Hypervisor memory disclosure via uninitialized LsiLogic memory
Published Jan 20, 2026 · Updated Jan 20, 2026
Information disclosure in Oracle VM VirtualBox Core 7.1.14 and 7.2.4 allows local users to read hypervisor memory through a guest VM. The LsiLogic module accesses memory before properly initializing it, returning residual data from the hypervisor context to the guest. Exploitation requires high-privileged code execution in the guest; the disclosure can expose critical VirtualBox-accessible data and support a separate hypervisor-compromise chain.
Summary
What happened
Information disclosure in Oracle VM VirtualBox Core 7.1.14 and 7.2.4 allows local users to read hypervisor memory through a guest VM. The LsiLogic module accesses memory before properly initializing it, returning residual data from the hypervisor context to the guest. Exploitation requires high-privileged code execution in the guest; the disclosure can expose critical VirtualBox-accessible data and support a separate hypervisor-compromise chain.
The record
- CVE
- CVE-2026-21985
- Published
- Jan 20, 2026
- Updated
- Jan 20, 2026
- Vendor
- Oracle
- Product
- Oracle VM VirtualBox
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Jan 20, 2026CVE publishedPublication date reported by the CVE source.
- Jan 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=7.1.14
- Affected versionversion=7.2.4
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
No sourced classifications are available.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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