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Ubuntu 16.04 ESM USN-5557-1 Critical Kernel Denial Of Service Threat

ubuntu
Calendar Grey August 9, 2022
Dist Ubuntu Esm H88
Numerous vulnerabilities within the Linux kernel necessitate urgent patches for Ubuntu users to safeguard against possible threats.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- 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)

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel linux network issue

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 ESM:
   linux-image-4.4.0-1112-kvm      4.4.0-1112.122
   linux-image-4.4.0-1147-aws      4.4.0-1147.162
   linux-image-4.4.0-231-generic   4.4.0-231.265
   linux-image-4.4.0-231-lowlatency  4.4.0-231.265
   linux-image-aws                 4.4.0.1147.151
   linux-image-generic             4.4.0.231.237
   linux-image-kvm                 4.4.0.1112.109
   linux-image-lowlatency          4.4.0.231.237
   linux-image-virtual             4.4.0.231.237

Ubuntu 14.04 ESM:
   linux-image-4.4.0-1111-aws      4.4.0-1111.117
   linux-image-4.4.0-231-generic   4.4.0-231.265~14.04.1
   linux-image-4.4.0-231-lowlatency  4.4.0-231.265~14.04.1
   linux-image-aws                 4.4.0.1111.108
   linux-image-generic-lts-xenial  4.4.0.231.201
   linux-image-lowlatency-lts-xenial  4.4.0.231.201
   linux-image-virtual-lts-xenial  4.4.0.231.201

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.

References

https://ubuntu.com/security/notices/USN-5557-1

CVE-2022-2586, CVE-2022-2588

Severity
critical
Lowest
Low
Medium
High
Critical

August 09, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel linux network issue

Package Information

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