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

USN-7506-1: Linux kernel vulnerabilities

Publication date

12 May 2025

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-kvm - Linux kernel for cloud environments

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
16.04 xenial linux-image-4.4.0-1144-kvm –  4.4.0-1144.155  
linux-image-4.4.0-1181-aws –  4.4.0-1181.196  
linux-image-4.4.0-268-generic –  4.4.0-268.302  
linux-image-4.4.0-268-lowlatency –  4.4.0-268.302  
linux-image-aws –  4.4.0.1181.185  
linux-image-generic –  4.4.0.268.274  
linux-image-generic-lts-xenial –  4.4.0.268.274  
linux-image-kvm –  4.4.0.1144.141  
linux-image-lowlatency –  4.4.0.268.274  
linux-image-lowlatency-lts-xenial –  4.4.0.268.274  
linux-image-virtual –  4.4.0.268.274  
linux-image-virtual-lts-xenial –  4.4.0.268.274  

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References

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