CWE
476 362
Advisory Published

USN-6533-1: Linux kernel (OEM) vulnerabilities

First published: Tue Dec 05 2023(Updated: )

Tom Dohrmann discovered that the Secure Encrypted Virtualization (SEV) implementation for AMD processors in the Linux kernel contained a race condition when accessing MMIO registers. A local attacker in a SEV guest VM could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-46813) It was discovered that the io_uring subsystem in the Linux kernel contained a race condition, leading to a null pointer dereference vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-46862)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-6.1.0-1027-oem<6.1.0-1027.27
6.1.0-1027.27
Ubuntu Ubuntu=22.04
All of
ubuntu/linux-image-oem-22.04<6.1.0.1027.28
6.1.0.1027.28
Ubuntu Ubuntu=22.04
All of
ubuntu/linux-image-oem-22.04a<6.1.0.1027.28
6.1.0.1027.28
Ubuntu Ubuntu=22.04
All of
ubuntu/linux-image-oem-22.04c<6.1.0.1027.28
6.1.0.1027.28
Ubuntu Ubuntu=22.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this Linux kernel vulnerability?

    The vulnerability ID for this Linux kernel vulnerability is USN-6533-1.

  • What is the severity of USN-6533-1?

    The severity of USN-6533-1 is not specified.

  • How can a local attacker exploit the Secure Encrypted Virtualization (SEV) vulnerability in this Linux kernel?

    A local attacker in a SEV guest VM can exploit this vulnerability to cause a denial of service (system crash) or possible execution of arbitrary code.

  • What is the affected software for the USN-6533-1 vulnerability?

    The affected software for the USN-6533-1 vulnerability is the Linux kernel, specifically the OEM variant.

  • How can I fix the USN-6533-1 vulnerability?

    To fix the USN-6533-1 vulnerability, update to the Linux kernel version 6.1.0-1027.27 or later.

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