CWE
416 362
Advisory Published

USN-5002-1: Linux kernel (HWE) vulnerability

First published: Wed Jun 23 2021(Updated: )

Norbert Slusarek discovered a race condition in the CAN BCM networking protocol of the Linux kernel leading to multiple use-after-free vulnerabilities. A local attacker could use this issue to execute arbitrary code.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-gkeop-5.3<5.3.0.75.132
5.3.0.75.132
=18.04
All of
ubuntu/linux-image-gke-5.3<5.3.0.1044.27
5.3.0.1044.27
=18.04
All of
ubuntu/linux-image-5.3.0-1044-gke<5.3.0-1044.47
5.3.0-1044.47
=18.04
All of
ubuntu/linux-image-5.3.0-1041-raspi2<5.3.0-1041.43
5.3.0-1041.43
=18.04
All of
ubuntu/linux-image-5.3.0-75-lowlatency<5.3.0-75.71
5.3.0-75.71
=18.04
All of
ubuntu/linux-image-5.3.0-75-generic<5.3.0-75.71
5.3.0-75.71
=18.04
All of
ubuntu/linux-image-raspi2-hwe-18.04<5.3.0.1041.30
5.3.0.1041.30
=18.04

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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 CVE-2021-3609.

  • How severe is CVE-2021-3609?

    CVE-2021-3609 is a race condition vulnerability in the Linux kernel that could allow a local attacker to execute arbitrary code.

  • Which versions of Ubuntu are affected by CVE-2021-3609?

    Ubuntu version 18.04 is affected by CVE-2021-3609.

  • How do I fix CVE-2021-3609?

    To fix CVE-2021-3609, update your Ubuntu system to the specified Linux kernel versions: 5.3.0.75.132, 5.3.0.1044.27, 5.3.0-1044.47, 5.3.0-1041.43, 5.3.0-75.71, 5.3.0-75-generic, or 5.3.0.1041.30.

  • Where can I find more information about this vulnerability?

    You can find more information about CVE-2021-3609 on the Ubuntu Security Notices: USN-4997-1 and USN-4999-1.

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