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Ubuntu 22.04 LTS USN-6235-1 Critical Linux Kernel DoS Issues

ubuntu
Calendar Grey July 18, 2023
Dist Ubuntu Esm H88
Several vulnerabilities addressed in the kernel of Ubuntu 22.04 LTS on July 18, 2023. Recommended to update for improved security.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-6.0: Linux kernel for OEM systems

Details:

It was discovered that the NTFS file system implementation in the Linux

kernel contained a null pointer dereference in some situations. A local

attacker could use this to cause a denial of service (system crash).

(CVE-2022-4842)

Jordy Zomer and Alexandra Sandulescu discovered that the Linux kernel did

not properly implement speculative execution barriers in usercopy functions

in certain situations. A local attacker could use this to expose sensitive

information (kernel memory). (CVE-2023-0459)

Seth Jenkins discovered that the CPU data to memory implementation for x86

processors in the Linux kernel did not properly perform address

randomization. A local attacker could use this to expose sensitive

information (kernel memory) or in conjunction with another kernel

vulnerability. (CVE-2023-0597)

It was discovered that the Huma...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory doS ubuntu linux kernel linux-oem

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-6.0.0-1019-oem      6.0.0-1019.19
   linux-image-oem-22.04b          6.0.0.1019.19

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-6235-1

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2023220

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2023577

CVE-2022-4842, CVE-2023-0459, CVE-2023-0597, CVE-2023-1073,

CVE-2023-2124, CVE-2023-2176, CVE-2023-2430, CVE-2023-35788

Severity
critical
Lowest
Low
Medium
High
Critical

July 18, 2023

Topics%20covered

Topics Covered

security advisory doS ubuntu linux kernel linux-oem

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.0/6.0.0-1019.19

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