This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation. (CVE-2021-3612) - An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest.

The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. This flaw allows a local user to crash the system or possibly escalate their privileges on the system. (CVE-2020-36311) - An out-of-bounds memory write flaw was found in the Linux kernel's joystick devices subsystem in versions before 5.9-rc1, in the way the user calls ioctl JSIOCSBTNMAP. arch/x86/kvm/svm/sev.c allows attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering many encrypted regions), aka CID-7be74942f184. (CVE-2020-26541) - An issue was discovered in the Linux kernel before 5.9. This affects certs/blacklist.c and certs/system_keyring.c. (CVE-2019-19449) - The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. In the Linux kernel 5.0.21, mounting a crafted f2fs filesystem image can lead to slab-out-of-bounds read access in f2fs_build_segment_manager in fs/f2fs/segment.c, related to init_min_max_mtime in fs/f2fs/segment.c (because the second argument to get_seg_entry is not validated). Description The remote Ubuntu 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5120-1 advisory.

Synopsis The remote Ubuntu host is missing one or more security updates. Severity display preferences can be toggled in the settings dropdown. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. The calculated severity for Plugins has been updated to use CVSS v3 by default.

Ubuntu 14.04 lts kernel