CVE-2024-45819

libxl leaks data to PVH guests via ACPI tables

Published Dec 19, 2024 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Workaround

Running only PV or HVM guests will avoid this vulnerability.

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-5836-1 xen security update
History
Type Values Removed Values Added
CPEs cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*
Type Values Removed Values Added
Metrics epss

{'score': 0.00034}

epss

{'score': 0.00026}

Type Values Removed Values Added
Metrics epss

{'score': 0.00029}

epss

{'score': 0.00034}

Type Values Removed Values Added
Metrics epss

{'score': 0.00035}

epss

{'score': 0.00029}

Type Values Removed Values Added
Weaknesses CWE-276
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title libxl leaks data to PVH guests via ACPI tables
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
XEN
Published
Updated
Dec 31, 2024, 6:57 PM
Reserved
Sep 9, 2024, 2:43 PM
Status
Analyzed
Published
Dec 19, 2024, 12:15 PM
Modified
Jun 17, 2026, 7:54 AM