CVE-2026-62432

highpriority · track · 0EPSS 0.002 · 15 %ileDEEURU

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.24% (15th) EPSS

CVSS 7.3 · high

Is it mine?

46 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-23

The EVTCHNOP_expand_array hypercall checks for whether FIFO event channels are enabled, but without holding the correct lock. It can race with EVTCHNOP_reset, resulting in dereferencing a NULL pointer.

cvss

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

7.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.7–7.3

v3.17.3highAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU

v3.17.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · ENISA EU

v3.17.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondaryexploitability 3.9 · impact 3.4

v3.16.7mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-362USCWE-362US

affected products (46)

Products and version ranges known to be affected.

Citrix Systems XenServer 8.4all versionscert_bundDEcpe:/a:citrix:xenserver:8.4
Citrix Systems XenServer 9all versionscert_bundDEcpe:/a:citrix:xenserver:9
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Open Source Xen 4.17.xall versionscert_bundDEcpe:/o:xen:xen:4.17.x
Open Source Xen 4.18.xall versionscert_bundDEcpe:/o:xen:xen:4.18.x
Open Source Xen 4.19.xall versionscert_bundDEcpe:/o:xen:xen:4.19.x
Open Source Xen 4.20.xall versionscert_bundDEcpe:/o:xen:xen:4.20.x
Open Source Xen 4.21.xall versionscert_bundDEcpe:/o:xen:xen:4.21.x
Open Source Xen 4.22.xall versionscert_bundDEcpe:/o:xen:xen:4.22.x
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Novell Inc. SUSE Linux Enterprise High Performance Computing≤ 15 SP5-LTSSfstec_bduRU
Novell Inc. SUSE Linux Enterprise High Performance Computing≤ 15 SP4-LTSSfstec_bduRU
Novell Inc. SUSE Linux Enterprise High Performance Computing≤ 15 SP7fstec_bduRU
Novell Inc. SUSE Linux Enterprise High Performance Computing≤ 15 SP5-ESPOSfstec_bduRU
Novell Inc. SUSE Linux Enterprise High Performance Computing≤ 15 SP4-ESPOSfstec_bduRU
Novell Inc. SUSE Linux Enterprise Micro≤ 5.5fstec_bduRU
Novell Inc. SUSE Linux Enterprise Micro≤ 5.4fstec_bduRU
Novell Inc. SUSE Linux Enterprise Micro≤ 5.3fstec_bduRU

showing 20 of 46

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2568Xen: Mehrere SchwachstellenDeutsch2026-07-28csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Xen ausnutzen, um seine Privilegien zu erhöhen, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand auszulösen.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2026-07-28modified 2026-10-07

references (7)

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.

Free scan