A vulnerability, which was classified as problematic, was found in Xen (Virtualization Software) (version now known). This affects some unknown processing of the component Linux Block Device. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740). Additionally the granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend (CVE-2022-33741, CVE-2022-33742).

The weakness was presented 07/05/2022. It is possible to read the advisory at xenbits.xenproject.org. This vulnerability is uniquely identified as CVE-2022-33740 since 06/15/2022. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Applying a patch is able to eliminate this problem.

See VDB-203224, VDB-203225 and VDB-203232 for similar entries.

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• Virtualization Software

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• Xen

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• open-source

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