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CVE-2026-4937— Power System Insufficient Entropy

Quick assessment

Affected
IBM PowerVM Hypervisor
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 powervm hypervisor是美国IBM公司的一款企业级虚拟化管理程序。 IBM PowerVM Hypervisor FW1110.00至FW1110.20版本、FW1060.00至FW1060.71版本和FW950.00至FW950.H2版本存在加密问题漏洞，该漏洞源于某些hypervisor调用使用的熵少于请求的熵，可能导致具有管理员权限的本地攻击者解密加密数据。

CVSS 5.3 · Medium EPSS 0.12% · P3

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 3

VendorProduct Version RangeStatus
IBM PowerVM Hypervisor FW1110.00≤ FW1110.20 affected
FW1060.00≤ FW1060.71 affected
FW950.00≤ FW950.H2 affected
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I. Basic Information for CVE-2026-4937

Vulnerability Information
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Vulnerability Title
Power System Insufficient Entropy
Source: CVE Program / CVE List V5
Vulnerability Description
IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 could allow a local attacker with administrative privileges to decrypt encrypted data due to certain hypervisor calls utilizing less entropy than requested.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息熵不充分
Source: CVE Program / CVE List V5
Vulnerability Title
IBM PowerVM Hypervisor 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM powervm hypervisor是美国IBM公司的一款企业级虚拟化管理程序。 IBM PowerVM Hypervisor FW1110.00至FW1110.20版本、FW1060.00至FW1060.71版本和FW950.00至FW950.H2版本存在加密问题漏洞，该漏洞源于某些hypervisor调用使用的熵少于请求的熵，可能导致具有管理员权限的本地攻击者解密加密数据。
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 PowerVM Hypervisor FW1110.00 ~ FW1110.20 cpe:2.3:o:ibm:power_systems_firmware:fw1110.00:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4937

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III. Intelligence Information for CVE-2026-4937

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Vendor Advisories for CVE-2026-4937 (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-2026-16894 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16882 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16919 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16917 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16862 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16864 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16913 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16834 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16885 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16845 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16872 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16656 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16840 9.8 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16903 9.6 CRITICAL Vulnerabilities in IBM AIX and PowerVM VIOS
CVE-2026-16835 9.6 CRITICAL Power System Improper Certificate Validation
CVE-2026-16687 9.6 CRITICAL Power System Buffer Overflow
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: PowerVM Hypervisor
Same vendor: IBM
Same weakness: CWE-331

V. Comments for CVE-2026-4937

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