Advisory Published

USN-7455-4: Linux kernel (Oracle) vulnerabilities

First published: Fri Apr 25 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-5.15.0-1079-oracle<5.15.0-1079.85~20.04.1
5.15.0-1079.85~20.04.1
Ubuntu=20.04
All of
ubuntu/linux-image-oracle<5.15.0.1079.85~20.04.1
5.15.0.1079.85~20.04.1
Ubuntu=20.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-7455-4?

    USN-7455-4 is classified as a high-severity vulnerability due to its potential for privilege escalation and denial of service.

  • How do I fix USN-7455-4?

    To address USN-7455-4, update your Ubuntu system to the latest kernel version recommended in the advisory.

  • Who discovered USN-7455-4?

    USN-7455-4 was discovered by security researcher Jann Horn.

  • What kind of attack can exploit USN-7455-4?

    A local attacker can exploit USN-7455-4 to cause a system crash or escalate their privileges.

  • Which systems are affected by USN-7455-4?

    USN-7455-4 affects Ubuntu 20.04 with specific Linux kernel versions related to the advisory.

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