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             AUSCERT External Security Bulletin Redistribution

              USN-6122-1: Linux kernel (OEM) vulnerabilities
                                31 May 2023


        AusCERT Security Bulletin Summary

Product:           Linux kernel (OEM)
Publisher:         Ubuntu
Operating System:  Ubuntu
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-32233 CVE-2023-2612 

Original Bulletin: 

Comment: CVSS (Max):  7.8* CVE-2023-32233 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
         CVSS Source: NVD
         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
         * Not all CVSS available when published

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USN-6122-1: Linux kernel (OEM) vulnerabilities

30 May 2023

Several security issues were fixed in the Linux kernel.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and
Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro


  o Ubuntu 22.04 LTS


  o linux-oem-6.1 - Linux kernel for OEM systems


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 )

Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu
Linux kernel contained a race condition when handling inode locking in some
situations. A local attacker could use this to cause a denial of service
(kernel deadlock). ( CVE-2023-2612 )

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and
Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 22.04

  o linux-image-6.1.0-1013-oem - 6.1.0-1013.13
  o linux-image-oem-22.04c -

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.


  o CVE-2023-32233
  o CVE-2023-2612

Related notices

  o USN-6123-1 : linux-oem-6.0-tools-6.0.0-1017, linux-tools-oem-22.04b,
    linux-image-oem-22.04b, linux-modules-ivsc-oem-22.04b,
    linux-modules-iwlwifi-6.0.0-1017-oem, linux-tools-6.0.0-1017-oem,
    linux-modules-iwlwifi-oem-22.04b, linux-oem-6.0, linux-oem-22.04b,
    linux-image-unsigned-6.0.0-1017-oem, linux-buildinfo-6.0.0-1017-oem,
    linux-headers-6.0.0-1017-oem, linux-modules-ivsc-6.0.0-1017-oem,
    linux-oem-6.0-headers-6.0.0-1017, linux-headers-oem-22.04b,
    linux-modules-6.0.0-1017-oem, linux-modules-ipu6-6.0.0-1017-oem,
    linux-modules-ipu6-oem-22.04b, linux-image-6.0.0-1017-oem,
  o USN-6124-1 : linux-modules-iwlwifi-oem-22.04a, linux-headers-oem-22.04a,
    linux-modules-ipu6-oem-22.04, linux-image-oem-22.04,
    linux-modules-5.17.0-1032-oem, linux-tools-5.17.0-1032-oem,
    linux-image-5.17.0-1032-oem, linux-modules-iwlwifi-oem-22.04,
    linux-oem-22.04, linux-oem-5.17-headers-5.17.0-1032,
    linux-oem-5.17-tools-5.17.0-1032, linux-buildinfo-5.17.0-1032-oem,
    linux-modules-ivsc-oem-22.04, linux-headers-oem-22.04,
    linux-modules-ivsc-oem-22.04a, linux-headers-5.17.0-1032-oem,
    linux-modules-ivsc-5.17.0-1032-oem, linux-tools-oem-22.04a,
    linux-image-unsigned-5.17.0-1032-oem, linux-image-oem-22.04a,
    linux-tools-oem-22.04, linux-modules-ipu6-oem-22.04a,
    linux-oem-5.17-tools-host, linux-oem-22.04a,
    linux-modules-ipu6-5.17.0-1032-oem, linux-modules-iwlwifi-5.17.0-1032-oem,

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