How severe is CVE-2024-31143?

CVE-2024-31143 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-31143 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-31143?

CVE-2024-31143 affects Xen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-31143?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-31143 have an EU (EUVD) identifier?

Yes. CVE-2024-31143 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-29053.

When was CVE-2024-31143 published?

CVE-2024-31143 was published on 2024-07-18 and last updated on 2026-06-17.

CVE-2024-31143

CVE-2024-31143 is a high-severity vulnerability in Xen with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-832.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-29053
Weakness: CWE-832
Affected product: Xen
Published: 2024-07-18
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2024-31143?: 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.
How severe is CVE-2024-31143?: CVE-2024-31143 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-31143 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-31143?: CVE-2024-31143 affects Xen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-31143?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-31143 have an EU (EUVD) identifier?: Yes. CVE-2024-31143 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-29053.
When was CVE-2024-31143 published?: CVE-2024-31143 was published on 2024-07-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*

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