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Ubuntu 14.04 & 16.04 LTS: USN-6149-1 Critical Kernel Issues

ubuntu
Calendar Grey June 8, 2023
Dist Ubuntu Esm H88
Address multiple critical security flaws within the Linux kernel that affect Ubuntu versions 14.04 and 16.04 LTS distributions.
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:

Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in

the netfilter subsystem of the Linux kernel when processing batch requests,

leading to a use-after-free vulnerability. A local attacker could use this

to cause a denial of service (system crash) or possibly execute arbitrary

code. (CVE-2023-32233)

Gwangun Jung discovered that the Quick Fair Queueing scheduler

implementation in the Linux kernel contained an out-of-bounds write

vulnerability. A local attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code. (CVE-2023-31436)

Reima Ishii discovered that the nested KVM implementation for Intel x86

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update critical ubuntu linux kernel

Update Instructions

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

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   linux-image-4.4.0-1120-kvm      4.4.0-1120.130
   linux-image-4.4.0-1157-aws      4.4.0-1157.172
   linux-image-4.4.0-241-generic   4.4.0-241.275
   linux-image-4.4.0-241-lowlatency  4.4.0-241.275
   linux-image-aws                 4.4.0.1157.161
   linux-image-generic             4.4.0.241.247
   linux-image-generic-lts-xenial  4.4.0.241.247
   linux-image-kvm                 4.4.0.1120.117
   linux-image-lowlatency          4.4.0.241.247
   linux-image-lowlatency-lts-xenial  4.4.0.241.247
   linux-image-virtual             4.4.0.241.247
   linux-image-virtual-lts-xenial  4.4.0.241.247

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   linux-image-4.4.0-1119-aws      4.4.0-1119.125
   linux-image-4.4.0-241-generic   4.4.0-241.275~14.04.1
   linux-image-4.4.0-241-lowlatency  4.4.0-241.275~14.04.1
   linux-image-aws                 4.4.0.1119.116
   linux-image-generic-lts-xenial  4.4.0.241.209
   linux-image-lowlatency-lts-xenial  4.4.0.241.209
   linux-image-virtual-lts-xenial  4.4.0.241.209

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-6149-1

CVE-2023-1073, CVE-2023-1380, CVE-2023-28328, CVE-2023-30456,

CVE-2023-31436, CVE-2023-32233

Severity
critical
Lowest
Low
Medium
High
Critical

June 08, 2023

Topics%20covered

Topics Covered

security advisory denial of service kernel update critical ubuntu linux kernel

Package Information

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