CWE
416 362
Advisory Published

USN-6081-1: Linux kernel vulnerabilities

First published: Tue May 16 2023(Updated: )

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) 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 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)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-4.15.0-1156-aws<4.15.0-1156.169
4.15.0-1156.169
=18.04
All of
ubuntu/linux-image-virtual<4.15.0.211.194
4.15.0.211.194
=18.04
All of
ubuntu/linux-image-aws-lts-18.04<4.15.0.1156.154
4.15.0.1156.154
=18.04
All of
ubuntu/linux-image-generic<4.15.0.211.194
4.15.0.211.194
=18.04
All of
ubuntu/linux-image-4.15.0-211-lowlatency<4.15.0-211.222
4.15.0-211.222
=18.04
All of
ubuntu/linux-image-4.15.0-211-generic<4.15.0-211.222
4.15.0-211.222
=18.04
All of
ubuntu/linux-image-4.15.0-211-generic-lpae<4.15.0-211.222
4.15.0-211.222
=18.04
All of
ubuntu/linux-image-kvm<4.15.0.1140.131
4.15.0.1140.131
=18.04
All of
ubuntu/linux-image-generic-lpae<4.15.0.211.194
4.15.0.211.194
=18.04
All of
ubuntu/linux-image-4.15.0-1140-kvm<4.15.0-1140.145
4.15.0-1140.145
=18.04
All of
ubuntu/linux-image-lowlatency<4.15.0.211.194
4.15.0.211.194
=18.04
All of
ubuntu/linux-image-4.15.0-1156-aws<4.15.0-1156.169~16.04.1
4.15.0-1156.169~16.04.1
=16.04
All of
ubuntu/linux-image-aws-hwe<4.15.0.1156.139
4.15.0.1156.139
=16.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2023-0459?

    The severity of CVE-2023-0459 is high.

  • How can a local attacker exploit CVE-2023-0459?

    A local attacker can exploit CVE-2023-0459 by using it to expose sensitive information (kernel memory).

  • What versions of Ubuntu are affected by CVE-2023-0459?

    CVE-2023-0459 affects Ubuntu 18.04 and 16.04.

  • How can I fix CVE-2023-0459 on Ubuntu 18.04?

    To fix CVE-2023-0459 on Ubuntu 18.04, update to version 4.15.0-1156.169 or later of the linux-image-4.15.0-1156-aws package.

  • How can I fix CVE-2023-0459 on Ubuntu 16.04?

    To fix CVE-2023-0459 on Ubuntu 16.04, update to version 4.15.0-1156.169~16.04.1 or later of the linux-image-4.15.0-1156-aws package.

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