CVE-2021-2086
Description
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is Prior to 6.1.18. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle VM VirtualBox. CVSS 3.1 Base Score 6.0 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H).
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
A high-privileged attacker with local access can cause a denial of service (hang or crash) in Oracle VM VirtualBox prior to 6.1.18, potentially affecting other products.
Vulnerability
CVE-2021-2086 is a denial-of-service vulnerability in the Core component of Oracle VM VirtualBox. The affected versions are prior to 6.1.18. The vulnerability is easily exploitable but requires an attacker with high privileges and the ability to log on to the system where VirtualBox is running.
Exploitation
An attacker must have high privileges on the host system and local logon access. Once logged in, the attacker can trigger the vulnerability to cause a hang or frequent repeatable crash of the VirtualBox process, leading to a complete denial of service.
Impact
Successful exploitation results in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle VM VirtualBox. The CVSS scope change indicates that the attack may also impact additional products beyond the vulnerable component, though confidentiality and integrity are not affected.
Mitigation
Oracle released a fix in version 6.1.18. The Gentoo security advisory [1] confirms there is no known workaround and recommends all users upgrade to at least version 6.1.18. Users should apply the update as soon as possible.
AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2- Range: <=6.1.18
- Range: unspecified
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- security.gentoo.org/glsa/202101-15mitrevendor-advisoryx_refsource_GENTOO
- www.oracle.com/security-alerts/cpujan2021.htmlmitrex_refsource_MISC
News mentions
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