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UBUNTU-CVE-2026-23556

0
Unknown
Vulnerabilitygcveosvubuntu-cve-2026-23556ubuntu-16-04-ltsubuntu-18-04-ltsubuntu-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-25-10ubuntu-26-04-lts
Published: 07/09/2026 (07/09/2026, 16:16:00 UTC)
Source: GCVE Database
Product: xen

Description

When oxenstored is tearing a domain down, the node data is cleaned up but the usage counts are leaked. When the domain ID is eventually reused, the new domain can create fewer nodes before beeing deemed to be over quota.

CVSS v4.0

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
High
Vuln. Availability
High
Subsq. Confidentiality
High
Subsq. Integrity
High
Subsq. Availability
High
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Affected software

Ubuntu:16.04:LTSmore threats →ghsa
xen
pkg:deb/ubuntu/[email protected]?arch=source&distro=xenial
Affected versions
=4.5.1-0ubuntu1=4.5.1-0ubuntu2=4.6.0-1ubuntu1=4.6.0-1ubuntu2=4.6.0-1ubuntu4=4.6.0-1ubuntu4.1=4.6.0-1ubuntu4.2=4.6.0-1ubuntu4.3=4.6.5-0ubuntu1=4.6.5-0ubuntu1.1=4.6.5-0ubuntu1.2=4.6.5-0ubuntu1.4
Ubuntu:18.04:LTSmore threats →ghsa
xen
pkg:deb/ubuntu/[email protected]?arch=source&distro=bionic
Affected versions
=4.9.0-0ubuntu3=4.9.0-0ubuntu4=4.9.2-0ubuntu1
Ubuntu:20.04:LTSmore threats →ghsa
xen
pkg:deb/ubuntu/[email protected]+24-g14b62ab3e5-1ubuntu2.3?arch=source&distro=focal
Affected versions
=4.9.2-0ubuntu2=4.9.2-0ubuntu6=4.9.2-0ubuntu7=4.11.3+24-g14b62ab3e5-1ubuntu1=4.11.3+24-g14b62ab3e5-1ubuntu2=4.11.3+24-g14b62ab3e5-1ubuntu2.2=4.11.3+24-g14b62ab3e5-1ubuntu2.3
Ubuntu:22.04:LTSmore threats →ghsa
xen
pkg:deb/ubuntu/[email protected]~ubuntu2.1?arch=source&distro=jammy
Affected versions
=4.11.4+24-gddaaccbbab-1ubuntu2=4.16.0-1~ubuntu2=4.16.0-1~ubuntu2.1
Ubuntu:24.04:LTSmore threats →ghsa
xen
pkg:deb/ubuntu/[email protected]+10-g091466ba55-1.1ubuntu3?arch=source&distro=noble
Affected versions
=4.17.2-1=4.17.2+55-g0b56bed864-1=4.17.2+76-ge1f9cb16e2-1=4.17.2+76-ge1f9cb16e2-1ubuntu1=4.17.3+10-g091466ba55-1=4.17.3+10-g091466ba55-1.1ubuntu2=4.17.3+10-g091466ba55-1.1ubuntu3
Ubuntu:25.10more threats →ghsa
xen
pkg:deb/ubuntu/[email protected]+68-g35cb38b222-1?arch=source&distro=questing
Affected versions
=4.20.0-1ubuntu1=4.20.0+68-g35cb38b222-1
Ubuntu:26.04:LTSmore threats →ghsa
xen
pkg:deb/ubuntu/[email protected]+7-g1badcf5035-2build2?arch=source&distro=resolute
Affected versions
=4.20.0+68-g35cb38b222-1=4.20.2+7-g1badcf5035-2=4.20.2+7-g1badcf5035-2build2

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-23556
Osv Schema Version
1.7.0
Aliases
[]
Ecosystems
["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
Database Specific Severity
null
Cvss Version
4.0

Threat ID: 6a58b4dc68715ace43dae4d3

Added to database: 07/16/2026, 10:39:24 UTC

Last updated: 07/16/2026, 10:39:24 UTC

Views: 1

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