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Ubuntu 22.04 LTS USN-6085-1 Critical: Kernel Denial of Service Description

ubuntu
Calendar Grey May 17, 2023
Dist Ubuntu Esm H88
This announcement outlines a range of resolved vulnerabilities in the Linux kernel for Raspberry Pi devices within Ubuntu that may impact performance.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-raspi: Linux kernel for Raspberry Pi systems

Details:

It was discovered that some AMD x86-64 processors with SMT enabled could

speculatively execute instructions using a return address from a sibling

thread. A local attacker could possibly use this to expose sensitive

information. (CVE-2022-27672)

Zheng Wang discovered that the Intel i915 graphics driver in the Linux

kernel did not properly handle certain error conditions, leading to a

double-free. A local attacker could possibly use this to cause a denial of

service (system crash). (CVE-2022-3707)

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)

It was discovered that the TLS subsystem in the Linux ke...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel critical severity ubuntu

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1029-raspi   5.15.0-1029.31
   linux-image-5.15.0-1029-raspi-nolpae  5.15.0-1029.31
   linux-image-raspi               5.15.0.1029.26
   linux-image-raspi-nolpae        5.15.0.1029.26

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-6085-1

CVE-2022-27672, CVE-2022-3707, CVE-2023-0459, CVE-2023-1075,

CVE-2023-1078, CVE-2023-1118, CVE-2023-1513, CVE-2023-20938,

CVE-2023-2162, CVE-2023-32269

Severity
critical
Lowest
Low
Medium
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Critical

May 17, 2023

Topics%20covered

Topics Covered

security advisory denial of service kernel critical severity ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1029.31

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