CWE
416
Advisory Published

USN-6342-2: Linux kernel (Azure)

First published: Fri Sep 08 2023(Updated: )

Tavis Ormandy discovered that some AMD processors did not properly handle speculative execution of certain vector register instructions. A local attacker could use this to expose sensitive information. (CVE-2023-20593) Zheng Zhang discovered that the device-mapper implementation in the Linux kernel did not properly handle locking during table_clear() operations. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2023-2269) It was discovered that a use-after-free vulnerability existed in the HFS+ file system implementation in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2023-2985) It was discovered that the DVB Core driver in the Linux kernel did not properly handle locking events in certain situations. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2023-31084) It was discovered that the Quick Fair Queueing network scheduler implementation in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-3611) It was discovered that the network packet classifier with netfilter/firewall marks implementation in the Linux kernel did not properly handle reference counting, 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-2023-3776)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-4.15.0-1169-azure<4.15.0-1169.184
4.15.0-1169.184
=18.04
All of
ubuntu/linux-image-azure-lts-18.04<4.15.0.1169.137
4.15.0.1169.137
=18.04
All of
ubuntu/linux-image-4.15.0-1169-azure<4.15.0-1169.184~16.04.1
4.15.0-1169.184~16.04.1
=16.04
All of
ubuntu/linux-image-azure<4.15.0.1169.153
4.15.0.1169.153
=16.04
All of
ubuntu/linux-image-4.15.0-1169-azure<4.15.0-1169.184~14.04.1
4.15.0-1169.184~14.04.1
=14.04
All of
ubuntu/linux-image-azure<4.15.0.1169.135
4.15.0.1169.135
=14.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-6342-2?

    The severity of USN-6342-2 is high.

  • How can a local attacker exploit the vulnerability in USN-6342-2?

    A local attacker can exploit the vulnerability in USN-6342-2 to expose sensitive information.

  • Which AMD processors are affected by the vulnerability in USN-6342-2?

    Some AMD processors are affected by the vulnerability in USN-6342-2.

  • What is the recommended remedy for the vulnerability in USN-6342-2 on Ubuntu 18.04?

    The recommended remedy for the vulnerability in USN-6342-2 on Ubuntu 18.04 is to update to linux-image-4.15.0-1169-azure version 4.15.0-1169.184.

  • Where can I find more information about the vulnerability in USN-6342-2?

    You can find more information about the vulnerability in USN-6342-2 on the Ubuntu Security Notices website.

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