A vulnerability was found in Xen (Virtualization Software) (the affected version unknown). It has been classified as critical. This affects some unknown functionality of the component IRQ Management. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-416. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Insufficient cleanup of passed-through device IRQs The management of IRQs associated with physical devices exposed to x86 HVM guests involves an iterative operation in particular when cleaning up after the guest's use of the device. In the case where an interrupt is not quiescent yet at the time this cleanup gets invoked, the cleanup attempt may be scheduled to be retried. When multiple interrupts are involved, this scheduling of a retry may get erroneously skipped. At the same time pointers may get cleared (resulting in a de-reference of NULL) and freed (resulting in a use-after-free), while other code would continue to assume them to be valid.

The weakness was released 01/25/2022. It is possible to read the advisory at xenbits.xenproject.org. This vulnerability is uniquely identified as CVE-2022-23035 since 01/10/2022. The exploitability is told to be easy. The attack can only be initiated within the local network. A authentication is required for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/28/2022).

Applying a patch is able to eliminate this problem.

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Type

• Virtualization Software

Name

• Xen

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