CVE-2026-4936 — MEDIUM (5.1)

Vulnerability Description

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 Score

5.1

MEDIUM

CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N

Attack Vector

ADJACENT_NETWORK

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Related Weaknesses (CWE)

CWE-331

References

https://www.ibm.com/support/pages/node/7283890

FAQ

What is CVE-2026-4936?

CVE-2026-4936 is a vulnerability with a CVSS score of 5.1 (MEDIUM). 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 a...

How severe is CVE-2026-4936?

CVE-2026-4936 has been rated MEDIUM with a CVSS base score of 5.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-4936?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.