---
id: CVE-2026-98433
title: >-
  kernel: KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in()
  failure (CVE-2026-98433)
summary: >-
  A flaw was found in the Linux kernel's KVM (Kernel-based Virtual Machine)
  subsystem for PowerPC architectures. When handling secure virtual machines, a
  failure during secure memory paging fails to release allocated device memory
  and intern…
severity: low
cvss: 2.5
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L'
cvssSource: vendor
cwe: CWE-772
vendor: Red Hat
product: Red Hat Enterprise Linux 10
affected:
  - enterprise_linux 10
  - enterprise_linux 8
  - openshift_container_platform 4
published: '2026-10-18'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T12:05:32+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98433.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98433.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98433'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554823'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98433'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98433'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98433.mbox
  - url: 'https://git.kernel.org/stable/c/ed2f2ff63cb7e71204096e765c6d02c3b6974b95'
  - url: 'https://git.kernel.org/stable/c/8f3b7746874b39fc20e0363c9076c7787d4765ba'
  - url: 'https://git.kernel.org/stable/c/a933d7024359e2e566b07903d1294b84f90482ae'
  - url: 'https://git.kernel.org/stable/c/c41088b2765af1e97e7bb05f906ae1823eca0388'
  - url: 'https://git.kernel.org/stable/c/f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b'
  - url: 'https://git.kernel.org/stable/c/dfb84274932737e338ff5eb27f34b4c8ecb01b50'
  - url: 'https://git.kernel.org/stable/c/fcbff8008b0e08cd53b611bd0ff7e01f5b962f80'
  - url: 'https://git.kernel.org/stable/c/0a416ee20bcccddf91ca5b63696a23b9d11d73aa'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
ingestedAt: '2026-10-18T15:45:12.310Z'
epss: 0.00165
epssPercentile: 0.05619
---

## Overview

A flaw was found in the Linux kernel's KVM (Kernel-based Virtual Machine) subsystem for PowerPC architectures. When handling secure virtual machines, a failure during secure memory paging fails to release allocated device memory and internal metadata. A local user can exploit this vulnerability by causing operations that trigger page-in errors, permanently consuming entries from the firmware-bounded secure memory pool. Over time, this resource exhaustion leads to a Denial of Service (DoS), rendering affected memory regions and virtual machines unusable.

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4 · updated 2026-10-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98433.json)

**kernel: KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure** — rated Low by Red Hat. Released 2026-10-18, updated 2026-10-19.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Container Platform 4

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Fix deferred