CVE-2026-42492 | BDVDB-2026-353233 Detail
XenXen
Description#
Xenstore, to have an up-to-date picture of the entire system, wants to know of domains appearing and disappearing. To make this more robust, a new XEN_DOMCTL_get_domain_state was introduced. The management of the bitmap underlying that operation is tied into the binding of the VIRQ_DOM_EXC virtual IRQ. Unfortunately an error path there would tear down the bitmap even in cases when it wasn't set up. Unprivileged domains can trigger that error path.
Impact#
An unprivileged domain can affect the operation of Xenstore, potentially leading to a Denial of Service (DoS) affecting the entire host. A hypervisor crash with similar host wide effect also is possible, albeit unlikely.
Weaknesses#
- CWE-459 Incomplete Cleanup
References#
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.