VULNERABILITY INTELLIGENCE
CVE-2026-42487
CVSS score7.9 HIGH
EPSS probability0.10%
CISA KEVNot currently listed
Published2026-06-18
Last modified2026-06-22
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H
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.
Weakness classification
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-362