SB20260120194 - Multiple vulnerabilities in Oracle VM VirtualBox
Published: January 20, 2026 Updated: February 19, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 14 vulnerabilities.
1) Improper input validation (CVE-ID: CVE-2026-21981)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local privileged user to read memory contents or crash the application.
The vulnerability exists due to improper input validation within the Core component in Oracle VM VirtualBox. A local privileged user can exploit this vulnerability to read memory contents or crash the application.
2) Out-of-bounds read (CVE-ID: CVE-2026-21985)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a boundary condition within the LsiLogic module. A local user can trigger an out-of-bounds read error and read contents of memory on the system.
3) Out-of-bounds read (CVE-ID: CVE-2026-21963)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a boundary condition within the BusLogic module. A local user can trigger an out-of-bounds read error and read contents of memory on the system.
4) Improper input validation (CVE-ID: CVE-2026-21986)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local non-authenticated attacker to a crash the entire system.
The vulnerability exists due to improper input validation within the Core component in Oracle VM VirtualBox. A local non-authenticated attacker can exploit this vulnerability to a crash the entire system.
5) Improper input validation (CVE-ID: CVE-2026-21982)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
The vulnerability exists due to improper input validation within the Core component in Oracle VM VirtualBox. A remote non-authenticated attacker can exploit this vulnerability to execute arbitrary code.
6) Race condition (CVE-ID: CVE-2026-21984)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in VMSVGA device. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
7) Heap-based buffer overflow (CVE-ID: CVE-2026-21983)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the VMSVGA device. A local privileged user can trigger a heap-based buffer overflow and execute arbitrary code on the target system.
8) Out-of-bounds write (CVE-ID: CVE-2026-21957)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the VMSVGA device. A local user can trigger an out-of-bounds write and execute arbitrary code in the context of the hypervisor.
9) Improper input validation (CVE-ID: CVE-2026-21989)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local privileged user to compromise the affected system.
The vulnerability exists due to improper input validation within the Core component in Oracle VM VirtualBox. A local privileged user can exploit this vulnerability to compromise the affected system.
10) Improper input validation (CVE-ID: CVE-2026-21990)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local privileged user to execute arbitrary code.
The vulnerability exists due to improper input validation within the Core component in Oracle VM VirtualBox. A local privileged user can exploit this vulnerability to execute arbitrary code.
11) Improper input validation (CVE-ID: CVE-2026-21988)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local privileged user to execute arbitrary code.
The vulnerability exists due to improper input validation within the Core component in Oracle VM VirtualBox. A local privileged user can exploit this vulnerability to execute arbitrary code.
12) Improper input validation (CVE-ID: CVE-2026-21987)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local privileged user to execute arbitrary code.
The vulnerability exists due to improper input validation within the Core component in Oracle VM VirtualBox. A local privileged user can exploit this vulnerability to execute arbitrary code.
13) Out-of-bounds write (CVE-ID: CVE-2026-21956)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the VMSVGA device. A local user can trigger an out-of-bounds write and execute arbitrary code in the context of the hypervisor.
14) Use-after-free (CVE-ID: CVE-2026-21955)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the VMSVGA devic. A local user can trigger a use-after-free error and execute arbitrary code in the context of the hypervisor.
Remediation
Install update from vendor's website.