CVE-2024-31146

Description

When multiple devices share resources and one of them is to be passed through to a guest, security of the entire system and of respective guests individually cannot really be guaranteed without knowing internals of any of the involved guests. Therefore such a configuration cannot really be security-supported, yet making that explicit was so far missing. Resources the sharing of which is known to be problematic include, but are not limited to - - PCI Base Address Registers (BARs) of multiple devices mapping to the same page (4k on x86), - - INTx lines.

CVSS Metrics

• v3.1•HIGH•Score: 7.5CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.07%• Percentile: 22%

Techniques & Countermeasures

• CWE-400•Uncontrolled Resource Consumption

  The product does not properly control the allocation and maintenance of a limited resource.

Affected Systems

• xen•xen

  na

References (3)

• https://xenbits.xenproject.org/xsa/advisory-461.html
• http://xenbits.xen.org/xsa/advisory-461.html
• http://www.openwall.com/lists/oss-security/2024/08/14/3