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CVE-2021-2475

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The...

4.4 Medium

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is Prior to 6.1.28. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. 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 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
High
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.40%Unchanged since Oct 21, 2021
90%50%10%1%

What each source reports

CVE List Score used 4.4

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is Prior to 6.1.28. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. 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 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Record
CVE-2021-2475
CVSS 3.1
4.4 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
EUVDEUVD-2021-16933 4.4

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is Prior to 6.1.28. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. 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 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Record
EUVD-2021-16933
CVSS 3.1
4.4 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-v49c-x6pw-3x23 4.4

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The...

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is Prior to 6.1.28. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. 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 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Record
GHSA-v49c-x6pw-3x23
CVSS 3.1
4.4 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
NVD 4.4

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is Prior to 6.1.28. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. 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 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Record
CVE-2021-2475
CVSS 3.1
4.4 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
2.1 LowAV:L/AC:L/Au:N/C:N/I:N/A:P
Updated
2026-11-02
OSVUBUNTU-CVE-2021-2475 4.4

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is Prior to 6.1.28. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. 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 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Record
UBUNTU-CVE-2021-2475
CVSS 3.1
4.4 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVMGASA-2021-0488 No score

Updated virtualbox packages fix security vulnerabilities

This update provides the upstream 6.1.28 maintenance release that fixes at least the following security vulnerabilities:

Vulnerability in the Oracle VM VirtualBox prior to 6.1.28 contains an easily exploitable vulnerability that allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle VM VirtualBox (CVE-2021-2475, CVE-2021-35542).

Vulnerability in the Oracle VM VirtualBox prior to 6.1.28 contains an easily exploitable vulnerability that allows low privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. Successful attacks of this vulnerability can result in takeover of Oracle VM VirtualBox (CVE-2021-35538).

Vulnerability in the Oracle VM VirtualBox prior to 6.1.28 contains an easily exploitable vulnerability that allows low privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle VM VirtualBox (CVE-2021-35540).

Vulnerability in the Oracle VM VirtualBox prior to 6.1.28 contains an easily exploitable vulnerability that 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 and unauthorized read access to a subset of Oracle VM VirtualBox accessible data (CVE-2021-35545).

For other upstream fixes in this update, see the referenced changelog.

Record
MGASA-2021-0488
Updated
2026-11-02
OSVopenSUSE-SU-2021:1393-1 No score

Security update for virtualbox

This update for virtualbox fixes the following issues:

Version bump to 6.1.28 (released October 19 2021 by Oracle)

This is a maintenance release. The following items were fixed and/or added:

  • VMM: Fixed guru meditation while booting nested-guests accessing debug registers under certain conditions

  • UI: Bug fixes for touchpad-based scrolling

  • VMSVGA: Fixed VM black screen issue on first resize after restoring from saved state (bug #20067)

  • VMSVGA: Fixed display corruption on Linux Mint (bug #20513)

  • Storage: Fixed a possible write error under certain circumstances when using VHD images (bug #20512)

  • Network: Multiple updates in virtio-net device support

  • Network: Disconnecting cable in saved VM state now is handled properly by virtio-net

  • Network: More administrative control over network ranges, see user manual

  • NAT: Fixed not rejecting TFTP requests with absolute pathnames (bug #20589)

  • Audio: Fixed VM session aborting after PC hibernation (bug #20516)

  • Audio: Fixed setting the line-in volume of the HDA emulation on modern Linux guests

  • Audio: Fixed resuming playback of the AC'97 emulation while a snapshot has been taken

  • API: Added bindings support for Python 3.9 (bug #20252)

  • API: Fixed rare hang of VM when changing settings at runtime

  • Linux host: Improved kernel modules installation detection which prevents unnecessary modules rebuild

  • Host Services: Shared Clipboard: Prevent guest clipboard reset when clipboard sharing is disabled (bug #20487)

  • Host Services: Shared Clipboard over VRDP: Fixed to continue working when guest service reconnects to host (bug #20366)

  • Host Services: Shared Clipboard over VRDP: Fixed preventing remote RDP client to hang when guest has no clipboard data to report

  • Linux Host and Guest: Introduced initial support for kernels 5.14 and 5.15

  • Linux Host and Guest: Introduced initial support for RHEL 8.5 kernel

  • Windows Guest: Introduced Windows 11 guest support, including unattended installation

  • Fixes CVE-2021-35538, CVE-2021-35545, CVE-2021-35540, CVE-2021-35542, and CVE-2021-2475 (boo#1191869)

  • Use kernel_module_directory macro for kernel modules (boo#1191526)

  • Finish UsrMerge for VirtualBox components (boo#1191104).

Record
openSUSE-SU-2021:1393-1
Updated
2026-11-02
OSVopenSUSE-SU-2021:1403-1 No score

Security update for virtualbox

This update for virtualbox fixes the following issues:

Version bump to 6.1.28 (released October 19 2021 by Oracle)

This is a maintenance release. The following items were fixed and/or added:

  • VMM: Fixed guru meditation while booting nested-guests accessing debug registers under certain conditions

  • UI: Bug fixes for touchpad-based scrolling

  • VMSVGA: Fixed VM black screen issue on first resize after restoring from saved state (bug #20067)

  • VMSVGA: Fixed display corruption on Linux Mint (bug #20513)

  • Storage: Fixed a possible write error under certain circumstances when using VHD images (bug #20512)

  • Network: Multiple updates in virtio-net device support

  • Network: Disconnecting cable in saved VM state now is handled properly by virtio-net

  • Network: More administrative control over network ranges, see user manual

  • NAT: Fixed not rejecting TFTP requests with absolute pathnames (bug #20589)

  • Audio: Fixed VM session aborting after PC hibernation (bug #20516)

  • Audio: Fixed setting the line-in volume of the HDA emulation on modern Linux guests

  • Audio: Fixed resuming playback of the AC'97 emulation while a snapshot has been taken

  • API: Added bindings support for Python 3.9 (bug #20252)

  • API: Fixed rare hang of VM when changing settings at runtime

  • Linux host: Improved kernel modules installation detection which prevents unnecessary modules rebuild

  • Host Services: Shared Clipboard: Prevent guest clipboard reset when clipboard sharing is disabled (bug #20487)

  • Host Services: Shared Clipboard over VRDP: Fixed to continue working when guest service reconnects to host (bug #20366)

  • Host Services: Shared Clipboard over VRDP: Fixed preventing remote RDP client to hang when guest has no clipboard data to report

  • Linux Host and Guest: Introduced initial support for kernels 5.14 and 5.15

  • Linux Host and Guest: Introduced initial support for RHEL 8.5 kernel

  • Windows Guest: Introduced Windows 11 guest support, including unattended installation

  • Fixes CVE-2021-35538, CVE-2021-35545, CVE-2021-35540, CVE-2021-35542, and CVE-2021-2475 (boo#1191869)

  • Use kernel_module_directory macro for kernel modules (boo#1191526)

  • Finish UsrMerge for VirtualBox components (boo#1191104).

Record
openSUSE-SU-2021:1403-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
virtualbox
Mageia:8
From an advisory covering 5 CVEs
 before 6.1.28-1.mga8
6.1.28-1.mga8
kmod-virtualbox
Mageia:8
From an advisory covering 5 CVEs
 before 6.1.28-1.mga8
6.1.28-1.mga8
virtualbox
Ubuntu:16.04:LTS
 All versions, plus listed versions
5.0.4-dfsg-25.0.8-dfsg-15.0.10-dfsg-15.0.10-dfsg-25.0.10-dfsg-3
Show 25 moreShow less
5.0.10-dfsg-45.0.10-dfsg-55.0.10-dfsg-65.0.10-dfsg-75.0.12-dfsg-15.0.12-dfsg-25.0.14-dfsg-15.0.14-dfsg-25.0.14-dfsg-2build15.0.16-dfsg-25.0.16-dfsg-35.0.18-dfsg-15.0.18-dfsg-1ubuntu15.0.18-dfsg-25.0.18-dfsg-2build15.0.18-dfsg-2ubuntu15.0.24-dfsg-0ubuntu1.16.04.15.0.32-dfsg-0ubuntu1.16.04.25.0.36-dfsg-0ubuntu1.16.04.25.0.40-dfsg-0ubuntu1.16.04.15.0.40-dfsg-0ubuntu1.16.04.25.1.34-dfsg-0ubuntu1.16.04.25.1.38-dfsg-0ubuntu1.16.04.15.1.38-dfsg-0ubuntu1.16.04.25.1.38-dfsg-0ubuntu1.16.04.3
 None known
virtualbox
Ubuntu:18.04:LTS
 All versions, plus listed versions
5.1.30-dfsg-15.2.0-dfsg-1build25.2.0-dfsg-25.2.0-dfsg-45.2.0-dfsg-5
Show 26 moreShow less
5.2.2-dfsg-25.2.2-dfsg-3~build15.2.2-dfsg-35.2.4-dfsg-15.2.4-dfsg-25.2.6-dfsg-15.2.6-dfsg-25.2.6-dfsg-35.2.6-dfsg-3build15.2.6-dfsg-55.2.8-dfsg-25.2.8-dfsg-35.2.8-dfsg-55.2.8-dfsg-65.2.8-dfsg-75.2.10-dfsg-15.2.10-dfsg-25.2.10-dfsg-55.2.10-dfsg-65.2.10-dfsg-6ubuntu18.04.15.2.18-dfsg-2~ubuntu18.04.15.2.18-dfsg-2~ubuntu18.04.35.2.18-dfsg-2~ubuntu18.04.55.2.32-dfsg-0~ubuntu18.04.15.2.34-dfsg-0~ubuntu18.04.15.2.42-dfsg-0~ubuntu1.18.04.1
 None known
virtualbox
Ubuntu:20.04:LTS
 All versions, plus listed versions
6.0.14-dfsg-16.0.14-dfsg-2~build16.0.14-dfsg-26.1.0-dfsg-3build16.1.0-dfsg-3build2
Show 18 moreShow less
6.1.2-dfsg-16.1.2-dfsg-1build16.1.4-dfsg-16.1.4-dfsg-2~build16.1.4-dfsg-26.1.4-dfsg-46.1.6-dfsg-16.1.10-dfsg-1~ubuntu1.20.04.16.1.16-dfsg-6~ubuntu1.20.04.16.1.16-dfsg-6~ubuntu1.20.04.26.1.22-dfsg-2~ubuntu1.20.04.16.1.26-dfsg-3~ubuntu1.20.04.16.1.26-dfsg-3~ubuntu1.20.04.26.1.32-dfsg-1~ubuntu1.20.04.16.1.34-dfsg-3~ubuntu1.20.04.16.1.38-dfsg-3~ubuntu1.20.04.16.1.48-dfsg-1~ubuntu1.20.04.16.1.50-dfsg-1~ubuntu1.20.04.1
 None known
virtualbox
Ubuntu:22.04:LTS
 All versions, plus listed versions
6.1.26-dfsg-46.1.28-dfsg-16.1.30-dfsg-16.1.32-dfsg-16.1.32-dfsg-1build1
Show 5 moreShow less
6.1.34-dfsg-3~ubuntu1.22.04.16.1.38-dfsg-3~ubuntu1.22.04.16.1.48-dfsg-1~ubuntu1.22.04.16.1.50-dfsg-1~ubuntu1.22.04.16.1.50-dfsg-1~ubuntu1.22.04.3
 None known
virtualbox
openSUSE:Leap 15.3
From an advisory covering 5 CVEs
 before 6.1.28-lp153.2.12.1
6.1.28-lp153.2.12.1
virtualbox-kmp
openSUSE:Leap 15.3
From an advisory covering 5 CVEs
 before 6.1.28-lp153.2.12.1
6.1.28-lp153.2.12.1
virtualbox
openSUSE:Leap 15.2
From an advisory covering 5 CVEs
 before 6.1.28-lp152.2.38.1
6.1.28-lp152.2.38.1
virtualbox-kmp
openSUSE:Leap 15.2
From an advisory covering 5 CVEs
 before 6.1.28-lp152.2.38.1
6.1.28-lp152.2.38.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-2475 is a medium vulnerability (CVSS 4.4) in Oracle Vm Virtualbox, published October 20, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.40%, the 34th percentile. No source names a fixed version.

References

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