CVE-2026-42487
x86 HVM I/O port list traversal
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.
INFO
Published Date :
June 18, 2026, 1:46 p.m.
Last Modified :
June 18, 2026, 1:46 p.m.
Remotely Exploit :
No
Source :
XEN
Affected Products
The following products are affected by CVE-2026-42487
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Implement proper locking for I/O port mapping list.
- Ensure atomic updates to the I/O port mapping structure.
- Review and synchronize device model I/O port access.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42487 vulnerability anywhere in the article.