Ubuntu 22.10 & 22.04 LTS: 5911-1 Critical Denial Of Service Issues

ubuntu

March 3, 2023

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-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-ibm: Linux kernel for IBM cloud systems

- linux-lowlatency: Linux low latency kernel

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-hwe-5.19: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the Upper Level Protocol (ULP) subsystem in the

Linux kernel did not properly handle sockets entering the LISTEN state in

certain protocols, 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-2023-0461)

Davide Ornaghi discovered that the netfilter subsystem in the Linux kernel

did not properly handle VLAN headers in some situations...

Read the Full Advisory

Topics Covered

security advisory denial of service critical Ubuntu vulnerability kernel issue

Update Instructions

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

Ubuntu 22.10:
   linux-image-5.19.0-1018-gcp     5.19.0-1018.20
   linux-image-5.19.0-1018-ibm     5.19.0-1018.20
   linux-image-5.19.0-1018-lowlatency  5.19.0-1018.19
   linux-image-5.19.0-1018-lowlatency-64k  5.19.0-1018.19
   linux-image-5.19.0-1018-oracle  5.19.0-1018.21
   linux-image-5.19.0-1020-aws     5.19.0-1020.21
   linux-image-5.19.0-1021-azure   5.19.0-1021.22
   linux-image-5.19.0-35-generic   5.19.0-35.36
   linux-image-5.19.0-35-generic-64k  5.19.0-35.36
   linux-image-5.19.0-35-generic-lpae  5.19.0-35.36
   linux-image-aws                 5.19.0.1020.17
   linux-image-azure               5.19.0.1021.17
   linux-image-gcp                 5.19.0.1018.15
   linux-image-generic             5.19.0.35.32
   linux-image-generic-64k         5.19.0.35.32
   linux-image-generic-lpae        5.19.0.35.32
   linux-image-ibm                 5.19.0.1018.15
   linux-image-lowlatency          5.19.0.1018.15
   linux-image-lowlatency-64k      5.19.0.1018.15
   linux-image-oracle              5.19.0.1018.15
   linux-image-virtual             5.19.0.35.32

Ubuntu 22.04 LTS:
   linux-image-5.19.0-35-generic   5.19.0-35.36~22.04.1
   linux-image-5.19.0-35-generic-64k  5.19.0-35.36~22.04.1
   linux-image-5.19.0-35-generic-lpae  5.19.0-35.36~22.04.1
   linux-image-generic-64k-hwe-22.04  5.19.0.35.36~22.04.10
   linux-image-generic-hwe-22.04   5.19.0.35.36~22.04.10
   linux-image-generic-lpae-hwe-22.04  5.19.0.35.36~22.04.10
   linux-image-virtual-hwe-22.04   5.19.0.35.36~22.04.10

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.