=========================================================================
Ubuntu Security Notice USN-7455-5
April 29, 2025

linux-aws-5.15 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems

Details:

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:
  - iSCSI Boot Firmware Table Attributes driver;
  - Network drivers;
  - File systems infrastructure;
  - NTFS3 file system;
  - Ethernet bridge;
  - Ethtool driver;
  - IPv6 networking;
  - Network traffic control;
  - VMware vSockets driver;
(CVE-2024-26837, CVE-2025-21993, CVE-2025-21702, CVE-2024-50248,
CVE-2024-46826, CVE-2024-50256, CVE-2025-21703, CVE-2025-21700,
CVE-2025-21756, CVE-2025-21701, CVE-2024-56651)

Update instructions:

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

Ubuntu 20.04 LTS
  linux-image-5.15.0-1082-aws     5.15.0-1082.89~20.04.1
  linux-image-aws                 5.15.0.1082.89~20.04.1

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-7455-5
  https://ubuntu.com/security/notices/USN-7455-4
  https://ubuntu.com/security/notices/USN-7455-3
  https://ubuntu.com/security/notices/USN-7455-2
  https://ubuntu.com/security/notices/USN-7455-1
  CVE-2022-0995, CVE-2024-26837, CVE-2024-46826, CVE-2024-50248,
  CVE-2024-50256, CVE-2024-56651, CVE-2025-21700, CVE-2025-21701,
  CVE-2025-21702, CVE-2025-21703, CVE-2025-21756, CVE-2025-21993

Package Information:
  https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1082.89~20.04.1