|Category:||Ubuntu Local Security Checks|
|Title:||Ubuntu: Security Advisory for linux (USN-4367-2)|
|Summary:||The remote host is missing an update for the 'linux'; package(s) announced via the USN-4367-2 advisory.|
The remote host is missing an update for the 'linux'
package(s) announced via the USN-4367-2 advisory.
USN-4367-1 fixed vulnerabilities in the 5.4 Linux kernel. Unfortunately,
that update introduced a regression in overlayfs. This update corrects
We apologize for the inconvenience.
Original advisory details:
It was discovered that the btrfs implementation in the Linux kernel did not
properly detect that a block was marked dirty in some situations. An
attacker could use this to specially craft a file system image that, when
unmounted, could cause a denial of service (system crash). (CVE-2019-19377)
It was discovered that the linux kernel did not properly validate certain
mount options to the tmpfs virtual memory file system. A local attacker
with the ability to specify mount options could use this to cause a denial
of service (system crash). (CVE-2020-11565)
It was discovered that the block layer in the Linux kernel contained a race
condition leading to a use-after-free vulnerability. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2020-12657)
'linux' package(s) on Ubuntu 20.04 LTS.
Please install the updated package(s).
Common Vulnerability Exposure (CVE) ID: CVE-2019-19377|
Common Vulnerability Exposure (CVE) ID: CVE-2020-11565
Common Vulnerability Exposure (CVE) ID: CVE-2020-12657
|Copyright||Copyright (C) 2020 Greenbone Networks GmbH|
|This is only one of 85075 vulnerability tests in our test suite. Find out more about running a complete security audit.|
To run a free test of this vulnerability against your system, register below.