{"id":"CVE-2021-35540","aliases":["EUVD-2021-22176","GHSA-mr7h-v8cg-2gc3","MGASA-2021-0488","UBUNTU-CVE-2021-35540","openSUSE-SU-2021:1393-1","openSUSE-SU-2021:1403-1"],"status":"published","title":"Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The...","description":"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 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. CVSS 3.1 Base Score 5.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00391,"percentile":0.33541,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-10-20T10:49:53Z","modified":"2026-06-17T03:57:40Z","affected":[{"source":"osv","ecosystem":"Mageia:8","package":"virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.28-1.mga8"}]}],"bundled":5},{"source":"osv","ecosystem":"Mageia:8","package":"kmod-virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.28-1.mga8"}]}],"bundled":5},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.4-dfsg-2","5.0.8-dfsg-1","5.0.10-dfsg-1","5.0.10-dfsg-2","5.0.10-dfsg-3","5.0.10-dfsg-4","5.0.10-dfsg-5","5.0.10-dfsg-6","5.0.10-dfsg-7","5.0.12-dfsg-1","5.0.12-dfsg-2","5.0.14-dfsg-1","5.0.14-dfsg-2","5.0.14-dfsg-2build1","5.0.16-dfsg-2","5.0.16-dfsg-3","5.0.18-dfsg-1","5.0.18-dfsg-1ubuntu1","5.0.18-dfsg-2","5.0.18-dfsg-2build1","5.0.18-dfsg-2ubuntu1","5.0.24-dfsg-0ubuntu1.16.04.1","5.0.32-dfsg-0ubuntu1.16.04.2","5.0.36-dfsg-0ubuntu1.16.04.2","5.0.40-dfsg-0ubuntu1.16.04.1","5.0.40-dfsg-0ubuntu1.16.04.2","5.1.34-dfsg-0ubuntu1.16.04.2","5.1.38-dfsg-0ubuntu1.16.04.1","5.1.38-dfsg-0ubuntu1.16.04.2","5.1.38-dfsg-0ubuntu1.16.04.3"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.1.30-dfsg-1","5.2.0-dfsg-1build2","5.2.0-dfsg-2","5.2.0-dfsg-4","5.2.0-dfsg-5","5.2.2-dfsg-2","5.2.2-dfsg-3~build1","5.2.2-dfsg-3","5.2.4-dfsg-1","5.2.4-dfsg-2","5.2.6-dfsg-1","5.2.6-dfsg-2","5.2.6-dfsg-3","5.2.6-dfsg-3build1","5.2.6-dfsg-5","5.2.8-dfsg-2","5.2.8-dfsg-3","5.2.8-dfsg-5","5.2.8-dfsg-6","5.2.8-dfsg-7","5.2.10-dfsg-1","5.2.10-dfsg-2","5.2.10-dfsg-5","5.2.10-dfsg-6","5.2.10-dfsg-6ubuntu18.04.1","5.2.18-dfsg-2~ubuntu18.04.1","5.2.18-dfsg-2~ubuntu18.04.3","5.2.18-dfsg-2~ubuntu18.04.5","5.2.32-dfsg-0~ubuntu18.04.1","5.2.34-dfsg-0~ubuntu18.04.1","5.2.42-dfsg-0~ubuntu1.18.04.1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.14-dfsg-1","6.0.14-dfsg-2~build1","6.0.14-dfsg-2","6.1.0-dfsg-3build1","6.1.0-dfsg-3build2","6.1.2-dfsg-1","6.1.2-dfsg-1build1","6.1.4-dfsg-1","6.1.4-dfsg-2~build1","6.1.4-dfsg-2","6.1.4-dfsg-4","6.1.6-dfsg-1","6.1.10-dfsg-1~ubuntu1.20.04.1","6.1.16-dfsg-6~ubuntu1.20.04.1","6.1.16-dfsg-6~ubuntu1.20.04.2","6.1.22-dfsg-2~ubuntu1.20.04.1","6.1.26-dfsg-3~ubuntu1.20.04.1","6.1.26-dfsg-3~ubuntu1.20.04.2","6.1.32-dfsg-1~ubuntu1.20.04.1","6.1.34-dfsg-3~ubuntu1.20.04.1","6.1.38-dfsg-3~ubuntu1.20.04.1","6.1.48-dfsg-1~ubuntu1.20.04.1","6.1.50-dfsg-1~ubuntu1.20.04.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.1.26-dfsg-4","6.1.28-dfsg-1","6.1.30-dfsg-1","6.1.32-dfsg-1","6.1.32-dfsg-1build1","6.1.34-dfsg-3~ubuntu1.22.04.1","6.1.38-dfsg-3~ubuntu1.22.04.1","6.1.48-dfsg-1~ubuntu1.22.04.1","6.1.50-dfsg-1~ubuntu1.22.04.1","6.1.50-dfsg-1~ubuntu1.22.04.3"]},{"source":"osv","ecosystem":"openSUSE:Leap 15.3","package":"virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.28-lp153.2.12.1"}]}],"bundled":5},{"source":"osv","ecosystem":"openSUSE:Leap 15.3","package":"virtualbox-kmp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.28-lp153.2.12.1"}]}],"bundled":5},{"source":"osv","ecosystem":"openSUSE:Leap 15.2","package":"virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.28-lp152.2.38.1"}]}],"bundled":5},{"source":"osv","ecosystem":"openSUSE:Leap 15.2","package":"virtualbox-kmp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.28-lp152.2.38.1"}]}],"bundled":5}],"products":[{"vendor":"oracle","product":"vm_virtualbox"},{"vendor":"oracle corporation","product":"vm virtualbox"}],"references":[{"url":"https://www.oracle.com/security-alerts/cpuoct2021.html","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","report"]},{"url":"https://security.gentoo.org/glsa/202208-36","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-35540"},{"url":"https://github.com/advisories/GHSA-mr7h-v8cg-2gc3"},{"url":"https://advisories.mageia.org/MGASA-2021-0488.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=29566","tags":["report"]},{"url":"https://www.virtualbox.org/wiki/Changelog-6.1#v28","tags":["web"]},{"url":"https://www.oracle.com/security-alerts/cpuoct2021.html#AppendixOVIR","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2021-35540","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-35540","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/5TGGPXPQHCHAYI4TLQLUQ74AESTO2Y6W/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1191104","tags":["report"]},{"url":"https://bugzilla.suse.com/1191526","tags":["report"]},{"url":"https://bugzilla.suse.com/1191869","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2021-2475","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-35538","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-35540","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-35542","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-35545","tags":["web"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/YVTOCSVAK2EXN2GDT2LDLTD72RKC2CAY/","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-35540","description":"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 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. CVSS 3.1 Base Score 5.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).","status":"published","published":"2021-10-20T10:49:53Z","modified":"2024-09-25T19:37:53.451Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:09.864034Z"}],"euvd":[{"id":"EUVD-2021-22176","description":"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 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. CVSS 3.1 Base Score 5.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).","status":"published","published":"2021-10-20T10:49:53Z","modified":"2024-09-25T19:37:53Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T00:28:11.362612Z"}],"ghsa":[{"id":"GHSA-mr7h-v8cg-2gc3","title":"Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The...","description":"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 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. CVSS 3.1 Base Score 5.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).","status":"published","published":"2022-05-24T19:18:18Z","modified":"2023-01-30T05:01:40Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T14:46:27.869667Z"}],"nvd":[{"id":"CVE-2021-35540","description":"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 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. CVSS 3.1 Base Score 5.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).","status":"published","published":"2021-10-20T11:16:30.06Z","modified":"2026-06-17T03:57:40.307Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"2.0","score":4.9,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:00.137719Z"}],"osv":[{"id":"UBUNTU-CVE-2021-35540","description":"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 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. CVSS 3.1 Base Score 5.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).","status":"published","published":"2021-10-20T11:16:00Z","modified":"2025-10-24T04:50:25Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:27.870979Z"},{"id":"MGASA-2021-0488","title":"Updated virtualbox packages fix security vulnerabilities","description":"This update provides the upstream 6.1.28 maintenance release that fixes\nat least the following security vulnerabilities:\n\nVulnerability in the Oracle VM VirtualBox prior to 6.1.28 contains an\neasily exploitable vulnerability that allows high privileged attacker with\nlogon to the infrastructure where Oracle VM VirtualBox executes to\ncompromise Oracle VM VirtualBox. Successful attacks of this vulnerability\ncan result in unauthorized ability to cause a hang or frequently repeatable\ncrash (complete DOS) of Oracle VM VirtualBox (CVE-2021-2475, CVE-2021-35542).\n\nVulnerability in the Oracle VM VirtualBox prior to 6.1.28 contains an easily\nexploitable vulnerability that allows low privileged attacker with logon to\nthe infrastructure where Oracle VM VirtualBox executes to compromise Oracle\nVM VirtualBox. Successful attacks of this vulnerability can result in\ntakeover of Oracle VM VirtualBox (CVE-2021-35538).\n\nVulnerability in the Oracle VM VirtualBox prior to 6.1.28 contains an easily\nexploitable vulnerability that allows low privileged attacker with logon to\nthe infrastructure where Oracle VM VirtualBox executes to compromise Oracle\nVM VirtualBox. Successful attacks of this vulnerability can result in\nunauthorized ability to cause a hang or frequently repeatable crash\n(complete DOS) of Oracle VM VirtualBox (CVE-2021-35540).\n\nVulnerability in the Oracle VM VirtualBox prior to 6.1.28 contains an easily\nexploitable vulnerability that allows high privileged attacker with logon to\nthe infrastructure where Oracle VM VirtualBox executes to compromise Oracle\nVM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks\nmay significantly impact additional products. Successful attacks of this\nvulnerability can result in unauthorized ability to cause a hang or\nfrequently repeatable crash (complete DOS) of Oracle VM VirtualBox and\nunauthorized read access to a subset of Oracle VM VirtualBox accessible\ndata (CVE-2021-35545).\n\nFor other upstream fixes in this update, see the referenced changelog.\n","status":"published","published":"2021-10-23T17:48:37Z","modified":"2026-04-16T04:42:47.493381307Z","updated_at":"2026-11-02T15:49:41.849028Z"},{"id":"openSUSE-SU-2021:1393-1","title":"Security update for virtualbox","description":"This update for virtualbox fixes the following issues:\n\nVersion bump to 6.1.28 (released October 19 2021 by Oracle)\n\nThis is a maintenance release. The following items were fixed and/or added:\n\n- VMM: Fixed guru meditation while booting nested-guests accessing debug registers under certain conditions\n- UI: Bug fixes for touchpad-based scrolling\n- VMSVGA: Fixed VM black screen issue on first resize after restoring from saved state (bug #20067)\n- VMSVGA: Fixed display corruption on Linux Mint (bug #20513)\n- Storage: Fixed a possible write error under certain circumstances when using VHD images (bug #20512)\n- Network: Multiple updates in virtio-net device support\n- Network: Disconnecting cable in saved VM state now is handled properly by virtio-net\n- Network: More administrative control over network ranges, see user manual\n- NAT: Fixed not rejecting TFTP requests with absolute pathnames (bug #20589)\n- Audio: Fixed VM session aborting after PC hibernation (bug #20516)\n- Audio: Fixed setting the line-in volume of the HDA emulation on modern Linux guests\n- Audio: Fixed resuming playback of the AC'97 emulation while a snapshot has been taken\n- API: Added bindings support for Python 3.9 (bug #20252)\n- API: Fixed rare hang of VM when changing settings at runtime\n- Linux host: Improved kernel modules installation detection which prevents unnecessary modules rebuild\n- Host Services: Shared Clipboard: Prevent guest clipboard reset when clipboard sharing is disabled (bug #20487)\n- Host Services: Shared Clipboard over VRDP: Fixed to continue working when guest service reconnects to host (bug #20366)\n- Host Services: Shared Clipboard over VRDP: Fixed preventing remote RDP client to hang when guest has no clipboard data to report\n- Linux Host and Guest: Introduced initial support for kernels 5.14 and 5.15\n- Linux Host and Guest: Introduced initial support for RHEL 8.5 kernel\n- Windows Guest: Introduced Windows 11 guest support, including unattended installation\n- Fixes CVE-2021-35538, CVE-2021-35545, CVE-2021-35540, CVE-2021-35542, and CVE-2021-2475 (boo#1191869)\n\n- Use kernel_module_directory macro for kernel modules (boo#1191526)\n- Finish UsrMerge for VirtualBox components (boo#1191104).\n","status":"published","published":"2021-10-26T10:00:51Z","modified":"2026-02-04T04:24:51.570753Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"openSUSE-SU-2021:1403-1","title":"Security update for virtualbox","description":"This update for virtualbox fixes the following issues:\n\nVersion bump to 6.1.28 (released October 19 2021 by Oracle)\n\nThis is a maintenance release. The following items were fixed and/or added:\n\n- VMM: Fixed guru meditation while booting nested-guests accessing debug registers under certain conditions\n- UI: Bug fixes for touchpad-based scrolling\n- VMSVGA: Fixed VM black screen issue on first resize after restoring from saved state (bug #20067)\n- VMSVGA: Fixed display corruption on Linux Mint (bug #20513)\n- Storage: Fixed a possible write error under certain circumstances when using VHD images (bug #20512)\n- Network: Multiple updates in virtio-net device support\n- Network: Disconnecting cable in saved VM state now is handled properly by virtio-net\n- Network: More administrative control over network ranges, see user manual\n- NAT: Fixed not rejecting TFTP requests with absolute pathnames (bug #20589)\n- Audio: Fixed VM session aborting after PC hibernation (bug #20516)\n- Audio: Fixed setting the line-in volume of the HDA emulation on modern Linux guests\n- Audio: Fixed resuming playback of the AC'97 emulation while a snapshot has been taken\n- API: Added bindings support for Python 3.9 (bug #20252)\n- API: Fixed rare hang of VM when changing settings at runtime\n- Linux host: Improved kernel modules installation detection which prevents unnecessary modules rebuild\n- Host Services: Shared Clipboard: Prevent guest clipboard reset when clipboard sharing is disabled (bug #20487)\n- Host Services: Shared Clipboard over VRDP: Fixed to continue working when guest service reconnects to host (bug #20366)\n- Host Services: Shared Clipboard over VRDP: Fixed preventing remote RDP client to hang when guest has no clipboard data to report\n- Linux Host and Guest: Introduced initial support for kernels 5.14 and 5.15\n- Linux Host and Guest: Introduced initial support for RHEL 8.5 kernel\n- Windows Guest: Introduced Windows 11 guest support, including unattended installation\n- Fixes CVE-2021-35538, CVE-2021-35545, CVE-2021-35540, CVE-2021-35542, and CVE-2021-2475 (boo#1191869)\n\n- Use kernel_module_directory macro for kernel modules (boo#1191526)\n- Finish UsrMerge for VirtualBox components (boo#1191104).\n","status":"published","published":"2021-10-31T14:52:48Z","modified":"2026-02-04T02:16:59.676483Z","updated_at":"2026-11-02T16:58:32.266854Z"}]}}