CVE-2026-42487
x86 HVM I/O port list traversal
- State
- Published
- Severity
- 7.9 High
- Published
- Jun 18, 2026
- Updated
- Jun 18, 2026
- Reserved
- Apr 27, 2026
Description
HVM guest I/O port accesses are subject to either emulation or at least translation. Translations are managed by the device model (via XEN_DOMCTL_ioport_mapping), and hence the linked list used may changed at any time. Traversal of those lists (while handling guest I/O port accesses) therefore needs synchronizing with updates, which was missing so far.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.9 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H | CISA-ADP |
Weaknesses
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Affected Products
| Product | Versions |
|---|---|
XenXen |
|
References
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