CWE
416
Advisory Published

USN-4161-1: Linux kernel vulnerability

First published: Mon Oct 21 2019(Updated: )

It was discovered that the IPv6 routing implementation in the Linux kernel contained a reference counting error leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-5.3.0-19-lowlatency<5.3.0-19.20
5.3.0-19.20
Ubuntu=19.10
All of
ubuntu/linux-image-5.3.0-1005-gcp<5.3.0-1005.5
5.3.0-1005.5
Ubuntu=19.10
All of
ubuntu/linux-image-5.3.0-1004-kvm<5.3.0-1004.4
5.3.0-1004.4
Ubuntu=19.10
All of
ubuntu/linux-image-gke<5.3.0.1005.5
5.3.0.1005.5
Ubuntu=19.10
All of
ubuntu/linux-image-5.3.0-19-snapdragon<5.3.0-19.20
5.3.0-19.20
Ubuntu=19.10
All of
ubuntu/linux-image-generic<5.3.0.19.22
5.3.0.19.22
Ubuntu=19.10
All of
ubuntu/linux-image-5.3.0-1008-raspi2<5.3.0-1008.9
5.3.0-1008.9
Ubuntu=19.10
All of
ubuntu/linux-image-gcp<5.3.0.1005.5
5.3.0.1005.5
Ubuntu=19.10
All of
ubuntu/linux-image-5.3.0-1004-aws<5.3.0-1004.4
5.3.0-1004.4
Ubuntu=19.10
All of
ubuntu/linux-image-5.3.0-1004-azure<5.3.0-1004.4
5.3.0-1004.4
Ubuntu=19.10
All of
ubuntu/linux-image-5.3.0-19-generic<5.3.0-19.20
5.3.0-19.20
Ubuntu=19.10
All of
ubuntu/linux-image-virtual<5.3.0.19.22
5.3.0.19.22
Ubuntu=19.10
All of
ubuntu/linux-image-5.3.0-19-generic-lpae<5.3.0-19.20
5.3.0-19.20
Ubuntu=19.10
All of
ubuntu/linux-image-generic-lpae<5.3.0.19.22
5.3.0.19.22
Ubuntu=19.10
All of
ubuntu/linux-image-snapdragon<5.3.0.19.22
5.3.0.19.22
Ubuntu=19.10
All of
ubuntu/linux-image-aws<5.3.0.1004.5
5.3.0.1004.5
Ubuntu=19.10
All of
ubuntu/linux-image-kvm<5.3.0.1004.4
5.3.0.1004.4
Ubuntu=19.10
All of
ubuntu/linux-image-azure<5.3.0.1004.21
5.3.0.1004.21
Ubuntu=19.10
All of
ubuntu/linux-image-lowlatency<5.3.0.19.22
5.3.0.19.22
Ubuntu=19.10
All of
ubuntu/linux-image-raspi2<5.3.0.1008.4
5.3.0.1008.4
Ubuntu=19.10

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-4161-1?

    The severity of USN-4161-1 is classified as high due to the potential for a denial of service or arbitrary code execution.

  • How do I fix USN-4161-1?

    To fix USN-4161-1, update the Linux kernel to the specified remedial versions, such as linux-image-5.3.0-19-lowlatency 5.3.0-19.20.

  • Who is affected by USN-4161-1?

    Users of Ubuntu 19.10 with specific Linux kernel versions are affected by USN-4161-1.

  • What type of vulnerability is reported in USN-4161-1?

    USN-4161-1 reports a use-after-free vulnerability in the IPv6 routing implementation of the Linux kernel.

  • Can USN-4161-1 be exploited remotely?

    USN-4161-1 cannot be exploited remotely as it requires local access to the system.

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