linux kernel: CVSS (Max): 7.8

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2023.0151
               USN-5799-1: Linux kernel (OEM) vulnerability
                              11 January 2023

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           linux kernel
Publisher:         Ubuntu
Operating System:  Ubuntu
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-4378  

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-5799-1

Comment: CVSS (Max):  7.8 CVE-2022-4378 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
         CVSS Source: Red Hat
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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USN-5799-1: Linux kernel (OEM) vulnerability

11 January 2023

The system could be made to crash or run programs as an administrator.

Releases

  o Ubuntu 22.04 LTS

Packages

  o linux-oem-5.17 - Linux kernel for OEM systems
  o linux-oem-6.0 - Linux kernel for OEM 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.

Update instructions

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

Ubuntu 22.04

  o linux-image-6.0.0-1010-oem - 6.0.0-1010.10
  o linux-image-oem-22.04 - 5.17.0.1026.24
  o linux-image-oem-22.04a - 5.17.0.1026.24
  o linux-image-oem-22.04b - 6.0.0.1010.10
  o linux-image-5.17.0-1026-oem - 5.17.0-1026.27

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

  o CVE-2022-4378

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