Advisory Published

USN-7455-2: Linux kernel (FIPS) vulnerabilities

First published: Thu Apr 24 2025(Updated: )

Jann Horn discovered that the watch_queue event notification subsystem in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (system crash) or escalate their privileges. (CVE-2022-0995) 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-5.15.0-1081-gcp-fips<5.15.0-1081.90+fips1
5.15.0-1081.90+fips1
Ubuntu=22.04
All of
ubuntu/linux-image-5.15.0-1082-aws-fips<5.15.0-1082.89+fips1
5.15.0-1082.89+fips1
Ubuntu=22.04
All of
ubuntu/linux-image-5.15.0-138-fips<5.15.0-138.148+fips1
5.15.0-138.148+fips1
Ubuntu=22.04
All of
ubuntu/linux-image-aws-fips<5.15.0.1082.78
5.15.0.1082.78
Ubuntu=22.04
All of
ubuntu/linux-image-fips<5.15.0.138.78
5.15.0.138.78
Ubuntu=22.04
All of
ubuntu/linux-image-gcp-fips<5.15.0.1081.71
5.15.0.1081.71
Ubuntu=22.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-7455-2?

    The severity of USN-7455-2 is classified as significant due to the potential for denial of service and privilege escalation.

  • How do I fix USN-7455-2?

    To fix USN-7455-2, upgrade to the recommended Linux kernel versions specified in the advisory.

  • What systems are affected by USN-7455-2?

    USN-7455-2 affects specific Ubuntu 22.04 systems running vulnerable Linux kernel versions.

  • Can USN-7455-2 lead to remote exploitation?

    No, USN-7455-2 requires local access to exploit the vulnerability.

  • What is the nature of the vulnerability in USN-7455-2?

    The vulnerability in USN-7455-2 is an out-of-bounds write in the Linux kernel's watch_queue event notification subsystem.

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