Description
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that are affected are 7.1.14 and 7.2.4. Easily exploitable vulnerability allows unauthenticated 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 (scope change). Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle VM VirtualBox. Note: This vulnerability applies to Windows VMs only. CVSS 3.1 Base Score 7.1 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Oracle | Oracle VM VirtualBox | 7.1.14, 7.2.4 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | virtualbox | No fix yet | — |
| Ubuntu 26.04 LTS | virtualbox | No fix yet | — |
| Ubuntu 25.10 | virtualbox | No fix yet | — |
| Ubuntu 24.04 LTS | virtualbox | No fix yet | — |
| Ubuntu 22.04 LTS | virtualbox | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | virtualbox | No fix yet | — |
| Ubuntu 18.04 LTS | virtualbox | No fix yet | — |
| Ubuntu 16.04 LTS | virtualbox | No fix yet | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
MohaBars/CVE-2026-21986-VirtualBox-DoS ★ 0 · Apr 27, 2026
CVE-2026-21986: VirtualBox Shared Folders kernel memory exhaustion DoS
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- WID-SEC-2026-0172 Oracle Virtualization: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 1, 2026
References
- Oracle Advisory vendor-advisory