Critical Vulnerability in Xen Package: Page Mapping Issues Leading to Domain Boundary Violations
Summary
CVE-2025-58145: [This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] There are two issues related to the mapping of pages belonging to other domains: For one, a... Affects xen versions < 4.18.5-r2. Fixed in 4.18.5-r2. How to fix ↓
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Background
Xen is an open-source hypervisor that allows multiple operating systems to run concurrently on a single physical machine. It is widely used for virtualization in cloud computing environments. The Xen package is crucial for managing virtual machines and ensuring efficient resource allocation. However, it has recently been identified to have vulnerabilities that could compromise the integrity of domain boundaries, potentially allowing unauthorized access to sensitive data.
Vulnerability Detail
The vulnerability, identified as CVE-2025-58145, arises from improper handling of page mappings belonging to different domains. Specifically, an assertion failure can lead to a NULL pointer dereference in release builds, while the P2M lock is not held during page reference acquisition. This oversight can allow for changes in page type and ownership, violating domain boundaries and enabling potential security breaches.
How To Fix
Minimum fixed version
4.18.5-r2
This is the first release that contains the fix.
sudo apk add --upgrade xenTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can limit the exposure of their virtual machines by implementing stricter access controls and monitoring domain interactions. However, this is not a substitute for applying the necessary patches.
Conclusion
CVE-2025-58145 represents a significant security risk for users of the Xen package, with the potential to compromise domain boundaries. It is crucial for users to apply the necessary patches promptly and consider temporary workarounds until they can fully secure their systems.
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FAQ
CVE-2025-58145 is a critical vulnerability in the Xen package that can lead to domain boundary violations due to improper handling of page mappings.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If exploited, this vulnerability could allow unauthorized access to sensitive data across different domains, compromising the security of virtualized environments.
Yes, patches are available for various versions of the Xen package. Users should update to the specified patched versions to mitigate the risk.
If immediate patching is not possible, consider implementing stricter access controls and monitoring domain interactions as a temporary workaround.
References
Related vulnerabilities
Recent vulnerabilities recorded for xen.
