---
id: CVE-2026-89925
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  KVM: s390: Fix memory leak in guest debug handling

  bp_data is freed only for the error case by kfree(bp_data).
  Every successful KVM_SET_GUEST_DEBUG will leak bp_data.
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  KVM: s390: Fix memory leak in guest debug handling

  bp_data is freed only for the error case by kfree(bp_data).
  Every successful KVM_SET_GUEST_DEBUG will leak bp_data.
severity: medium
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 27291e2165b6de70c476b7b675308113edd69a60 <
    39e7cebb889839b5762c9ad22e2d715b5883b288
  - >-
    Linux >= 27291e2165b6de70c476b7b675308113edd69a60 <
    58b1b729a9f90c80b508fc3e2174cbc0ee50859e
  - >-
    Linux >= 27291e2165b6de70c476b7b675308113edd69a60 <
    9071f75cbde3bf46119cb28e92cfbef830c4bf97
  - >-
    Linux >= 27291e2165b6de70c476b7b675308113edd69a60 <
    5940418e4232a2ff1d30ba12e0d213dbf48f0a83
  - >-
    Linux >= 27291e2165b6de70c476b7b675308113edd69a60 <
    fc2034c431adcbaabf5f8a01912358f07355349e
  - >-
    Linux >= 27291e2165b6de70c476b7b675308113edd69a60 <
    44bf3792c10f4bb3de507391f1837e020d92eaa2
  - >-
    Linux >= 27291e2165b6de70c476b7b675308113edd69a60 <
    581be9f6085834188cef1ad2f07babf3b421e409
  - >-
    Linux >= 27291e2165b6de70c476b7b675308113edd69a60 <
    121ea1de927c8b9bfdf53c31cad27b86d5de0293
  - Linux 3.16
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T11:17:01.653'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89925'
references:
  - url: 'https://git.kernel.org/stable/c/121ea1de927c8b9bfdf53c31cad27b86d5de0293'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/39e7cebb889839b5762c9ad22e2d715b5883b288'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/44bf3792c10f4bb3de507391f1837e020d92eaa2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/581be9f6085834188cef1ad2f07babf3b421e409'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/58b1b729a9f90c80b508fc3e2174cbc0ee50859e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5940418e4232a2ff1d30ba12e0d213dbf48f0a83'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9071f75cbde3bf46119cb28e92cfbef830c4bf97'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fc2034c431adcbaabf5f8a01912358f07355349e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89925.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89925'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2535114'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89925'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89925'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89925.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-09-16T10:53:53.971Z'
epss: 0.0021
epssPercentile: 0.11548
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-772
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

KVM: s390: Fix memory leak in guest debug handling

bp_data is freed only for the error case by kfree(bp_data).
Every successful KVM_SET_GUEST_DEBUG will leak bp_data.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89925.json)