CVE-2026-42492 Affecting xen package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published29 Jul 2026
- disclosed28 Jul 2026
Introduced: 28 Jul 2026
NewCVE-2026-42492 (opens in a new tab)How to fix?
There is no fixed version for Echo:latest xen.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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.