PT-2026-3704 · Oracle+1 · Virtualbox+1

Gangmin Kim + 2 · Published 2026-01-01 · Updated 2026-05-12 · CVE-2026-21956

Positive Technologies (AI Summary)

CVSS v3.1

8.2

High

Base vector

AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Oracle VM VirtualBox versions 7.1.14 and 7.2.4

Description An easily exploitable issue exists in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). A high-privileged attacker with access to the infrastructure where Oracle VM VirtualBox runs can compromise the software. Successful attacks can lead to a takeover of Oracle VM VirtualBox and may significantly impact additional products.

Recommendations Update Oracle VM VirtualBox version 7.1.14 to a newer, fixed version. Update Oracle VM VirtualBox version 7.2.4 to a newer, fixed version.

Fix

LPE

RCE

Resource Exhaustion

Weakness Enumeration

CWE-20

CWE-400

Related Identifiers

BDU:2026-00840

CVE-2026-21956

ZDI-26-103

Affected Products

Virtualbox

Red Os

References · 18

• https://osv.dev/vulnerability/CVE-2026-21956 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-21956 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-26-103 · Security Note
• https://bdu.fstec.ru/vul/2026-00840 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-21956 · Security Note
• https://oracle.com/security-alerts/cpujan2026.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-21956 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-21956 · Security Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/uyazvimost-virtualbox-cve-2026-21956-7.3 · Note
• https://redos.red-soft.ru/search/?iblock_id=24&q=CVE-2026-21956 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti-red-os-8-0/uyazvimost-virtualbox-cve-2026-21956-8.0 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti-red-os-8-0/uyazvimost-virtualbox-guest-additions-cve-2026-21956-8.0 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti-red-os-8-0/uyazvimost-virtualbox-kmod-cve-2026-21956-8.0 · Note
• https://cybersecurity-help.cz/vdb/SB20260120194 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-21956 · Note