1. Ubuntu Security Notices
  2. USN-7879-1

USN-7879-1: Linux kernel vulnerabilities

Publication date

21 November 2025

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

It was discovered that improper initialization of CPU cache memory could
allow a local attacker with hypervisor access to overwrite SEV-SNP guest
memory resulting in loss of data integrity. (CVE-2024-36331)

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:

  • ARM64 architecture;
  • PowerPC architecture;
  • S390 architecture;
  • x86 architecture;
  • Network block device driver;
  • Character device driver;
  • Clock framework and drivers;
  • Data acquisition framework and drivers;
  • Hardware crypto device drivers;
  • Device frequency scaling framework;
  • DMA engine subsystem;
  • EDAC drivers;
  • GPU drivers;
  • HID subsystem;
  • Hardware monitoring drivers;
  • I2C subsystem;
  • IIO...

It was discovered that improper initialization of CPU cache memory could
allow a local attacker with hypervisor access to overwrite SEV-SNP guest
memory resulting in loss of data integrity. (CVE-2024-36331)

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:

  • ARM64 architecture;
  • PowerPC architecture;
  • S390 architecture;
  • x86 architecture;
  • Network block device driver;
  • Character device driver;
  • Clock framework and drivers;
  • Data acquisition framework and drivers;
  • Hardware crypto device drivers;
  • Device frequency scaling framework;
  • DMA engine subsystem;
  • EDAC drivers;
  • GPU drivers;
  • HID subsystem;
  • Hardware monitoring drivers;
  • I2C subsystem;
  • IIO subsystem;
  • IIO ADC drivers;
  • InfiniBand drivers;
  • Input Device core drivers;
  • Multiple devices driver;
  • Media drivers;
  • Network drivers;
  • Mellanox network drivers;
  • PCI subsystem;
  • PHY drivers;
  • Pin controllers subsystem;
  • x86 platform drivers;
  • Power supply drivers;
  • Powercap sysfs driver;
  • Voltage and Current Regulator drivers;
  • S/390 drivers;
  • ASPEED SoC drivers;
  • SPI subsystem;
  • small TFT LCD display modules;
  • Media staging drivers;
  • USB Gadget drivers;
  • vDPA drivers;
  • VFIO drivers;
  • Framebuffer layer;
  • Xen hypervisor drivers;
  • BTRFS file system;
  • Ceph distributed file system;
  • EFI Variable file system;
  • File systems infrastructure;
  • F2FS file system;
  • GFS2 file system;
  • Network file systems library;
  • Network file system (NFS) client;
  • Network file system (NFS) server daemon;
  • NILFS2 file system;
  • NTFS3 file system;
  • Proc file system;
  • SMB network file system;
  • DRM display driver;
  • io_uring subsystem;
  • Internal shared memory driver;
  • padata parallel execution mechanism;
  • Networking subsytem;
  • Bluetooth subsystem;
  • Netfilter;
  • UDP network protocol;
  • Tracing infrastructure;
  • BPF subsystem;
  • Perf events;
  • Padata parallel execution mechanism;
  • Codetag library;
  • KASAN memory debugging framework;
  • Memory management;
  • 802.1Q VLAN protocol;
  • Appletalk network protocol;
  • Asynchronous Transfer Mode (ATM) subsystem;
  • Networking core;
  • IPv4 networking;
  • IPv6 networking;
  • MAC80211 subsystem;
  • Multipath TCP;
  • Netlink;
  • RxRPC session sockets;
  • Network traffic control;
  • SMC sockets;
  • Sun RPC protocol;
  • TIPC protocol;
  • TLS protocol;
  • VMware vSockets driver;
  • Wireless networking;
  • XFRM subsystem;
  • ADI SoundPort AD1816A based soundcard drivers;
  • MediaTek ASoC drivers;
  • SOF drivers;
  • USB sound devices;
  • KVM subsystem

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
25.04 plucky linux-image-6.14.0-1016-realtime –  6.14.0-1016.16
linux-image-6.14.0-1017-aws –  6.14.0-1017.17
linux-image-6.14.0-1017-aws-64k –  6.14.0-1017.17
linux-image-6.14.0-1017-oracle –  6.14.0-1017.17
linux-image-6.14.0-1017-oracle-64k –  6.14.0-1017.17
linux-image-6.14.0-1020-gcp –  6.14.0-1020.21
linux-image-6.14.0-1020-gcp-64k –  6.14.0-1020.21
linux-image-6.14.0-36-generic –  6.14.0-36.36
linux-image-6.14.0-36-generic-64k –  6.14.0-36.36
linux-image-aws –  6.14.0-1017.17
linux-image-aws-6.14 –  6.14.0-1017.17
linux-image-aws-64k –  6.14.0-1017.17
linux-image-aws-64k-6.14 –  6.14.0-1017.17
linux-image-gcp –  6.14.0-1020.21
linux-image-gcp-6.14 –  6.14.0-1020.21
linux-image-gcp-64k –  6.14.0-1020.21
linux-image-gcp-64k-6.14 –  6.14.0-1020.21
linux-image-generic –  6.14.0-36.36
linux-image-generic-6.14 –  6.14.0-36.36
linux-image-generic-64k –  6.14.0-36.36
linux-image-generic-64k-6.14 –  6.14.0-36.36
linux-image-oem-24.04 –  6.14.0-36.36
linux-image-oem-24.04a –  6.14.0-36.36
linux-image-oracle –  6.14.0-1017.17
linux-image-oracle-6.14 –  6.14.0-1017.17
linux-image-oracle-64k –  6.14.0-1017.17
linux-image-oracle-64k-6.14 –  6.14.0-1017.17
linux-image-realtime –  6.14.0-1016.16
linux-image-realtime-6.14 –  6.14.0-1016.16
linux-image-virtual –  6.14.0-36.36
linux-image-virtual-6.14 –  6.14.0-36.36
24.04 LTS noble linux-image-6.14.0-36-generic –  6.14.0-36.36~24.04.1
linux-image-6.14.0-36-generic-64k –  6.14.0-36.36~24.04.1
linux-image-generic-6.14 –  6.14.0-36.36~24.04.1
linux-image-generic-64k-6.14 –  6.14.0-36.36~24.04.1
linux-image-generic-64k-hwe-24.04 –  6.14.0-36.36~24.04.1
linux-image-generic-hwe-24.04 –  6.14.0-36.36~24.04.1
linux-image-virtual-6.14 –  6.14.0-36.36~24.04.1
linux-image-virtual-hwe-24.04 –  6.14.0-36.36~24.04.1

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References

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