1. Ubuntu Security Notices
  2. USN-7342-1

USN-7342-1: Linux kernel vulnerabilities

Publication date

11 March 2025

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux - Linux kernel
  • linux-hwe - Linux hardware enablement (HWE) kernel

Details

Chenyuan Yang discovered that the CEC driver driver in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2024-23848)

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:

  • PowerPC architecture;
  • GPIO subsystem;
  • GPU drivers;
  • Media drivers;
  • Network drivers;
  • SCSI subsystem;
  • Direct Digital Synthesis drivers;
  • TTY drivers;
  • 9P distributed file system;
  • JFS file system;
  • NILFS2 file system;
  • File systems infrastructure;
  • BPF subsystem;
  • Netfilter;
  • Memory management;
  • Amateur Radio drivers;
  • B.A.T.M.A.N. meshing...

Chenyuan Yang discovered that the CEC driver driver in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2024-23848)

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:

  • PowerPC architecture;
  • GPIO subsystem;
  • GPU drivers;
  • Media drivers;
  • Network drivers;
  • SCSI subsystem;
  • Direct Digital Synthesis drivers;
  • TTY drivers;
  • 9P distributed file system;
  • JFS file system;
  • NILFS2 file system;
  • File systems infrastructure;
  • BPF subsystem;
  • Netfilter;
  • Memory management;
  • Amateur Radio drivers;
  • B.A.T.M.A.N. meshing protocol;
  • Bluetooth subsystem;
  • Ethernet bridge;
  • Networking core;
  • IPv4 networking;
  • IPv6 networking;
  • Open vSwitch;
  • Network traffic control;
  • TIPC protocol;
  • Wireless networking

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
18.04 bionic linux-image-4.15.0-235-generic –  4.15.0-235.247  
linux-image-4.15.0-235-lowlatency –  4.15.0-235.247  
linux-image-generic –  4.15.0.235.219  
linux-image-lowlatency –  4.15.0.235.219  
linux-image-virtual –  4.15.0.235.219  
16.04 xenial linux-image-4.15.0-235-generic –  4.15.0-235.247~16.04.1  
linux-image-4.15.0-235-lowlatency –  4.15.0-235.247~16.04.1  
linux-image-generic-hwe-16.04 –  4.15.0.235.247~16.04.1  
linux-image-lowlatency-hwe-16.04 –  4.15.0.235.247~16.04.1  
linux-image-oem –  4.15.0.235.247~16.04.1  
linux-image-virtual-hwe-16.04 –  4.15.0.235.247~16.04.1  

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References

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