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[USN-7795-4] Linux kernel (Oracle) vulnerabilities

Posted on 24 October 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7795-4
October 24, 2025

linux-oracle-5.4 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems

Details:

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:
- Ext4 file system;
- Network file system (NFS) server daemon;
- Packet sockets;
- Network traffic control;
- VMware vSockets driver;
(CVE-2025-38617, CVE-2025-21796, CVE-2025-38618, CVE-2025-37785,
CVE-2025-38477)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS
linux-image-5.4.0-1149-oracle 5.4.0-1149.159~18.04.1
Available with Ubuntu Pro
linux-image-oracle 5.4.0.1149.159~18.04.1
Available with Ubuntu Pro
linux-image-oracle-5.4 5.4.0.1149.159~18.04.1
Available with Ubuntu Pro

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
https://ubuntu.com/security/notices/USN-7795-4
https://ubuntu.com/security/notices/USN-7795-3
https://ubuntu.com/security/notices/USN-7795-2
https://ubuntu.com/security/notices/USN-7795-1
CVE-2025-21796, CVE-2025-37785, CVE-2025-38477, CVE-2025-38617,
CVE-2025-38618


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