/p\u003e\u003col\u003e\u003cli\u003eIBM Power System S922 (9009-22G)\u003c/li\u003e\u003cli\u003eIBM Power System H922 (9223-22S)\u003c/li\u003e\u003cli\u003eIBM Power System S914 (9009-41G)\u003c/li\u003e\u003cli\u003eIBM Power System S924 (9009-42G)\u003c/li\u003e\u003cli\u003eIBM Power System H924 (9223-42S)\u003c/li\u003e\u003cli\u003eIBM Power System E950 (9040-MR9)\u003c/li\u003e\u003cli\u003eIBM Power System E980 (9080-M9S)\u003c/li\u003e\u003c/ol\u003e\u003cp\u003eCustomers with the products below should install OP940.a2 or newer to remediate this vulnerability.\u003cbr/\u003ePower 9\u003c/p\u003e\u003col\u003e\u003cli\u003eIBM Power System AC922\u00a0(8335-GTH, 8335-GTX)\u003c/li\u003e\u003c/ol\u003e\u003cp\u003eCustomers with the products below should install OP940.82 or newer to remediate this vulnerability.\u003cbr/\u003ePower Hardware Management Console\u003c/p\u003e\u003col\u003e\u003cli\u003eIBM Power Hardware Management Console (7063-CR2)\u003c/li\u003e\u003c/ol\u003e\u003cp\u003e\u003cem\u003eThe images mentioned above can be located at IBM Fix Central : \u003c/em\u003e\u003ca href=\"https://www.ibm.com/support/fixcentral/\" rel=\"noopener noreferrer nofollow\"\u003e\u003cem\u003ehttps://www.ibm.com/support/fixcentral/\u003c/em\u003e\u003c/a\u003e\u003c/p\u003e"
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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 \\u2014 clearing NVRAM via the service processor \\u2014 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\", \"value\": \"\u003cp\u003eIBM 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 \\u2014 clearing NVRAM via the service processor \\u2014 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.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-125\", \"description\": \"CWE-125 Out-of-bounds Read\"}]}], \"providerMetadata\": {\"orgId\": \"9a959283-ebb5-44b6-b705-dcc2bbced522\", \"shortName\": \"ibm\", \"dateUpdated\": \"2026-08-19T19:46:38.034Z\"}}}",
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