CVE-2026-4936: medium-severity vulnerability in IBM PowerVM Hypervisor
Power System Insufficient Entropy
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.1epss 0.1%
IBM PowerVM Hypervisor Platform KeyStore (PKS) and virtual TPM FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 use persistent storage key seeds that result in an AES key with reduced strength. An attacker with access to the service processor or HMC could exploit this weakness to derive the encryption key and access the data.
CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N
Affected products
IBM · PowerVM HypervisorRelated CVEs — IBM PowerVM Hypervisor
In the same product, most dangerous first.