Resource exhaustion in Xen
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.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.002 (14.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Xen — versions consult Xen advisory XSA-461
Weakness classification (CWE)
References
- security@xen.org (Patch, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2024-31146?
- CVE-2024-31146 is a high-severity vulnerability in Xen, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2024-09-25.
- How severe is CVE-2024-31146?
- High severity. CVSS v3 base score is 7.5 out of 10.