USN-5557-1: Linux kernel vulnerabilities
9 August 2022
Several security issues were fixed in the Linux kernel.
Releases
Packages
- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-kvm - Linux kernel for cloud environments
- linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
Details
Zhenpeng Lin discovered that the network packet scheduler implementation in
the Linux kernel did not properly remove all references to a route filter
before freeing it in some situations. A local attacker could use this to
cause a denial of service (system crash) or execute arbitrary code.
(CVE-2022-2588)
It was discovered that the netfilter subsystem of the Linux kernel did not
prevent one nft object from referencing an nft set in another nft table,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or execute arbitrary code.
(CVE-2022-2586)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04
-
linux-image-virtual
-
4.4.0.231.237
Available with Ubuntu Pro
-
linux-image-generic
-
4.4.0.231.237
Available with Ubuntu Pro
-
linux-image-aws
-
4.4.0.1147.151
Available with Ubuntu Pro
-
linux-image-4.4.0-1112-kvm
-
4.4.0-1112.122
Available with Ubuntu Pro
-
linux-image-4.4.0-231-lowlatency
-
4.4.0-231.265
Available with Ubuntu Pro
-
linux-image-4.4.0-1147-aws
-
4.4.0-1147.162
Available with Ubuntu Pro
-
linux-image-4.4.0-231-generic
-
4.4.0-231.265
Available with Ubuntu Pro
-
linux-image-kvm
-
4.4.0.1112.109
Available with Ubuntu Pro
-
linux-image-lowlatency
-
4.4.0.231.237
Available with Ubuntu Pro
Ubuntu 14.04
-
linux-image-4.4.0-231-lowlatency
-
4.4.0-231.265~14.04.1
Available with Ubuntu Pro
-
linux-image-generic-lts-xenial
-
4.4.0.231.201
Available with Ubuntu Pro
-
linux-image-4.4.0-231-generic
-
4.4.0-231.265~14.04.1
Available with Ubuntu Pro
-
linux-image-4.4.0-1111-aws
-
4.4.0-1111.117
Available with Ubuntu Pro
-
linux-image-lowlatency-lts-xenial
-
4.4.0.231.201
Available with Ubuntu Pro
-
linux-image-aws
-
4.4.0.1111.108
Available with Ubuntu Pro
-
linux-image-virtual-lts-xenial
-
4.4.0.231.201
Available with Ubuntu Pro
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.