1. Ubuntu Security Notices
  2. USN-8889-1

USN-8889-1: Linux kernel (OEM) vulnerabilities

Publication date

6 October 2026

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

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-7.0.0-1015-oem –  7.0.0-1015.15
linux-image-oem-26.04 –  7.0.0-1015.15
linux-image-oem-26.04a –  7.0.0-1015.15
linux-image-oem-7.0 –  7.0.0-1015.15

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References

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