CVE-2026-23554

highpriority · track · 0EPSS 0.001 · 3 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.13% (3rd) EPSS

CVSS 7.8 · high

Is it mine?

7 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

The Intel EPT paging code uses an optimization to defer flushing of any cached EPT state until the p2m lock is dropped, so that multiple modifications done under the same locked region only issue a single flush. Freeing of paging structures however is not deferred until the flushing is done, and can result in freed pages transiently being present in cached state. Such stale entries can point to memory ranges not owned by the guest, thus allowing access to unintended memory regions.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedxen-0:4.18.5_12-150600.3.40.1.aarch64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-0:4.18.5_12-150600.3.40.1.x86_64 as component of SUSE Linux Enterprise Server 15 SP6-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-0:4.18.5_12-150600.3.40.1.x86_64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-devel-0:4.18.5_12-150600.3.40.1.aarch64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-devel-0:4.18.5_12-150600.3.40.1.x86_64 as component of SUSE Linux Enterprise Server 15 SP6-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-devel-0:4.18.5_12-150600.3.40.1.x86_64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-doc-html-0:4.18.5_12-150600.3.40.1.aarch64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-doc-html-0:4.18.5_12-150600.3.40.1.x86_64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-0:4.18.5_12-150600.3.40.1.aarch64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-0:4.18.5_12-150600.3.40.1.x86_64 as component of SUSE Linux Enterprise Server 15 SP6-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-0:4.18.5_12-150600.3.40.1.x86_64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-32bit-0:4.18.5_12-150600.3.40.1.x86_64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-0:4.18.5_12-150600.3.40.1.aarch64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-0:4.18.5_12-150600.3.40.1.x86_64 as component of SUSE Linux Enterprise Server 15 SP6-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-0:4.18.5_12-150600.3.40.1.x86_64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-domU-0:4.18.5_12-150600.3.40.1.aarch64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-domU-0:4.18.5_12-150600.3.40.1.x86_64 as component of SUSE Linux Enterprise Server 15 SP6-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-domU-0:4.18.5_12-150600.3.40.1.x86_64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-xendomains-wait-disk-0:4.18.5_12-150600.3.40.1.noarch as component of SUSE Linux Enterprise Server 15 SP6-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-xendomains-wait-disk-0:4.18.5_12-150600.3.40.1.noarch as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise Server 15 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-devel-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-devel-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-devel-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise Server 15 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise Micro 5.5suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise Server 15 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise Server 15 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-domU-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-domU-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-domU-0:4.17.6_06-150500.3.62.2.x86_64 as component of SUSE Linux Enterprise Server 15 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-xendomains-wait-disk-0:4.17.6_06-150500.3.62.2.noarch as component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-xendomains-wait-disk-0:4.17.6_06-150500.3.62.2.noarch as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-xendomains-wait-disk-0:4.17.6_06-150500.3.62.2.noarch as component of SUSE Linux Enterprise Server 15 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-0:4.20.2_08-150700.3.28.1.x86_64 as component of SUSE Linux Enterprise Module for Server Applications 15 SP7suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-devel-0:4.20.2_08-150700.3.28.1.x86_64 as component of SUSE Linux Enterprise Module for Server Applications 15 SP7suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-0:4.20.2_08-150700.3.28.1.x86_64 as component of SUSE Linux Enterprise Module for Basesystem 15 SP7suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-0:4.20.2_08-150700.3.28.1.x86_64 as component of SUSE Linux Enterprise Module for Server Applications 15 SP7suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-domU-0:4.20.2_08-150700.3.28.1.x86_64 as component of SUSE Linux Enterprise Module for Basesystem 15 SP7suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-xendomains-wait-disk-0:4.20.2_08-150700.3.28.1.noarch as component of SUSE Linux Enterprise Module for Server Applications 15 SP7suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-0:4.21.1_02-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-0:4.21.1_02-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-0:4.21.1_02-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-0:4.21.1_02-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-devel-0:4.21.1_02-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-devel-0:4.21.1_02-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-devel-0:4.21.1_02-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-devel-0:4.21.1_02-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-doc-html-0:4.21.1_02-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-doc-html-0:4.21.1_02-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-doc-html-0:4.21.1_02-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-doc-html-0:4.21.1_02-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-0:4.21.1_02-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-0:4.21.1_02-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-0:4.21.1_02-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-libs-0:4.21.1_02-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-0:4.21.1_02-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-0:4.21.1_02-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-0:4.21.1_02-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-0:4.21.1_02-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-domU-0:4.21.1_02-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-domU-0:4.21.1_02-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-domU-0:4.21.1_02-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-domU-0:4.21.1_02-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-xendomains-wait-disk-0:4.21.1_02-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-xendomains-wait-disk-0:4.21.1_02-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-xendomains-wait-disk-0:4.21.1_02-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedxen-tools-xendomains-wait-disk-0:4.21.1_02-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondaryexploitability 1.1 · impact 6

v3.17.1highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.8highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · SUSE Product Security

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-367US

affected products (7)

Products and version ranges known to be affected.

Citrix Systems XenServer 8.4all versionscert_bundDEcpe:/a:citrix:xenserver:8.4
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Open Source Xen≥ 4.18cert_bundDE
xen xen≥ 4.17nvdUScpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

advisories (5)

Vendor and ecosystem advisories describing this.

SUSE-SU-2026:0908-1Security update for xen2026-03-17csaf · suse_csafDE
Security update for xen
SUSE-SU-2026:1092-1Security update for xen2026-03-26csaf · suse_csafDE
Security update for xen
SUSE-SU-2026:1093-1Security update for xen2026-03-26csaf · suse_csafDE
Security update for xen
WID-SEC-W-2026-0760Xen und Citrix Systems XenServer: Mehrere SchwachstellenDeutsch2026-03-17csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in Xen und Citrix Systems XenServer ausnutzen, um seine Privilegien zu erhöhen, einen Denial-of-Service-Zustand herbeizuführen oder vertrauliche Informationen offenzulegen.
openSUSE-SU-2026:10457-1xen-4.21.1_02-1.1 on GA media2026-03-28csaf · suse_csafDE
xen-4.21.1_02-1.1 on GA media

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd suse_csaf NVD CVE.org MITRE

published 2026-03-23modified 2026-06-17

references (9)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

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