Debian dsa-6424 : libxen-dev - security update

critical Nessus Plugin ID 333555

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6424 advisory.

- ------------------------------------------------------------------------- Debian Security Advisory DSA-6424-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff August 09, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : xen CVE ID : CVE-2025-10263 CVE-2025-54505 CVE-2025-54518 CVE-2026-23554 CVE-2026-23555 CVE-2026-23556 CVE-2026-23557 CVE-2026-23558 CVE-2026-42487 CVE-2026-42488 CVE-2026-42489 CVE-2026-42490 CVE-2026-42493 CVE-2026-42494 CVE-2026-42495 CVE-2026-62423 CVE-2026-62424 CVE-2026-62425 CVE-2026-62426 CVE-2026-62427 CVE-2026-62428 CVE-2026-62429 CVE-2026-62430 CVE-2026-62431 CVE-2026-62432 CVE-2026-62433 CVE-2026-62434 CVE-2026-62435 CVE-2026-62436

Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in privilege escalation, information disclosure or denial of service.

For the stable distribution (trixie), these problems have been fixed in version 4.20.3+127-gc42374a105-0+deb13u1.

We recommend that you upgrade your xen packages.

For the detailed security status of xen please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/xen

Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/

Mailing list: [email protected]

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the libxen-dev packages.

Plugin Details

Severity: Critical

ID: 333555

File Name: debian_DSA-6424.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 8/9/2026

Updated: 8/9/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.5

Percentile: 98.46

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-23555

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.4

Threat Score: 7.6

Threat Vector: CVSS:4.0/E:U

Vector: 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

CVSS Score Source: CVE-2026-23556

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:libxen-dev, p-cpe:/a:debian:debian_linux:libxencall1, p-cpe:/a:debian:debian_linux:libxendevicemodel1, p-cpe:/a:debian:debian_linux:libxenevtchn1, p-cpe:/a:debian:debian_linux:libxenforeignmemory1, p-cpe:/a:debian:debian_linux:libxengnttab1, p-cpe:/a:debian:debian_linux:libxenhypfs1, p-cpe:/a:debian:debian_linux:libxenmisc4.20, p-cpe:/a:debian:debian_linux:libxenstore4, p-cpe:/a:debian:debian_linux:libxentoolcore1, p-cpe:/a:debian:debian_linux:libxentoollog1, p-cpe:/a:debian:debian_linux:xen-doc, p-cpe:/a:debian:debian_linux:xen-hypervisor-4.20-amd64-dbg, p-cpe:/a:debian:debian_linux:xen-hypervisor-4.20-amd64, p-cpe:/a:debian:debian_linux:xen-hypervisor-4.20-arm64-dbg, p-cpe:/a:debian:debian_linux:xen-hypervisor-4.20-arm64, p-cpe:/a:debian:debian_linux:xen-hypervisor-common, p-cpe:/a:debian:debian_linux:xen-system-amd64, p-cpe:/a:debian:debian_linux:xen-system-arm64, p-cpe:/a:debian:debian_linux:xen-utils-4.20-dbg, p-cpe:/a:debian:debian_linux:xen-utils-4.20, p-cpe:/a:debian:debian_linux:xen-utils-common, p-cpe:/a:debian:debian_linux:xenstore-utils

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 8/9/2026

Vulnerability Publication Date: 3/19/2026

Reference Information

CVE: CVE-2025-10263, CVE-2025-54505, CVE-2025-54518, CVE-2026-23554, CVE-2026-23555, CVE-2026-23556, CVE-2026-23557, CVE-2026-23558, CVE-2026-42487, CVE-2026-42488, CVE-2026-42489, CVE-2026-42490, CVE-2026-42493, CVE-2026-42494, CVE-2026-42495, CVE-2026-62423, CVE-2026-62424, CVE-2026-62425, CVE-2026-62426, CVE-2026-62427, CVE-2026-62428, CVE-2026-62429, CVE-2026-62430, CVE-2026-62431, CVE-2026-62432, CVE-2026-62433, CVE-2026-62434, CVE-2026-62435, CVE-2026-62436

Detections

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