CWE
416 476
Advisory Published

USN-6573-1: Linux kernel (Azure) vulnerabilities

First published: Tue Jan 09 2024(Updated: )

Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate some attributes passed from userspace. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2023-39189) Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did not properly handle socket buffers (skb) when performing IP routing in certain circumstances, leading to a null pointer dereference vulnerability. A privileged attacker could use this to cause a denial of service (system crash). (CVE-2023-42754) Yikebaer Aizezi discovered that the ext4 file system implementation in the Linux kernel contained a use-after-free vulnerability when handling inode extent metadata. An attacker could use this to construct a malicious ext4 file system image that, when mounted, could cause a denial of service (system crash). (CVE-2023-45898) Jason Wang discovered that the virtio ring implementation in the Linux kernel did not properly handle iov buffers in some situations. A local attacker in a guest VM could use this to cause a denial of service (host system crash). (CVE-2023-5158) Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel did not properly handle queue initialization failures in certain situations, leading to a use-after-free vulnerability. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-5178) Budimir Markovic discovered that the perf subsystem in the Linux kernel did not properly handle event groups, leading to 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-2023-5717)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-6.5.0-1010-azure<6.5.0-1010.10
6.5.0-1010.10
Ubuntu=23.10
All of
ubuntu/linux-image-6.5.0-1010-azure-fde<6.5.0-1010.10
6.5.0-1010.10
Ubuntu=23.10
All of
ubuntu/linux-image-azure<6.5.0.1010.12
6.5.0.1010.12
Ubuntu=23.10
All of
ubuntu/linux-image-azure-fde<6.5.0.1010.12
6.5.0.1010.12
Ubuntu=23.10

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-6573-1?

    The severity of USN-6573-1 is considered high due to the potential for denial of service and exposure of sensitive information.

  • How do I fix USN-6573-1?

    To fix USN-6573-1, upgrade to the recommended kernel version 6.5.0-1010.10 or later.

  • What systems are affected by USN-6573-1?

    USN-6573-1 affects Ubuntu version 23.10 systems using various kernel image packages, specifically linux-image-6.5.0-1010-azure and linux-image-azure.

  • Can a remote attacker exploit USN-6573-1?

    No, USN-6573-1 is a local attack vector that requires access to the system by an authenticated user.

  • What is the potential impact of USN-6573-1?

    The potential impact of USN-6573-1 includes system crashes and possible exposure of kernel memory, leading to sensitive data being accessible.

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