CVE-2026-17042
CVE-2026-17042 is a high-severity vulnerability in Ibm Power System S922 (9009-22g) Firmware with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: High (CVSS 3.x base score 7.3)
- EPSS exploit prediction: 0% (1st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-125
- Affected product: Ibm Power System S922 (9009-22g) Firmware
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2026-17042?
- 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.
- How severe is CVE-2026-17042?
- CVE-2026-17042 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
- Is CVE-2026-17042 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-17042?
- CVE-2026-17042 primarily affects Ibm Power System S922 (9009-22g) Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-17042?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2026-17042 published?
- CVE-2026-17042 was published on 2026-08-19 and last updated on 2026-08-25.
References
Affected products (10)
- cpe:2.3:o:ibm:power_system_s922_\(9009-22g\)_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ibm:power_system_h922_\(9223-22s\)_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ibm:power_system_s914_\(9009-41g\)_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ibm:power_system_s924_\(9009-42g\)_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ibm:power_system_h924_\(9223-42s\)_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ibm:power_system_e950_\(9040-mr9\)_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ibm:power_system_e980_\(9080-m9s\)_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ibm:power_system_ac922_\(8335-gth\)_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ibm:power_system_ac922_\(8335-gtx\)_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ibm:power_hardware_management_console_\(7063-cr2\)_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Ibm Power System S922 (9009-22g) Firmware
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