Ubuntu 22.10, 22.04, 20.04 LTS: 5814-1 High: Kernel Issues

ubuntu

January 19, 2023

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-lowlatency: Linux low latency kernel

- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems

- linux-intel-iotg: Linux kernel for Intel IoT platforms

- linux-lowlatency-hwe-5.15: Linux low latency kernel

- linux-oracle-5.15: Linux kernel for Oracle Cloud systems

Details:

Kyle Zeng discovered that the sysctl implementation in the Linux kernel

contained a stack-based buffer overflow. A local attacker could use this to

cause a denial of service (system crash) or execute arbitrary code.

(CVE-2022-4378)

Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation

in the Linux kernel contained multiple use-after-free vulnerabilities. A

physically proximate attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code. (CVE-2022-42896)

It was disco...

Read the Full Advisory

Topics Covered

security advisory denial of service high severity buffer overflow Ubuntu Linux kernel

Update Instructions

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

Ubuntu 22.10:
   linux-image-5.19.0-1015-lowlatency  5.19.0-1015.16
   linux-image-5.19.0-1015-lowlatency-64k  5.19.0-1015.16
   linux-image-5.19.0-1017-azure   5.19.0-1017.18
   linux-image-azure               5.19.0.1017.13
   linux-image-lowlatency          5.19.0.1015.12
   linux-image-lowlatency-64k      5.19.0.1015.12

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1013-gkeop   5.15.0-1013.17
   linux-image-5.15.0-1023-intel-iotg  5.15.0-1023.28
   linux-image-5.15.0-58-lowlatency  5.15.0-58.64
   linux-image-5.15.0-58-lowlatency-64k  5.15.0-58.64
   linux-image-gkeop               5.15.0.1013.12
   linux-image-gkeop-5.15          5.15.0.1013.12
   linux-image-intel-iotg          5.15.0.1023.22
   linux-image-lowlatency          5.15.0.58.51
   linux-image-lowlatency-64k      5.15.0.58.51
   linux-image-lowlatency-64k-hwe-22.04  5.15.0.58.51
   linux-image-lowlatency-hwe-22.04  5.15.0.58.51

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1027-oracle  5.15.0-1027.33~20.04.1
   linux-image-5.15.0-58-lowlatency  5.15.0-58.64~20.04.1
   linux-image-5.15.0-58-lowlatency-64k  5.15.0-58.64~20.04.1
   linux-image-lowlatency-64k-hwe-20.04  5.15.0.58.64~20.04.21
   linux-image-lowlatency-hwe-20.04  5.15.0.58.64~20.04.21
   linux-image-oracle              5.15.0.1027.33~20.04.1

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.