1. Ubuntu Security Notices
  2. USN-6080-1

USN-6080-1: Linux kernel vulnerabilities

Publication date

16 May 2023

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

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...

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 kernel contained a
type confusion vulnerability in some situations. A local attacker could use
this to cause a denial of service (system crash) or possibly expose
sensitive information. (CVE-2023-1075)

It was discovered that the Reliable Datagram Sockets (RDS) protocol
implementation in the Linux kernel contained a type confusion vulnerability
in some situations. An attacker could use this to cause a denial of service
(system crash). (CVE-2023-1078)

Xingyuan Mo discovered that the x86 KVM implementation in the Linux kernel
did not properly initialize some data structures. A local attacker could
use this to expose sensitive information (kernel memory). (CVE-2023-1513)

It was discovered that the Android Binder IPC subsystem in the Linux kernel
did not properly validate inputs in some situations, 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-2023-20938)

It was discovered that a use-after-free vulnerability existed in the iSCSI
TCP implementation in the Linux kernel. A local attacker could possibly use
this to cause a denial of service (system crash). (CVE-2023-2162)

It was discovered that the NET/ROM protocol implementation in the Linux
kernel contained a race condition in some situations, 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-2023-32269)

Duoming Zhou discovered that a race condition existed in the infrared
receiver/transceiver driver in the Linux kernel, leading to a use-after-
free vulnerability. A privileged attacker could use this to cause a denial
of service (system crash) or possibly execute arbitrary code.
(CVE-2023-1118)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
22.04 jammy linux-image-virtual –  5.15.0.72.70
linux-image-5.15.0-72-lowlatency-64k –  5.15.0-72.79
linux-image-generic-64k –  5.15.0.72.70
linux-image-generic –  5.15.0.72.70
linux-image-ibm –  5.15.0.1030.26
linux-image-5.15.0-72-generic-64k –  5.15.0-72.79
linux-image-lowlatency-64k –  5.15.0.72.77
linux-image-5.15.0-72-generic-lpae –  5.15.0-72.79
linux-image-5.15.0-1030-ibm –  5.15.0-1030.33
linux-image-5.15.0-1035-oracle –  5.15.0-1035.41
linux-image-5.15.0-72-generic –  5.15.0-72.79
linux-image-5.15.0-1038-azure –  5.15.0-1038.45
linux-image-5.15.0-1033-kvm –  5.15.0-1033.38
linux-image-azure-fde –  5.15.0.1038.45.15
linux-image-azure-lts-22.04 –  5.15.0.1038.34
linux-image-azure –  5.15.0.1038.34
linux-image-aws-lts-22.04 –  5.15.0.1036.35
linux-image-5.15.0-1038-azure-fde –  5.15.0-1038.45.1
linux-image-oracle –  5.15.0.1035.30
linux-image-5.15.0-1036-aws –  5.15.0-1036.40
linux-image-kvm –  5.15.0.1033.29
linux-image-5.15.0-72-lowlatency –  5.15.0-72.79
linux-image-generic-lpae –  5.15.0.72.70
linux-image-lowlatency –  5.15.0.72.77
20.04 focal linux-image-oem-20.04b –  5.15.0.72.79~20.04.33
linux-image-virtual-hwe-20.04 –  5.15.0.72.79~20.04.33
linux-image-5.15.0-72-lowlatency-64k –  5.15.0-72.79~20.04.1
linux-image-aws –  5.15.0.1036.40~20.04.25
linux-image-azure-cvm –  5.15.0.1038.45~20.04.28
linux-image-lowlatency-hwe-20.04 –  5.15.0.72.79~20.04.30
linux-image-generic-hwe-20.04 –  5.15.0.72.79~20.04.33
linux-image-5.15.0-72-generic-64k –  5.15.0-72.79~20.04.1
linux-image-5.15.0-72-generic-lpae –  5.15.0-72.79~20.04.1
linux-image-oem-20.04c –  5.15.0.72.79~20.04.33
linux-image-azure-fde –  5.15.0.1038.45~20.04.1.17
linux-image-oem-20.04d –  5.15.0.72.79~20.04.33
linux-image-azure –  5.15.0.1038.45~20.04.28
linux-image-oem-20.04 –  5.15.0.72.79~20.04.33
linux-image-5.15.0-1038-azure-fde –  5.15.0-1038.45~20.04.1.1
linux-image-lowlatency-64k-hwe-20.04 –  5.15.0.72.79~20.04.30
linux-image-5.15.0-1038-azure –  5.15.0-1038.45~20.04.1
linux-image-generic-64k-hwe-20.04 –  5.15.0.72.79~20.04.33
linux-image-generic-lpae-hwe-20.04 –  5.15.0.72.79~20.04.33
linux-image-5.15.0-1036-aws –  5.15.0-1036.40~20.04.1
linux-image-5.15.0-72-generic –  5.15.0-72.79~20.04.1
linux-image-5.15.0-72-lowlatency –  5.15.0-72.79~20.04.1

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References

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