CVEvulnerability
CVE-2026-42492
7.5 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2026-07-28
- Last modified
- 2026-07-28
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-459
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.
Related
Weakness · CWE (1)
- CWE-459 Incomplete Cleanup weakness
References
- https://xenbits.xenproject.org/xsa/advisory-496.html xenbits.xenproject.org
- http://www.openwall.com/lists/oss-security/2026/07/28/13 www.openwall.com
- http://xenbits.xen.org/xsa/advisory-496.html xenbits.xen.org