How severe is CVE-2024-31146?

CVE-2024-31146 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-31146 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-31146?

CVE-2024-31146 affects Xen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-31146?

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-2024-31146 have an EU (EUVD) identifier?

Yes. CVE-2024-31146 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-29056.

When was CVE-2024-31146 published?

CVE-2024-31146 was published on 2024-09-25 and last updated on 2026-06-17.

CVE-2024-31146

CVE-2024-31146 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-29056
Weakness: CWE-400
Affected product: Xen
Published: 2024-09-25
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2024-31146?: 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.
How severe is CVE-2024-31146?: CVE-2024-31146 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-31146 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-31146?: CVE-2024-31146 affects Xen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-31146?: 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-2024-31146 have an EU (EUVD) identifier?: Yes. CVE-2024-31146 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-29056.
When was CVE-2024-31146 published?: CVE-2024-31146 was published on 2024-09-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:*

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