1. Ubuntu Security Notices
  2. USN-8887-1

USN-8887-1: Linux kernel vulnerabilities

Publication date

6 October 2026

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-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-gke - Linux kernel for Google Container Engine (GKE) systems
  • linux-ibm - Linux kernel for IBM cloud systems
  • linux-oracle - Linux kernel for Oracle Cloud systems
  • linux-realtime - Linux kernel for Real-time systems

Details

It was discovered that some AMD processors did not properly perform Reverse
Map Table (RMP) checks when the IOMMU accessed certain host buffers. A
local attacker with hypervisor access could possibly use this to trigger an
out-of-bounds condition and compromise the integrity of SEV-SNP guest
memory. (CVE-2023-20585)

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;
  • NVDIMM (Non-Volatile Memory Device) drivers;
  • Handshake API;
  • ARM32 architecture;
  • MIPS architecture;
  • OpenRISC architecture;
  • PowerPC architecture;
  • RISC-V architecture;
  • S390 architecture;
  • x86 architecture;
  • Cryptographic API;
  • Compute Acceleration Framework;
  • Intel NPU Driver;
  • ACPI...

It was discovered that some AMD processors did not properly perform Reverse
Map Table (RMP) checks when the IOMMU accessed certain host buffers. A
local attacker with hypervisor access could possibly use this to trigger an
out-of-bounds condition and compromise the integrity of SEV-SNP guest
memory. (CVE-2023-20585)

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;
  • NVDIMM (Non-Volatile Memory Device) drivers;
  • Handshake API;
  • ARM32 architecture;
  • MIPS architecture;
  • OpenRISC architecture;
  • PowerPC architecture;
  • RISC-V architecture;
  • S390 architecture;
  • x86 architecture;
  • Cryptographic API;
  • Compute Acceleration Framework;
  • Intel NPU Driver;
  • ACPI drivers;
  • Android drivers;
  • Serial ATA and Parallel ATA drivers;
  • Drivers core;
  • Rados block device (RBD) driver;
  • Ublk userspace block driver;
  • Bluetooth drivers;
  • Cdrom driver;
  • Character device driver;
  • TPM device driver;
  • Data acquisition framework and drivers;
  • Hardware crypto device drivers;
  • CXL (Compute Express Link) drivers;
  • DAX dirext access to differentiated memory framework;
  • DIBS (Direct Internal Buffer Sharing) drivers;
  • Buffer Sharing and Synchronization framework;
  • DMA engine subsystem;
  • DPLL subsystem;
  • EDAC drivers;
  • FireWire subsystem;
  • Arm Firmware Framework for ARMv8-A(FFA);
  • ARM SCMI message protocol;
  • Intel Stratix 10 firmware drivers;
  • FPGA Framework;
  • GPIB drivers;
  • GPIO subsystem;
  • GPU drivers;
  • HID subsystem;
  • Microsoft Hyper-V drivers;
  • Hardware monitoring drivers;
  • CoreSight HW tracing drivers;
  • Intel Trace Hub HW tracing drivers;
  • I2C subsystem;
  • I3C subsystem;
  • IIO subsystem;
  • IIO ADC drivers;
  • IIO Magnetometer sensors drivers;
  • InfiniBand drivers;
  • Input Device (Miscellaneous) drivers;
  • IOMMU subsystem;
  • IRQ chip drivers;
  • LED subsystem;
  • Mailbox framework;
  • Multiple devices driver;
  • Media drivers;
  • MemoryStick subsystem;
  • Multifunction device drivers;
  • Intel Management Engine Interface driver;
  • Amazon Nitro Secure Module driver;
  • MMC subsystem;
  • MTD block device drivers;
  • Network drivers;
  • Ethernet bonding driver;
  • Mellanox network drivers;
  • Microsoft Azure Network Adapter (MANA) driver;
  • Texas Instruments network drivers;
  • MediaTek network drivers;
  • NTB driver;
  • NVME drivers;
  • Device tree and open firmware driver;
  • Operating Performance Points (OPP) driver;
  • PCI subsystem;
  • Pin controllers subsystem;
  • x86 platform drivers;
  • i.MX PM domains;
  • MediaTek PM domains;
  • Power supply drivers;
  • PTP clock framework;
  • RapidIO drivers;
  • Voltage and Current Regulator drivers;
  • Remote Processor subsystem;
  • MPAM driver;
  • Reset controller framework;
  • Real Time Clock drivers;
  • S/390 drivers;
  • SCSI subsystem;
  • Xilinx SoC drivers;
  • SoundWire subsystem;
  • SPI subsystem;
  • Media staging drivers;
  • Media Oriented Systems Transport (MOST) driver;
  • NVIDIA Tegra embedded controller (NVEC) staging driver;
  • Realtek RTL8723BS SDIO drivers;
  • TTY drivers;
  • UFS subsystem;
  • USB DSL drivers;
  • USB core drivers;
  • DesignWare USB3 driver;
  • USB Gadget drivers;
  • USB Host Controller drivers;
  • USB Dual Role (OTG-ready) Controller drivers;
  • USB Serial drivers;
  • vDPA drivers;
  • VFIO drivers;
  • Virtio Host (VHOST) subsystem;
  • Framebuffer layer;
  • Virtio drivers;
  • Watchdog drivers;
  • Xen hypervisor drivers;
  • 9P distributed file system;
  • AFS file system;
  • File systems infrastructure;
  • BTRFS file system;
  • Ceph distributed file system;
  • Ext4 file system;
  • F2FS file system;
  • FUSE (File system in Userspace);
  • Journaling layer for block devices (JBD2);
  • Network file systems library;
  • Network file system (NFS) client;
  • Network file system (NFS) server daemon;
  • NTFS3 file system;
  • OCFS2 file system;
  • Overlay file system;
  • Proc file system;
  • SMB network file system;
  • BPF subsystem;
  • File system encryption (fscrypt);
  • MAC80211 subsystem;
  • Live Update Orchestrator (LUO);
  • Mellanox drivers;
  • Networking core;
  • Memory Management;
  • Media input infrastructure;
  • IPv6 networking;
  • Bluetooth subsystem;
  • Wireless networking;
  • IPv4 networking;
  • Netfilter;
  • Network traffic control;
  • SCTP protocol;
  • TCP network protocol;
  • XFRM subsystem;
  • RDMA verbs API;
  • User-space API (UAPI);
  • Audit subsystem;
  • Control group (cgroup);
  • Kernel CPU control infrastructure;
  • Kernel exit() syscall;
  • Kernel fork() syscall;
  • Kexec HandOver (KHO);
  • Scheduler infrastructure;
  • Signal handling mechanism;
  • Timer subsystem;
  • Tracing infrastructure;
  • Codetag library;
  • Resizable hashtable library;
  • Memory management;
  • 9P file system network protocol;
  • Asynchronous Transfer Mode (ATM) subsystem;
  • B.A.T.M.A.N. meshing protocol;
  • Ethernet bridge;
  • CAN network layer;
  • Ceph Core library;
  • HSR network protocol;
  • IEEE802154.4 network protocol;
  • IUCV driver;
  • KCM (Kernel Connection Multiplexor) sockets driver;
  • Logical Link layer;
  • IEEE 802.15.4 subsystem;
  • MultiProtocol Label Switching driver;
  • Multipath TCP;
  • Open vSwitch;
  • Packet sockets;
  • Phonet protocol;
  • Packet sampling (psample);
  • Qualcomm IPC Router (QRTR);
  • RDS protocol;
  • RxRPC session sockets;
  • Sun RPC protocol;
  • TIPC protocol;
  • TLS protocol;
  • X.25 network layer;
  • AppArmor security module;
  • Integrity Measurement Architecture(IMA) framework;
  • Landlock security;
  • SELinux security module;
  • ALSA framework;
  • HD-audio driver;
  • AMD SoC Alsa drivers;
  • Texas InstrumentS Audio (ASoC/HDA) drivers;
  • SoC Audio for Freescale CPUs drivers;
  • MediaTek ASoC drivers;
  • Amlogic Meson SoC drivers;
  • QCOM ASoC drivers;
  • SoundWire (SDCA) ASoC drivers;
  • SoC audio core drivers;
  • SOF drivers;
  • NVIDIA Tegra ASoC drivers;
  • USB sound devices;
  • Perf tools;
  • 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
26.04 LTS resolute linux-image-7.0.0-1008-gke –  7.0.0-1008.9
linux-image-7.0.0-1008-gke-64k –  7.0.0-1008.9
linux-image-7.0.0-1013-oracle –  7.0.0-1013.13
linux-image-7.0.0-1013-oracle-64k –  7.0.0-1013.13
linux-image-7.0.0-1014-aws –  7.0.0-1014.14
linux-image-7.0.0-1014-aws-64k –  7.0.0-1014.14
linux-image-7.0.0-1014-gcp –  7.0.0-1014.14
linux-image-7.0.0-1014-gcp-64k –  7.0.0-1014.14
linux-image-7.0.0-1015-ibm –  7.0.0-1015.15
linux-image-7.0.0-38-generic –  7.0.0-38.38
linux-image-7.0.0-38-generic-64k –  7.0.0-38.38
linux-image-7.0.0-38-realtime –  7.0.0-38.38.1
linux-image-7.0.0-38-realtime-64k –  7.0.0-38.38.1
linux-image-aws –  7.0.0-1014.14
linux-image-aws-64k –  7.0.0-1014.14
linux-image-aws-64k-7.0 –  7.0.0-1014.14
linux-image-aws-7.0 –  7.0.0-1014.14
linux-image-gcp –  7.0.0-1014.14
linux-image-gcp-64k –  7.0.0-1014.14
linux-image-gcp-64k-7.0 –  7.0.0-1014.14
linux-image-gcp-7.0 –  7.0.0-1014.14
linux-image-generic –  7.0.0-38.38
linux-image-generic-64k –  7.0.0-38.38
linux-image-generic-64k-7.0 –  7.0.0-38.38
linux-image-generic-64k-hwe-26.04 –  7.0.0-38.38
linux-image-generic-7.0 –  7.0.0-38.38
linux-image-generic-hwe-26.04 –  7.0.0-38.38
linux-image-gke –  7.0.0-1008.9
linux-image-gke-64k –  7.0.0-1008.9
linux-image-gke-64k-7.0 –  7.0.0-1008.9
linux-image-gke-64k-hwe-26.04 –  7.0.0-1008.9
linux-image-gke-7.0 –  7.0.0-1008.9
linux-image-gke-hwe-26.04 –  7.0.0-1008.9
linux-image-ibm –  7.0.0-1015.15
linux-image-ibm-7.0 –  7.0.0-1015.15
linux-image-oracle –  7.0.0-1013.13
linux-image-oracle-64k –  7.0.0-1013.13
linux-image-oracle-64k-7.0 –  7.0.0-1013.13
linux-image-oracle-7.0 –  7.0.0-1013.13
linux-image-realtime –  7.0.0-38.38.1
linux-image-realtime-64k –  7.0.0-38.38.1
linux-image-realtime-64k-7.0 –  7.0.0-38.38.1
linux-image-realtime-64k-hwe-26.04 –  7.0.0-38.38.1
linux-image-realtime-7.0 –  7.0.0-38.38.1
linux-image-realtime-hwe-26.04 –  7.0.0-38.38.1
linux-image-virtual –  7.0.0-38.38
linux-image-virtual-7.0 –  7.0.0-38.38
linux-image-virtual-hwe-26.04 –  7.0.0-38.38

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References

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