1. Ubuntu Security Notices
  2. USN-9020-1

USN-9020-1: Linux kernel vulnerabilities

Publication date

10 November 2026

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

It was discovered that the io_uring subsystem in the Linux kernel contained
a memory leak when handling certain asynchronous commands. A local attacker
could possibly use this to cause a denial of service (memory exhaustion).
(CVE-2026-80811)

It was discovered that the io_uring subsystem in the Linux kernel did not
properly validate the size of certain query requests. A local attacker
could possibly use this to cause a denial of service (system hang).
(CVE-2026-81009)

It was discovered that the io_uring subsystem in the Linux kernel did not
properly handle canceled task work when processing certain wait operations,
leading to the operation being performed in the wrong task context. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2026-81010)

It was discovered...

It was discovered that the io_uring subsystem in the Linux kernel contained
a memory leak when handling certain asynchronous commands. A local attacker
could possibly use this to cause a denial of service (memory exhaustion).
(CVE-2026-80811)

It was discovered that the io_uring subsystem in the Linux kernel did not
properly validate the size of certain query requests. A local attacker
could possibly use this to cause a denial of service (system hang).
(CVE-2026-81009)

It was discovered that the io_uring subsystem in the Linux kernel did not
properly handle canceled task work when processing certain wait operations,
leading to the operation being performed in the wrong task context. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2026-81010)

It was discovered that the io_uring subsystem in the Linux kernel did not
properly track buffer consumption when receiving truncated network
messages. A remote attacker could possibly use this to corrupt the receive
buffers of certain applications, resulting in a denial of service or
another unspecified impact. (CVE-2026-97618)

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:

  • USB Gadget drivers;
  • Memory management;
  • Multiple devices driver;
  • ARM64 architecture;
  • EROFS file system;
  • Network file systems library;
  • Networking core;
  • eXpress Data Path;
  • Stream parser;
  • ARM32 architecture;
  • M68K architecture;
  • MIPS architecture;
  • OpenRISC architecture;
  • PA-RISC architecture;
  • PowerPC architecture;
  • RISC-V architecture;
  • S390 architecture;
  • User-Mode Linux (UML);
  • x86 architecture;
  • Block layer subsystem;
  • Cryptographic API;
  • Compute Acceleration Framework;
  • Intel NPU Driver;
  • Speakup Console Speech Driver;
  • ACPI drivers;
  • Android drivers;
  • Serial ATA and Parallel ATA drivers;
  • Auxiliary display drivers;
  • Drivers core;
  • Micron PCIe SSD driver;
  • Null block device driver;
  • Ublk userspace block driver;
  • Compressed RAM block device driver;
  • Bluetooth drivers;
  • Bus devices;
  • AMD CDX bus driver;
  • Hardware random number generator core;
  • Character device driver;
  • TPM device driver;
  • Clock framework and drivers;
  • Clocksource drivers;
  • CPU frequency scaling framework;
  • CPU idle management framework;
  • 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 SCMI message protocol;
  • ARM SCPI message protocol;
  • Google firmware drivers;
  • Qualcomm firmware drivers;
  • FPGA Framework;
  • GPIO subsystem;
  • GPU drivers;
  • HID subsystem;
  • HSI subsystem;
  • Microsoft Hyper-V drivers;
  • Hardware monitoring drivers;
  • CoreSight HW tracing drivers;
  • I2C subsystem;
  • I3C subsystem;
  • IIO subsystem;
  • IIO ADC drivers;
  • InfiniBand drivers;
  • Input Device core drivers;
  • Input Device (Miscellaneous) drivers;
  • Input Device (Mouse) drivers;
  • On-Chip Interconnect management framework;
  • IOMMU subsystem;
  • Industry Pack bus drivers;
  • IRQ chip drivers;
  • Mailbox framework;
  • Media drivers;
  • MemoryStick subsystem;
  • Multifunction device drivers;
  • Analog Devices digital potentiometer driver;
  • Broadcom VK accelerator driver;
  • Fastrpc Driver;
  • Amazon Nitro Secure Module driver;
  • SGI GRU driver;
  • MMC subsystem;
  • MTD block device drivers;
  • Network drivers;
  • Ethernet bonding driver;
  • Mellanox network drivers;
  • Microsoft Azure Network Adapter (MANA) driver;
  • STMicroelectronics network drivers;
  • Texas Instruments network drivers;
  • Ethernet team driver;
  • MediaTek network drivers;
  • Near Field Communication (NFC) drivers;
  • NTB driver;
  • NVDIMM (Non-Volatile Memory Device) drivers;
  • NVME drivers;
  • Device tree and open firmware driver;
  • Operating Performance Points (OPP) driver;
  • PA-RISC drivers;
  • PCI subsystem;
  • Performance monitor drivers;
  • PHY drivers;
  • Pin controllers subsystem;
  • Chrome hardware platform drivers;
  • Mellanox platform drivers;
  • Microsoft Surface platform drivers;
  • x86 platform drivers;
  • MediaTek PM domains;
  • Power sequencing drivers;
  • Power supply drivers;
  • Powercap sysfs driver;
  • PTP clock framework;
  • PWM drivers;
  • RapidIO drivers;
  • Voltage and Current Regulator drivers;
  • Remote Processor subsystem;
  • MPAM driver;
  • RPMSG subsystem;
  • Real Time Clock drivers;
  • S/390 drivers;
  • SCSI subsystem;
  • ASPEED SoC drivers;
  • Samsung SoC drivers;
  • SPI subsystem;
  • small TFT LCD display modules;
  • Greybus lights staging drivers;
  • Media staging drivers;
  • Realtek RTL8723BS SDIO drivers;
  • TCM subsystem;
  • Trusted Execution Environment drivers;
  • Thermal drivers;
  • Thunderbolt and USB4 drivers;
  • TTY drivers;
  • UFS subsystem;
  • Userspace I/O drivers;
  • USB DSL drivers;
  • Cypress C67X00 USB driver;
  • Cadence USB3 driver;
  • USB Device Class drivers;
  • USB core drivers;
  • DesignWare USB2 driver;
  • DesignWare USB3 driver;
  • USB Host Controller drivers;
  • Mustek MDC800 USB digital camera driver;
  • Intel La Jolla Cove Adapter USB driver;
  • Intel USBIO USB I/O expander driver;
  • USB Serial drivers;
  • USB Mass Storage drivers;
  • USB Type-C support driver;
  • USB Type-C Port Controller Manager driver;
  • TI TPS6598x USB Power Delivery controller driver;
  • USB Type-C Connector System Software Interface driver;
  • USB over IP driver;
  • vDPA drivers;
  • VFIO drivers;
  • Virtio Host (VHOST) subsystem;
  • Framebuffer layer;
  • ACRN Hypervisor Service Module driver;
  • Amazon Nitro Enclaves driver;
  • Virtual machine generation ID driver;
  • Virtio drivers;
  • W1 Dallas's 1-wire bus driver;
  • Watchdog drivers;
  • Xen hypervisor drivers;
  • 9P distributed file system;
  • File systems infrastructure;
  • AFS file system;
  • BFS file system;
  • BTRFS file system;
  • Ceph distributed file system;
  • debug file system;
  • eCrypt file system;
  • EFI Variable file system;
  • exFAT file system;
  • Ext4 file system;
  • F2FS file system;
  • FAT file system;
  • FUSE (File system in Userspace);
  • GFS2 file system;
  • HFS+ file system;
  • HugeTLB file system;
  • Journaling layer for block devices (JBD2);
  • JFS file system;
  • Network file system (NFS) client;
  • Network file system (NFS) server daemon;
  • NILFS2 file system;
  • File system notification infrastructure;
  • NTFS3 file system;
  • OCFS2 file system;
  • OrangeFS file system;
  • Overlay file system;
  • SMB network file system;
  • SquashFS file system;
  • Tracing file system;
  • UBI file system;
  • UDF file system;
  • XFS file system;
  • BPF subsystem;
  • Tracing infrastructure;
  • Kernel futex primitives;
  • Memory Management;
  • VLANs driver;
  • IPv4 networking;
  • io_uring subsystem;
  • KProbes tracing;
  • KVM subsystem;
  • Live Update Orchestrator (LUO);
  • Netfilter;
  • Namespaces infrastructure;
  • Perf events;
  • Scheduler infrastructure;
  • Signal handling mechanism;
  • Networking subsytem;
  • Slab allocator;
  • Sun RPC protocol;
  • Vector I/O iterator library;
  • Virtio network driver;
  • Network traffic control;
  • IPv6 networking;
  • Bluetooth subsystem;
  • IEEE 802.15.4 subsystem;
  • IP tunnels definitions;
  • MAC80211 subsystem;
  • NFC subsystem;
  • SCTP protocol;
  • Network sockets;
  • TCP network protocol;
  • User-space API (UAPI);
  • Kernel init infrastructure;
  • Audit subsystem;
  • Control group (cgroup);
  • Kernel crash support code;
  • DMA mapping infrastructure;
  • Kernel exit() syscall;
  • Kernel fork() syscall;
  • IRQ subsystem;
  • KCOV code coverage framework;
  • Kexec HandOver (KHO);
  • Locking primitives;
  • Kernel module support;
  • Kernel command line parsing driver;
  • PID allocator;
  • printk logging mechanism;
  • System reboot mechanism;
  • Timer subsystem;
  • Workqueue subsystem;
  • Kernel build system;
  • Heterogeneous memory management;
  • UCS-2 string library;
  • KASAN memory debugging framework;
  • 802.1Q VLAN protocol;
  • Appletalk network protocol;
  • Asynchronous Transfer Mode (ATM) subsystem;
  • B.A.T.M.A.N. meshing protocol;
  • Ethernet bridge;
  • CAN network layer;
  • Ceph Core library;
  • Devlink API;
  • Distributed Switch Architecture;
  • HSR network protocol;
  • IEEE802154.4 network protocol;
  • IFE protocol;
  • IUCV driver;
  • KCM (Kernel Connection Multiplexor) sockets driver;
  • L2TP protocol;
  • Logical Link layer;
  • Management Component Transport Protocol (MCTP);
  • MultiProtocol Label Switching driver;
  • Multipath TCP;
  • NCSI (Network Controller Sideband Interface) driver;
  • Netlink;
  • Open vSwitch;
  • Packet sockets;
  • Phonet protocol;
  • PSP security protocol;
  • Qualcomm IPC Router (QRTR);
  • RDS protocol;
  • SMC sockets;
  • TIPC protocol;
  • TLS protocol;
  • Unix domain sockets;
  • VMware vSockets driver;
  • Wireless networking;
  • X.25 network layer;
  • XFRM subsystem;
  • AppArmor security module;
  • Integrity Measurement Architecture(IMA) framework;
  • Linux Security Modules (LSM) Framework;
  • Key management;
  • Landlock security;
  • SELinux security module;
  • Simplified Mandatory Access Control Kernel framework;
  • ALSA framework;
  • Generic PCM loopback sound driver;
  • Generic sound devices;
  • HD-audio driver;
  • ESS ES18xx ALSA driver;
  • Creative Sound Blaster X-Fi driver;
  • ICE1712/ICE1724 (Envy24) ALSA driver;
  • Digigram PCXHR ALSA driver;
  • AMD SoC Alsa drivers;
  • Analog Devices audio codecs;
  • Cirrus Logic audio codecs;
  • QCOM ASoC drivers;
  • Maxim audio codecs;
  • Realtek audio codecs;
  • Texas InstrumentS Audio (ASoC/HDA) drivers;
  • SoC Audio for Freescale CPUs drivers;
  • Intel ASoC drivers;
  • MediaTek ASoC drivers;
  • Amlogic Meson SoC drivers;
  • Rockchip ASoC drivers;
  • Samsung ASoC drivers;
  • SoundWire (SDCA) ASoC drivers;
  • SoC audio core drivers;
  • SOF drivers;
  • Spreadtrum ASoC drivers;
  • STI ASoC drivers;
  • Xilinx ASoC drivers;
  • USB sound devices;
  • Virtio sound driver

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-7.0.0-1010-gke –  7.0.0-1010.11
linux-image-7.0.0-1010-gke-64k –  7.0.0-1010.11
linux-image-7.0.0-1019-azure-fde –  7.0.0-1019.19
linux-image-7.0.0-43-realtime –  7.0.0-43.43.1
linux-image-7.0.0-43-realtime-64k –  7.0.0-43.43.1
linux-image-azure-fde –  7.0.0-1019.19
linux-image-azure-fde-7.0 –  7.0.0-1019.19
linux-image-azure-fde-lts-26.04 –  7.0.0-1019.19
linux-image-gke –  7.0.0-1010.11
linux-image-gke-64k –  7.0.0-1010.11
linux-image-gke-64k-7.0 –  7.0.0-1010.11
linux-image-gke-64k-hwe-26.04 –  7.0.0-1010.11
linux-image-gke-7.0 –  7.0.0-1010.11
linux-image-gke-hwe-26.04 –  7.0.0-1010.11
linux-image-realtime –  7.0.0-43.43.1
linux-image-realtime-64k –  7.0.0-43.43.1
linux-image-realtime-64k-7.0 –  7.0.0-43.43.1
linux-image-realtime-64k-hwe-26.04 –  7.0.0-43.43.1
linux-image-realtime-7.0 –  7.0.0-43.43.1
linux-image-realtime-hwe-26.04 –  7.0.0-43.43.1
24.04 LTS noble linux-image-7.0.0-1016-oracle –  7.0.0-1016.18~24.04.1
linux-image-7.0.0-1016-oracle-64k –  7.0.0-1016.18~24.04.1
linux-image-7.0.0-1017-aws –  7.0.0-1017.18~24.04.1
linux-image-7.0.0-1017-aws-64k –  7.0.0-1017.18~24.04.1
linux-image-7.0.0-1017-gcp –  7.0.0-1017.19~24.04.1
linux-image-7.0.0-1017-gcp-64k –  7.0.0-1017.19~24.04.1
linux-image-7.0.0-1019-azure-fde –  7.0.0-1019.19~24.04.1
linux-image-aws –  7.0.0-1017.18~24.04.1
linux-image-aws-64k –  7.0.0-1017.18~24.04.1
linux-image-aws-64k-7.0 –  7.0.0-1017.18~24.04.1
linux-image-aws-7.0 –  7.0.0-1017.18~24.04.1
linux-image-azure-fde –  7.0.0-1019.19~24.04.1
linux-image-azure-fde-7.0 –  7.0.0-1019.19~24.04.1
linux-image-gcp –  7.0.0-1017.19~24.04.1
linux-image-gcp-64k –  7.0.0-1017.19~24.04.1
linux-image-gcp-64k-7.0 –  7.0.0-1017.19~24.04.1
linux-image-gcp-7.0 –  7.0.0-1017.19~24.04.1
linux-image-oracle –  7.0.0-1016.18~24.04.1
linux-image-oracle-64k –  7.0.0-1016.18~24.04.1
linux-image-oracle-64k-7.0 –  7.0.0-1016.18~24.04.1
linux-image-oracle-7.0 –  7.0.0-1016.18~24.04.1

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References

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