CWE
416 362
Advisory Published

USN-6349-1: Linux kernel (Azure) vulnerabilities

First published: Wed Sep 06 2023(Updated: )

Ruihan Li discovered that the bluetooth subsystem in the Linux kernel did not properly perform permissions checks when handling HCI sockets. A physically proximate attacker could use this to cause a denial of service (bluetooth communication). (CVE-2023-2002) Zi Fan Tan discovered that the binder IPC implementation in the Linux kernel contained 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-2023-21255) Juan Jose Lopez Jaimez, Meador Inge, Simon Scannell, and Nenad Stojanovski discovered that the BPF verifier in the Linux kernel did not properly mark registers for precision tracking in certain situations, leading to an out- of-bounds access vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-2163) 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 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 kernel->user space relay implementation in the Linux kernel did not properly perform certain buffer calculations, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information (kernel memory). (CVE-2023-3268) It was discovered that the video4linux driver for Philips based TV cards in the Linux kernel contained a race condition during device removal, leading to a use-after-free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-35823) It was discovered that the SDMC DM1105 PCI device driver in the Linux kernel contained a race condition during device removal, leading to a use- after-free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-35824) It was discovered that the Renesas USB controller driver in the Linux kernel contained a race condition during device removal, 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-2023-35828)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-5.4.0-1115-azure<5.4.0-1115.122
5.4.0-1115.122
=20.04
All of
ubuntu/linux-image-azure-lts-20.04<5.4.0.1115.108
5.4.0.1115.108
=20.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is USN-6349-1.

  • What is the severity of USN-6349-1?

    The severity of USN-6349-1 is not specified.

  • How can an attacker exploit CVE-2023-2002?

    An attacker can exploit CVE-2023-2002 by using a physically proximate attacker to cause a denial of service through Bluetooth communication.

  • What software versions are affected by this vulnerability?

    The vulnerability affects Ubuntu Ubuntu 20.04 with linux-image-5.4.0-1115-azure up to version 5.4.0-1115.122, and Ubuntu Ubuntu 20.04 with linux-image-azure-lts-20.04 up to version 5.4.0.1115.108.

  • How do I fix USN-6349-1?

    To fix USN-6349-1, update to the remedy version: linux-image-5.4.0-1115-azure version 5.4.0-1115.122 or linux-image-azure-lts-20.04 version 5.4.0.1115.108.

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