CVE-2026-42489
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
18/06/2026
Last modified:
22/06/2026
Description
[This CNA information record relates to multiple CVEs; the<br />
text explains which aspects/vulnerabilities correspond to which CVE.]<br />
<br />
To create and manage guests, domctl operations are used by the control<br />
domain, a possible Xenstore domain, or by a domain controlling a<br />
particular guest. Some of these operations may not be executed in<br />
parallel, so a system-wide lock is used. The way that lock is acquired<br />
is, however, not providing any fairness. This is CVE-2026-42489.<br />
<br />
Furthermore, with XSM/Flask in use, the lock acquire will, for some<br />
operations, occur ahead of any permission checking. This is<br />
CVE-2026-42490.
Impact
Base Score 3.x
5.30
Severity 3.x
MEDIUM