CVE-2026-42487EPSS p0.8%

CVE-2026-42487CVE-2026-42487

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.

Scoring

CVSS 7.9 ()
VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H
EPSS0.10% probability of exploitation · percentile 0.8% · 2026-08-03T12:00:16Z
Last modified2026-06-18
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.