CVE-2024-31143

Summary

An optional feature of PCI MSI called "Multiple Message" allows a device to use multiple consecutive interrupt vectors. Unlike for MSI-X, the setting up of these consecutive vectors needs to happen all in one go. In this handling an error path could be taken in different situations, with or without a particular lock held. This error path wrongly releases the lock even when it is not currently held.

Affected Software

Weaknesses

Workarounds

Not passing through multi-vector MSI capable devices to x86 guests will avoid the vulnerability.

ADP Enrichment

CVE Program Container

Additional References

• https://xenbits.xenproject.org/xsa/advisory-458.html
• http://www.openwall.com/lists/oss-security/2024/07/16/3
• http://xenbits.xen.org/xsa/advisory-458.html

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

References

• https://xenbits.xenproject.org/xsa/advisory-458.html

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