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CVE-2026-17042— Power System Out-of-bounds Read

Quick assessment

Affected
IBM Power Systems Firmware
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IBM Power Systems Firmware是美国IBM公司的一款服务器固件管理工具。 IBM Power Systems Firmware FW950.00至FW950.H2版本、OP940.00至OP940.a1版本和OP940.00至OP940.81版本存在缓冲区错误漏洞，该漏洞源于主机固件NVRAM解析问题，可能导致具有root权限的攻击者写入特制NVRAM镜像，造成主机固件启动阶段崩溃并可能发生内存损坏，影响系统完整性和可用性。

CVSS 7.3 · High EPSS 0.10% · P1

Affected Version Matrix 3

VendorProduct Version RangeStatus
IBM Power Systems Firmware FW950.00≤ FW950.H2 affected
OP940.00≤ OP940.a1 affected
OP940.00≤ OP940.81 affected
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I. Basic Information for CVE-2026-17042

Vulnerability Information
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Vulnerability Title
Power System Out-of-bounds Read
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
IBM Power Systems Firmware 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM Power Systems Firmware是美国IBM公司的一款服务器固件管理工具。 IBM Power Systems Firmware FW950.00至FW950.H2版本、OP940.00至OP940.a1版本和OP940.00至OP940.81版本存在缓冲区错误漏洞，该漏洞源于主机固件NVRAM解析问题，可能导致具有root权限的攻击者写入特制NVRAM镜像，造成主机固件启动阶段崩溃并可能发生内存损坏，影响系统完整性和可用性。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
IBM Power Systems Firmware FW950.00 ~ FW950.H2 cpe:2.3:o:ibm:power_systems_firmware:fw950.00:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-17042

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III. Intelligence Information for CVE-2026-17042

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Vendor Advisories for CVE-2026-17042 (1)

Same Patch Batch · IBM · 2026-08-19 · 107 CVEs total

CVE-2026-15068 9.9 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16816 9.9 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16919 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16917 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16656 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16913 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16834 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16840 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16845 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16862 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16894 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16885 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16882 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16864 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16872 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16687 9.6 CRITICAL Power System Buffer Overflow
CVE-2026-16835 9.6 CRITICAL Power System Improper Certificate Validation
CVE-2026-16903 9.6 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16839 9.4 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16822 9.3 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS

Showing top 20 of 107 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Power Systems Firmware
Same vendor: IBM
Same weakness: CWE-125

V. Comments for CVE-2026-17042

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