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ubuntuUbuntuUSN-4318-1
HistoryApr 06, 2020 - 12:00 a.m.

Linux kernel vulnerabilities

2020-04-0600:00:00
ubuntu.com
102

6.6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

22.4%

Releases

  • Ubuntu 18.04 ESM
  • Ubuntu 16.04 ESM

Packages

  • linux - Linux kernel
  • linux-hwe - Linux hardware enablement (HWE) kernel

Details

Al Viro discovered that the vfs layer in the Linux kernel contained a use-
after-free vulnerability. A local attacker could use this to cause a denial
of service (system crash) or possibly expose sensitive information (kernel
memory). (CVE-2020-8428)

Gustavo Romero and Paul Mackerras discovered that the KVM implementation in
the Linux kernel for PowerPC processors did not properly keep guest state
separate from host state. A local attacker in a KVM guest could use this to
cause a denial of service (host system crash). (CVE-2020-8834)

Shijie Luo discovered that the ext4 file system implementation in the Linux
kernel did not properly check for a too-large journal size. An attacker
could use this to construct a malicious ext4 image that, when mounted,
could cause a denial of service (soft lockup). (CVE-2020-8992)