---
id: CVE-2026-62437
title: |-
  When guests are terminated, various pieces of cleanup need carrying out.
  The cleaning up of PCI devices which were assigned to guests, and the
  associated removal of tracking structures for IRQs used by the devices
  occurs relatively early…
summary: |-
  When guests are terminated, various pieces of cleanup need carrying out.
  The cleaning up of PCI devices which were assigned to guests, and the
  associated removal of tracking structures for IRQs used by the devices
  occurs relatively early…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H'
cwe:
  - CWE-362
vendor: Xen
product: Xen
affected:
  - Xen
published: '2026-09-08'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T19:17:31.640'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62437'
references:
  - url: 'https://xenbits.xenproject.org/xsa/advisory-509.html'
    label: security@xen.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/09/08/6'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://xenbits.xen.org/xsa/advisory-509.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62437.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-62437'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-62437'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-10T18:11:30.445915Z'
epss: 0.00124
epssPercentile: 0.01796
ingestedAt: '2026-09-08T15:33:26.984Z'
---

## Overview

When guests are terminated, various pieces of cleanup need carrying out.
The cleaning up of PCI devices which were assigned to guests, and the
associated removal of tracking structures for IRQs used by the devices
occurs relatively early in the process.  Unfortunately after that point
the guest about to be terminated could cause its device model (DM) to
re-establish such tracking structures, by having it bind one or more IRQs
anew.  While some of those tracking structures would still be cleaned up
later on, at least one would not be.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · updated 2026-09-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62437.json)