Advisory Published

USN-7428-2: Linux kernel (FIPS) vulnerabilities

First published: Wed Apr 09 2025(Updated: )

Demi Marie Obenour and Simon Gaiser discovered that several Xen para- virtualization device frontends did not properly restrict the access rights of device backends. An attacker could possibly use a malicious Xen backend to gain access to memory pages of a guest VM or cause a denial of service in the guest. (CVE-2022-23041) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-4.15.0-1134-fips<4.15.0-1134.145
4.15.0-1134.145
Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-2080-gcp-fips<4.15.0-2080.86
4.15.0-2080.86
Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-2096-azure-fips<4.15.0-2096.102
4.15.0-2096.102
Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-2117-aws-fips<4.15.0-2117.123
4.15.0-2117.123
Ubuntu=18.04
All of
ubuntu/linux-image-aws-fips<4.15.0.2117.111
4.15.0.2117.111
Ubuntu=18.04
All of
ubuntu/linux-image-azure-fips<4.15.0.2096.92
4.15.0.2096.92
Ubuntu=18.04
All of
ubuntu/linux-image-fips<4.15.0.1134.131
4.15.0.1134.131
Ubuntu=18.04
All of
ubuntu/linux-image-gcp-fips<4.15.0.2080.78
4.15.0.2080.78
Ubuntu=18.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-7428-2?

    USN-7428-2 is classified as a high severity vulnerability due to its potential for unauthorized access to memory pages of guest VMs.

  • How do I fix USN-7428-2?

    To mitigate USN-7428-2, you should update to the recommended kernel version 4.15.0-1134.145 or higher on affected Ubuntu 18.04 systems.

  • What specific systems are affected by USN-7428-2?

    USN-7428-2 affects various Ubuntu 18.04 systems running certain Xen para-virtualization device frontends.

  • What are the possible impacts of USN-7428-2?

    An attacker exploiting USN-7428-2 could gain access to sensitive memory of a guest VM or cause a denial of service.

  • Who discovered USN-7428-2?

    USN-7428-2 was discovered by security researchers Demi Marie Obenour and Simon Gaiser.

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