1. Ubuntu Security Notices
  2. USN-7506-4

USN-7506-4: Linux kernel (Xenial HWE) vulnerabilities

Publication date

13 May 2025

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

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:

  • Hardware crypto device drivers;
  • GPU drivers;
  • IIO subsystem;
  • Media drivers;
  • Network drivers;
  • SCSI subsystem;
  • SPI subsystem;
  • USB Gadget drivers;
  • Ceph distributed file system;
  • File systems infrastructure;
  • JFS file system;
  • Network file system (NFS) client;
  • Network file system (NFS) server...

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:

  • Hardware crypto device drivers;
  • GPU drivers;
  • IIO subsystem;
  • Media drivers;
  • Network drivers;
  • SCSI subsystem;
  • SPI subsystem;
  • USB Gadget drivers;
  • Ceph distributed file system;
  • File systems infrastructure;
  • JFS file system;
  • Network file system (NFS) client;
  • Network file system (NFS) server daemon;
  • NILFS2 file system;
  • SMB network file system;
  • CAN network layer;
  • IPv6 networking;
  • MAC80211 subsystem;
  • Netfilter;
  • Netlink;
  • Network traffic control;
  • SCTP protocol;
  • TIPC protocol

Update instructions

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

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
14.04 trusty linux-image-4.4.0-268-generic –  4.4.0-268.302~14.04.1  
linux-image-4.4.0-268-lowlatency –  4.4.0-268.302~14.04.1  
linux-image-generic-lts-xenial –  4.4.0.268.302~14.04.1  
linux-image-lowlatency-lts-xenial –  4.4.0.268.302~14.04.1  
linux-image-virtual-lts-xenial –  4.4.0.268.302~14.04.1  

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References

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