What’s Vulnerable › Vulnerabilities

CVE-2024-31146: PCI device pass-through with shared resources

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-25 · updated 2026-06-17
• Weakness: CWE-400

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.

Affected products

• xen: all versions

References

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

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