SB2026102203 - Memory leak in Linux kernel powerpc kvm

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Main Vulnerability Database SB2026102203

SB2026102203 - Memory leak in Linux kernel powerpc kvm

Published: October 22, 2026

Security Bulletin ID SB2026102203
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Memory leak (CVE-ID: CVE-2026-98433)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service by exhausting secure memory resources.

The vulnerability exists due to a memory leak in the Linux kernel KVM PowerPC Book3S HV kvmppc_svm_page_in() function when uv_page_in() fails after a secure device page has been allocated. A local user can trigger page-in operations that encounter this error to leave secure device pages and associated metadata unreclaimed, potentially exhausting the firmware-bounded secure memory pool and making affected guest frame numbers unusable for the lifetime of the VM.

The issue is reachable on POWER9/10 systems using Ultravisor/PEF.


Remediation

Install update from vendor's website.

References