Memory leak in Xen - CVE-2026-62437

Vulnerability identifier: #VU147399

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-62437

CWE-ID: CWE-401

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper cleanup of IRQ tracking structures in Xen\'s PCI device and IRQ cleanup handling when an HVM guest with assigned PCI devices is being terminated. A local user can cause the device model to bind IRQs anew during guest termination to cause a denial of service.

Xen
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Basesystem Module
Server Applications Module
openSUSE Leap
xen-libs-debuginfo-32bit
xen-libs
xen-tools-domU-debuginfo
xen-libs-debuginfo
xen-debugsource
xen
xen-tools-domU
xen-doc-html
xen-tools
xen-libs-32bit
xen-tools-debuginfo
xen-devel
xen-tools-xendomains-wait-disk
xen-libs-32bit-debuginfo

Install security update from vendor's website.

xen-libs-debuginfo-32bit - update to 4.12.4_74-3.151.1
xen-libs - addressed in versions 4.12.4_74-3.151.1, 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1, 4.20.4_04-150700.3.46.1
xen-tools-domU-debuginfo - addressed in versions 4.12.4_74-3.151.1, 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1, 4.20.4_04-150700.3.46.1
xen-libs-debuginfo - addressed in versions 4.12.4_74-3.151.1, 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1, 4.20.4_04-150700.3.46.1
xen-debugsource - addressed in versions 4.12.4_74-3.151.1, 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1, 4.20.4_04-150700.3.46.1
xen - addressed in versions 4.12.4_74-3.151.1, 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1, 4.20.4_04-150700.3.46.1
xen-tools-domU - addressed in versions 4.12.4_74-3.151.1, 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1, 4.20.4_04-150700.3.46.1
xen-doc-html - addressed in versions 4.12.4_74-3.151.1, 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1
xen-tools - addressed in versions 4.12.4_74-3.151.1, 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1, 4.20.4_04-150700.3.46.1
xen-libs-32bit - addressed in versions 4.12.4_74-3.151.1, 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1
xen-tools-debuginfo - addressed in versions 4.12.4_74-3.151.1, 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1, 4.20.4_04-150700.3.46.1
xen-devel - addressed in versions 4.12.4_74-3.151.1, 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1, 4.20.4_04-150700.3.46.1
xen-tools-xendomains-wait-disk - addressed in versions 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1, 4.20.4_04-150700.3.46.1
xen-libs-32bit-debuginfo - addressed in versions 4.16.7_14-150400.4.92.1, 4.17.6_16-150500.3.79.1

• https://xenbits.xen.org/xsa/advisory-509.html

• Multiple vulnerabilities in Xen
• SUSE update for xen
• SUSE update for xen
• SUSE update for xen
• SUSE update for xen