CWE
190 416 476 362
Advisory Published

USN-5884-1: Linux kernel (AWS) vulnerabilities

First published: Thu Feb 23 2023(Updated: )

Kirill Tkhai discovered that the XFS file system implementation in the Linux kernel did not calculate size correctly when pre-allocating space in some situations. A local attacker could use this to expose sensitive information. (CVE-2021-4155) Lee Jones discovered that a use-after-free vulnerability existed in the Bluetooth implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-20566) Duoming Zhou discovered that a race condition existed in the SLIP driver in the Linux kernel, leading to a null pointer dereference vulnerability. An attacker could use this to cause a denial of service (system crash). (CVE-2022-41858) Tamás Koczka discovered that the Bluetooth L2CAP implementation in the Linux kernel did not properly initialize memory in some situations. A physically proximate attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2022-42895) José Oliveira and Rodrigo Branco discovered that the prctl syscall implementation in the Linux kernel did not properly protect against indirect branch prediction attacks in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2023-0045) It was discovered that the RNDIS USB driver in the Linux kernel contained an integer overflow vulnerability. A local attacker with physical access could plug in a malicious USB device to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-23559)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-4.4.0-1154-aws<4.4.0-1154.169
4.4.0-1154.169
=16.04
All of
ubuntu/linux-image-aws<4.4.0.1154.158
4.4.0.1154.158
=16.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this advisory?

    The vulnerability ID for this advisory is CVE-2021-4155.

  • What is the impact of CVE-2021-4155?

    CVE-2021-4155 can be used by a local attacker to expose sensitive information.

  • How can I fix the vulnerability in Ubuntu 16.04 with kernel version 4.4.0-1154.169?

    To fix the vulnerability, update the kernel to version 4.4.0-1154.169.

  • What is the vulnerability ID for the use-after-free vulnerability?

    The vulnerability ID for the use-after-free vulnerability is not provided in the given information.

  • Are there any known workarounds for these vulnerabilities?

    There are no known workarounds for these vulnerabilities, updating the kernel is recommended to mitigate the risk.

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