PT-2026-3728 · Oracle+1 · Virtualbox+1

Yuhao Jiang · Published 2026-01-01 · Updated 2026-03-19 · CVE-2026-21981

Positive Technologies (AI Summary)

CVSS v3.1

4.6

Medium

Base vector

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

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 system where Oracle VM VirtualBox runs can compromise the software. Successful exploitation may lead to unauthorized read access to some Oracle VM VirtualBox data and a partial denial of service. Attacks may impact additional products.

Recommendations Update Oracle VM VirtualBox to a version later than 7.1.14. Update Oracle VM VirtualBox to a version later than 7.2.4.

Fix

DoS

Out of bounds Read

Improper Privilege Management

Weakness Enumeration

CWE-125

CWE-269

Related Identifiers

BDU:2026-00721

CVE-2026-21981

Affected Products

Virtualbox

Red Os

References · 18

• https://nvd.nist.gov/vuln/detail/CVE-2026-21981 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-21981 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-21981 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-21981 · Vendor Advisory
• https://oracle.com/security-alerts/cpujan2026.html · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-21981 · Security Note
• https://bdu.fstec.ru/vul/2026-00721 · Security Note
• https://twitter.com/CVEnew/status/2013740402302493181 · Twitter Post
• https://t.me/CVEtracker/42636 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2013808114802295111 · Twitter Post
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti-red-os-8-0/uyazvimost-virtualbox-cve-2026-21981-8.0 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-21981 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti-red-os-8-0/uyazvimost-virtualbox-kmod-cve-2026-21981-8.0 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/uyazvimost-virtualbox-guest-additions-cve-2026-21981-7.3 · Note
• https://cybersecurity-help.cz/vdb/SB20260120194 · Note