Skip to content
OpenAdvisories
Medium USN-4681-1 6 CVEs

linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities

Published Jan 6, 2021 · Updated Jun 3, 2026

Summary

Ryan Hall discovered that the Intel 700 Series Ethernet Controllers driver
in the Linux kernel did not properly deallocate memory in some conditions.
A local attacker could use this to cause a denial of service (kernel memory
exhaustion). (CVE-2019-0148)

It was discovered that the console keyboard driver in the Linux kernel
contained a race condition. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2020-25656)

Minh Yuan discovered that the tty driver in the Linux kernel contained race
conditions when handling fonts. A local attacker could possibly use this to
expose sensitive information (kernel memory). (CVE-2020-25668)

Jinoh Kang discovered that the Xen event channel infrastructure in the
Linux kernel contained a race condition. An attacker in guest could
possibly use this to cause a denial of service (dom0 crash).
(CVE-2020-27675)

Minh Yuan discovered that the framebuffer console driver in the Linux
kernel did not properly handle fonts in some conditions. A local attacker
could use this to cause a denial of service (system crash) or possibly
expose sensitive information (kernel memory). (CVE-2020-28974)

It was discovered that Power 9 processors could be coerced to expose
information from the L1 cache in certain situations. A local attacker could
use this to expose sensitive information. (CVE-2020-4788)

Fixed packages 7

ReleasePackageFixed in
Ubuntu · 16.04 LTS 16.04:LTS linux 4.4.0-198.230
Ubuntu · 16.04 LTS 16.04:LTS linux-aws 4.4.0-1119.133
Ubuntu · 16.04 LTS 16.04:LTS linux-kvm 4.4.0-1085.94
Ubuntu · 16.04 LTS 16.04:LTS linux-raspi2 4.4.0-1143.153
Ubuntu · 16.04 LTS 16.04:LTS linux-snapdragon 4.4.0-1147.157
Ubuntu · Pro 14.04 LTS Pro:14.04:LTS linux-aws 4.4.0-1083.87
Ubuntu · Pro 14.04 LTS Pro:14.04:LTS linux-lts-xenial 4.4.0-198.230~14.04.1

Vulnerabilities 6

References

  • report
    https://ubuntu.com/security/CVE-2019-0148
  • report
    https://ubuntu.com/security/CVE-2020-4788
  • report
    https://ubuntu.com/security/CVE-2020-25656
  • report
    https://ubuntu.com/security/CVE-2020-25668
  • report
    https://ubuntu.com/security/CVE-2020-27675
  • report
    https://ubuntu.com/security/CVE-2020-28974