Host denial of service via VT-d cleanup race
Published Apr 5, 2022 · Updated Aug 3, 2024
Race condition in Xen 4.11 through 4.16 allows guest OS users with passed-through devices to cause a host-wide service interruption. VT-d domain-ID cleanup races with allocation, leaking remapped IDs and allowing required IOMMU flushes to be bypassed. Only x86 hosts using VT-d IOMMU hardware are exposed; the vendor identifies denial of service as typical and does not rule out privilege escalation or information disclosure.
Summary
What happened
Race condition in Xen 4.11 through 4.16 allows guest OS users with passed-through devices to cause a host-wide service interruption. VT-d domain-ID cleanup races with allocation, leaking remapped IDs and allowing required IOMMU flushes to be bypassed. Only x86 hosts using VT-d IOMMU hardware are exposed; the vendor identifies denial of service as typical and does not rule out privilege escalation or information disclosure.
The record
- CVE
- CVE-2022-26357
- Published
- Apr 5, 2022
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-362, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 5, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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