PVH guests have their ACPI tables constructed by the toolstack. The construction involves building the tables in local memory, which are then copied into guest memory. While actually used parts of the local memory are filled in correctly, excess space that is being allocated is left with its prior contents.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - The hypervisor contains code to accelerate VGA memory accesses for HVM guests, when the (virtual) VGA is
    in "standard" mode. Locking involved there has an unusual discipline, leaving a lock acquired past the
    return from the function that acquired it. This behavior results in a problem when emulating an
    instruction with two memory accesses, both of which touch VGA memory (plus some further constraints which
    aren't relevant here). When emulating the 2nd access, the lock that is already being held would be
    attempted to be re-acquired, resulting in a deadlock. This deadlock was already found when the code was
    first introduced, but was analysed incorrectly and the fix was incomplete. Analysis in light of the new
    finding cannot find a way to make the existing locking discipline work. In staging, this logic has all
    been removed because it was discovered to be accidentally disabled since Xen 4.7. Therefore, we are fixing
    the locking problem by backporting the removal of most of the feature. Note that even with the feature
    disabled, the lock would still be acquired for any accesses to the VGA MMIO region. (CVE-2024-45818)

  - PVH guests have their ACPI tables constructed by the toolstack. The construction involves building the
    tables in local memory, which are then copied into guest memory. While actually used parts of the local
    memory are filled in correctly, excess space that is being allocated is left with its prior contents.
    (CVE-2024-45819)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - PVH guests have their ACPI tables constructed by the toolstack. The construction involves building the     tables in local memory, which are then copied into guest memory. While actually used parts of the local     memory are filled in correctly, excess space that is being allocated is left with its prior contents.
    (CVE-2024-45819)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-933a9a977e advisory.

    work around debugedit bug to fix aarch64 builds     xen-hypervisor %post doesn't load all needed grub2 modules     update to xen-4.19.1 which includes     Deadlock in x86 HVM standard VGA handling [XSA-463, CVE-2024-45818]     libxl leaks data to PVH guests via ACPI tables [XSA-464, CVE-2024-45819]

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

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

The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5836 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5836-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     December 26, 2024                     https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : xen     CVE ID         : CVE-2023-28746 CVE-2023-46841 CVE-2023-46842 CVE-2024-2193                      CVE-2024-2201 CVE-2024-31142 CVE-2024-31143 CVE-2024-31145                      CVE-2024-31146 CVE-2024-45817 CVE-2024-45818 CVE-2024-45819

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

    For the stable distribution (bookworm), these problems have been fixed in     version 4.17.5+23-ga4e5191dc0-1.

    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: debian-security-announce@lists.debian.org

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.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:4163-1 advisory.

    Security issues fixed:

    - CVE-2024-45818: xen: Deadlock in x86 HVM standard VGA handling (bsc#1232622)
    - CVE-2024-45819: xen: libxl leaks data to PVH guests via ACPI tables (bsc#1232624)
    - CVE-2024-45817: xen: x86: Deadlock in vlapic_error() (bsc#1230366)

    Non-security issues fixed:

    - Removed usage of net-tools-deprecated from supportconfig plugin (bsc#1232542)
    - Upstream bug fixes (bsc#1027519)

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

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:4073-1 advisory.

    Security issues fixed:

    - CVE-2024-45818: xen: Deadlock in x86 HVM standard VGA handling (bsc#1232622)
    - CVE-2024-45819: xen: libxl leaks data to PVH guests via ACPI tables (bsc#1232624)
    - CVE-2024-45817: xen: x86: Deadlock in vlapic_error() (bsc#1230366)

    Non-security issue fixed:

    - Removed usage of net-tools-deprecated from supportconfig plugin (bsc#1232542)

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

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:4116-1 advisory.

    - CVE-2024-45818: Fixed deadlock in x86 HVM standard VGA handling (XSA-463) (bsc#1232622).
    - CVE-2024-45819: Fixed libxl data leaks to PVH guests via ACPI tables (XSA-464) (bsc#1232624).

    Bug fixes:

    - Remove usage of net-tools-deprecated from supportconfig plugin (bsc#1232542).

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

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

The remote Fedora 40 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2024-7c2cfa2fe5 advisory.

    Deadlock in x86 HVM standard VGA handling [XSA-463, CVE-2024-45818]     libxl leaks data to PVH guests via ACPI tables [XSA-464, CVE-2024-45819]

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

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:3977-1 advisory.

    - CVE-2024-45818: Fixed deadlock in x86 HVM standard VGA handling (XSA-463) (bsc#1232622).
    - CVE-2024-45819: Fixed libxl data leaks to PVH guests via ACPI tables (XSA-464) (bsc#1232624).

    Bug fixes:

    - Remove usage of net-tools-deprecated from supportconfig plugin (bsc#1232542).

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

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

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:3979-1 advisory.

    Security issues fixed:

    - CVE-2024-45818: xen: Deadlock in x86 HVM standard VGA handling (bsc#1232622)
    - CVE-2024-45819: xen: libxl leaks data to PVH guests via ACPI tables (bsc#1232624)

    Non-security issue fixed:

    - Xen host hung at boot up with repeated '(XEN) APIC error on CPU on CPU53: 40(40), Received illegal     vector' (bsc#1231046)

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

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

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:3980-1 advisory.

    Security issues fixed:

    - CVE-2024-45818: xen: Deadlock in x86 HVM standard VGA handling (bsc#1232622)
    - CVE-2024-45819: xen: libxl leaks data to PVH guests via ACPI tables (bsc#1232624)
    - CVE-2024-45817: xen: x86: Deadlock in vlapic_error() (bsc#1230366)

    Non-security issues fixed:

    - Removed usage of net-tools-deprecated from supportconfig plugin (bsc#1232542)
    - Upstream bug fixes (bsc#1027519)

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

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

ID	Name	Product	Family	Severity
424727	Alpine: multiple xen packages: security update to 4.19.0-r1	Tenable Cloud Security	Alpine Linux Local Security Checks	medium
424727	Alpine: multiple xen packages: security update to 4.19.0-r1	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	medium
229317	Linux Distros Unpatched Vulnerability : CVE-2024-45819	Nessus	Misc.	medium
213990	Fedora 41 : xen (2025-933a9a977e)	Nessus	Fedora Local Security Checks	medium
213392	Debian dsa-5836 : libxen-dev - security update	Nessus	Debian Local Security Checks	high
212564	SUSE SLED15: xen / xen-devel / xen-doc-html / xen-libs / xen-libs-32bit / etc (SUSE-SU-2024:4163-1)	Nessus	SuSE Local Security Checks	high
212530	SUSE SLES15: xen / xen-devel / xen-libs / xen-tools / xen-tools-domU / etc (SUSE-SU-2024:4073-1)	Nessus	SuSE Local Security Checks	high
212521	SUSE SLES15 Security Update : xen (SUSE-SU-2024:4116-1)	Nessus	SuSE Local Security Checks	medium
211964	Fedora 40 : xen (2024-7c2cfa2fe5)	Nessus	Fedora Local Security Checks	medium
211390	SUSE SLES15: xen / xen-devel / xen-libs / xen-tools / xen-tools-domU / etc (SUSE-SU-2024:3977-1)	Nessus	SuSE Local Security Checks	medium
211389	SUSE SLES12: xen / xen-doc-html / xen-libs / xen-libs-32bit / xen-tools / etc (SUSE-SU-2024:3979-1)	Nessus	SuSE Local Security Checks	medium
408551	Alpine: xen: security update to 4.17.5-r2	Tenable Cloud Security	Alpine Linux Local Security Checks	medium
408551	Alpine: xen: security update to 4.17.5-r2	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	medium
408549	Alpine: xen: security update to 4.16.6-r3	Tenable Cloud Security	Alpine Linux Local Security Checks	medium
408549	Alpine: xen: security update to 4.16.6-r3	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	medium
408548	Alpine: xen: security update to 4.18.3-r2	Tenable Cloud Security	Alpine Linux Local Security Checks	medium
408548	Alpine: xen: security update to 4.18.3-r2	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	medium
210883	SUSE SLED15: xen / xen-devel / xen-doc-html / xen-libs / xen-libs-32bit / etc (SUSE-SU-2024:3980-1)	Nessus	SuSE Local Security Checks	high

Detections

Analytics

CVE-2024-45819

medium

Tenable Plugins

medium

medium

medium

medium

high

high

high

medium

medium

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medium

medium

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medium

medium

high