CWE
416
Advisory Published

USN-6396-1: Linux kernel vulnerabilities

First published: Tue Sep 26 2023(Updated: )

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) Daniel Moghimi discovered that some Intel(R) Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information. (CVE-2022-40982) Yang Lan discovered that the GFS2 file system implementation in the Linux kernel could attempt to dereference a null pointer in some situations. An attacker could use this to construct a malicious GFS2 image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2023-3212) It was discovered that the NFC implementation in the Linux kernel contained a use-after-free vulnerability when performing peer-to-peer communication in certain conditions. A privileged attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2023-3863) It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, 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-2023-40283) It was discovered that some network classifier implementations in the Linux kernel contained use-after-free vulnerabilities. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-4128)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-4.15.0-1124-oracle<4.15.0-1124.135
4.15.0-1124.135
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-1155-gcp<4.15.0-1155.172
4.15.0-1155.172
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-1161-aws<4.15.0-1161.174
4.15.0-1161.174
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-1170-azure<4.15.0-1170.185
4.15.0-1170.185
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-218-generic<4.15.0-218.229
4.15.0-218.229
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-218-lowlatency<4.15.0-218.229
4.15.0-218.229
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-aws-lts-18.04<4.15.0.1161.159
4.15.0.1161.159
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-azure-lts-18.04<4.15.0.1170.138
4.15.0.1170.138
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-gcp-lts-18.04<4.15.0.1155.169
4.15.0.1155.169
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-generic<4.15.0.218.202
4.15.0.218.202
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-lowlatency<4.15.0.218.202
4.15.0.218.202
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-oracle-lts-18.04<4.15.0.1124.129
4.15.0.1124.129
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-virtual<4.15.0.218.202
4.15.0.218.202
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-1124-oracle<4.15.0-1124.135~16.04.1
4.15.0-1124.135~16.04.1
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-4.15.0-1155-gcp<4.15.0-1155.172~16.04.1
4.15.0-1155.172~16.04.1
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-4.15.0-1161-aws<4.15.0-1161.174~16.04.1
4.15.0-1161.174~16.04.1
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-4.15.0-1170-azure<4.15.0-1170.185~16.04.1
4.15.0-1170.185~16.04.1
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-4.15.0-218-generic<4.15.0-218.229~16.04.1
4.15.0-218.229~16.04.1
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-4.15.0-218-lowlatency<4.15.0-218.229~16.04.1
4.15.0-218.229~16.04.1
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-aws-hwe<4.15.0.1161.144
4.15.0.1161.144
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-azure<4.15.0.1170.154
4.15.0.1170.154
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-gcp<4.15.0.1155.145
4.15.0.1155.145
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-generic-hwe-16.04<4.15.0.218.2
4.15.0.218.2
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-gke<4.15.0.1155.145
4.15.0.1155.145
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-lowlatency-hwe-16.04<4.15.0.218.2
4.15.0.218.2
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-oem<4.15.0.218.2
4.15.0.218.2
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-oracle<4.15.0.1124.105
4.15.0.1124.105
Ubuntu Ubuntu=16.04
All of
ubuntu/linux-image-virtual-hwe-16.04<4.15.0.218.2
4.15.0.218.2
Ubuntu Ubuntu=16.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is USN-6396-1?

    USN-6396-1 is a security vulnerability in the Linux kernel.

  • What is the severity of USN-6396-1?

    The severity of USN-6396-1 is not specified.

  • How can an attacker exploit CVE-2022-27672?

    An attacker can exploit CVE-2022-27672 by using a return address from a sibling thread to speculatively execute instructions and expose sensitive information.

  • How can I fix USN-6396-1?

    To fix USN-6396-1, update to the specified versions of the Linux kernel packages provided by Ubuntu.

  • Where can I find more information about USN-6396-1?

    You can find more information about USN-6396-1 on the Ubuntu Security Notices website.

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