CVE-2021-35540

[CVE catalog]

Severity

Medium · CVSS 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Published

Oct 20, 2021, 11:16:00 AM UTC

Updated

Feb 4, 2026, 4:24:51 AM UTC

Source

[NVD] · [CVE record]

EPSS

0.39% · Oct 25, 2026

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).