PT-2022-15802 · Xen+1 · Xen+1
Julien Grall
·
Published
2022-01-25
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Updated
2024-06-15
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CVE-2022-23035
CVSS v2.0
4.7
Medium
| Vector | AV:L/AC:M/Au:N/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Xen (affected versions not specified)
Description
The issue arises from insufficient cleanup of passed-through device IRQs associated with physical devices exposed to x86 HVM guests. This involves an iterative operation, particularly when cleaning up after the guest's use of the device. If an interrupt is not quiescent yet at the time this cleanup gets invoked, the cleanup attempt may be scheduled to be retried. However, 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.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
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Weakness Enumeration
Related Identifiers
Affected Products
Suse
Xen