PT-2026-48243 · Xen+4 · Xen
CVSS v3.1
5.3
Medium
| Vector | AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H |
[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] To create and manage guests, domctl operations are used by the control domain, a possible Xenstore domain, or by a domain controlling a particular guest. Some of these operations may not be executed in parallel, so a system-wide lock is used. The way that lock is acquired is, however, not providing any fairness. This is CVE-2026-42489. Furthermore, with XSM/Flask in use, the lock acquire will, for some operations, occur ahead of any permission checking. This is CVE-2026-42490.
Fix
Improper Locking
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Weakness Enumeration
Related Identifiers
Affected Products
Xen