CVE-2024-45817
Last modified
CVE-2024-45817 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. In x86's APIC (Advanced Programmable Interrupt Controller) architecture, error conditions are reported in a status register. Furthermore, the OS can opt to receive an interrupt when a new error occurs. It is possible to configure the error interrupt with an illegal vector, which generates an error when an error interrupt is raised. This case causes Xen to recurse through vlapic_error(). EPSS estimates a 0.55% chance of exploitation in the next 30 days.
Description
In x86's APIC (Advanced Programmable Interrupt Controller) architecture, error conditions are reported in a status register. Furthermore, the OS can opt to receive an interrupt when a new error occurs. It is possible to configure the error interrupt with an illegal vector, which generates an error when an error interrupt is raised. This case causes Xen to recurse through vlapic_error(). The recursion itself is bounded; errors accumulate in the the status register and only generate an interrupt when a new status bit becomes set. However, the lock protecting this state in Xen will try to be taken recursively, and deadlock.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | >= 4.5.0 |
References
- https://xenbits.xenproject.org/xsa/advisory-462.htmlPatch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2024/09/24/1Mailing List, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-462.htmlPatch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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