CVSS Base Vector:
The remote host is missing an update for the 'linux'
Linux Distribution Package(s) announced via the DSA-4667-1 advisory.
Checks if a vulnerable Linux Distribution Package version is present on the target host.
Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation, denial of service, or information
Paulo Bonzini discovered that the KVM implementation for Intel
processors did not properly handle instruction emulation for L2
guests when nested virtualization is enabled. This could allow
an L2 guest to cause privilege escalation, denial of service,
or information leaks in the L1 guest.
Al Viro discovered a use-after-free vulnerability in the VFS
layer. This allowed local users to cause a denial-of-service
(crash) or obtain sensitive information from kernel memory.
It was discovered that the vhost_net driver did not properly
validate the type of sockets set as back-ends. A local user
permitted to access /dev/vhost-net could use this to cause a stack
corruption via crafted system calls, resulting in denial of
service (crash) or possibly privilege escalation.
Entropy Moe reported that the shared memory filesystem (tmpfs) did
not correctly handle an mpol
mount option specifying an empty
node list, leading to a stack-based out-of-bounds write. If user
namespaces are enabled, a local user could use this to cause a
denial of service (crash) or possibly for privilege escalation.
Al Viro reported a race condition in memory management code for
IBM Z (s390x architecture), that can result in the kernel
executing code from the user address space. A local user could
use this for privilege escalation.
'linux' Linux Distribution Package(s) on Debian Linux.
For the stable distribution (buster), these problems have been fixed in
We recommend that you upgrade your linux Linux Distribution Packages.
NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)
Linux Distribution Package