1. Ubuntu Security Notices
  2. USN-8728-1

USN-8728-1: Linux kernel (GCP) vulnerabilities

Publication date

7 September 2026

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux-gcp-7.0 - Linux kernel for Google Cloud Platform (GCP) systems

Details

It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)

It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)

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:

  • x86 platform...

It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)

It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)

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:

  • x86 platform drivers;
  • ARM64 architecture;
  • Cryptographic API;
  • PSP security protocol;
  • User-space API (UAPI);
  • Kernel build system;
  • ARM32 architecture;
  • MIPS architecture;
  • PowerPC architecture;
  • RISC-V architecture;
  • S390 architecture;
  • User-Mode Linux (UML);
  • x86 architecture;
  • Block layer subsystem;
  • Compute Acceleration Framework;
  • Intel NPU Driver;
  • ACPI drivers;
  • Android drivers;
  • Auxiliary display drivers;
  • Drivers core;
  • DRBD Distributed Replicated Block Device drivers;
  • Rados block device (RBD) driver;
  • Ublk userspace block driver;
  • Compressed RAM block device driver;
  • Bluetooth drivers;
  • Bus devices;
  • Character device driver;
  • Hardware random number generator core;
  • Clock framework and drivers;
  • CPU frequency scaling framework;
  • Hardware crypto device drivers;
  • Buffer Sharing and Synchronization framework;
  • DPLL subsystem;
  • EDAC drivers;
  • Arm Firmware Framework for ARMv8-A(FFA);
  • EFI core;
  • Intel Stratix 10 firmware drivers;
  • FPGA Framework;
  • FWCTL subsystem;
  • GPIO subsystem;
  • GPU drivers;
  • HID subsystem;
  • Hardware monitoring drivers;
  • CoreSight HW tracing drivers;
  • I2C subsystem;
  • I3C subsystem;
  • IIO subsystem;
  • IIO ADC drivers;
  • InfiniBand drivers;
  • Input Device core drivers;
  • Input Device (Mouse) drivers;
  • IOMMU subsystem;
  • IRQ chip drivers;
  • Mailbox framework;
  • Multiple devices driver;
  • Media drivers;
  • NVIDIA Tegra memory controller driver;
  • Multifunction device drivers;
  • Fastrpc 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;
  • MediaTek network drivers;
  • NTB driver;
  • NVME drivers;
  • NVMEM (Non Volatile Memory) drivers;
  • Parport drivers;
  • PCI subsystem;
  • PHY drivers;
  • Pin controllers subsystem;
  • Chrome hardware platform drivers;
  • ACPI WMI driver;
  • Generic PM domains;
  • MediaTek PM domains;
  • System reset/shutdown drivers;
  • Power sequencing drivers;
  • Power supply drivers;
  • PTP clock framework;
  • Voltage and Current Regulator drivers;
  • MPAM driver;
  • Amlogic Meson reset controller drivers;
  • RPMSG subsystem;
  • S/390 drivers;
  • SCSI subsystem;
  • SLIMbus drivers;
  • NVIDIA Tegra Control Backbone (CBB) driver;
  • SPI subsystem;
  • Greybus lights staging drivers;
  • Media staging drivers;
  • Realtek RTL8723BS SDIO drivers;
  • VME bus staging drivers;
  • TCM subsystem;
  • Trusted Execution Environment drivers;
  • Thunderbolt and USB4 drivers;
  • TTY drivers;
  • Userspace I/O drivers;
  • Cadence USB3 driver;
  • USB Device Class drivers;
  • ULPI bus;
  • DesignWare USB2 driver;
  • DesignWare USB3 driver;
  • Faraday FOTG210 USB2 dual-role controller driver;
  • USB Gadget drivers;
  • USB Host Controller drivers;
  • USB ChaosKey driver;
  • Siemens ID Mouse USB driver;
  • IOWarrior USB driver;
  • LD Didactic USB driver;
  • LEGO USB Tower driver;
  • Intel USBIO USB I/O expander driver;
  • USS720 USB parallel port adapter driver;
  • MediaTek USB3 DRD driver;
  • USB Dual Role (OTG-ready) Controller drivers;
  • USB Serial 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;
  • Framebuffer layer;
  • TSM AMD SEV Guest driver;
  • Virtio drivers;
  • Xen hypervisor drivers;
  • 9P distributed file system;
  • File systems infrastructure;
  • AFS file system;
  • BTRFS file system;
  • Ceph distributed file system;
  • EROFS file system;
  • exFAT file system;
  • F2FS file system;
  • FUSE (File system in Userspace);
  • GFS2 file system;
  • HFS file system;
  • HFS+ file system;
  • HugeTLB file system;
  • Network file systems library;
  • Network file system (NFS) client;
  • Network file system (NFS) server daemon;
  • NILFS2 file system;
  • File system notification infrastructure;
  • NTFS3 file system;
  • OCFS2 file system;
  • Overlay file system;
  • Proc file system;
  • Diskquota system;
  • SMB network file system;
  • Tracing file system;
  • UDF file system;
  • XFS file system;
  • DRM TTM subsystem;
  • Key management;
  • BPF subsystem;
  • Control group (cgroup);
  • Kernel CPU control infrastructure;
  • Memory management;
  • Tracing infrastructure;
  • QorIQ DPAA2 FSL-MC bus driver;
  • Freescale ENETC Ethernet drivers;
  • Software nodes and device properties;
  • Glob pattern matching library;
  • Memory Management;
  • KVM subsystem;
  • Linked list library;
  • Mellanox drivers;
  • Netfilter;
  • padata parallel execution mechanism;
  • PPP protocol drivers and compressors;
  • Socket messages infrastructure;
  • Network traffic control;
  • Bluetooth subsystem;
  • Networking core;
  • Network shaper API;
  • Network sockets;
  • TCP network protocol;
  • XFRM subsystem;
  • io_uring subsystem;
  • IPC subsystem;
  • Audit subsystem;
  • DMA mapping infrastructure;
  • Perf events;
  • Kernel exit() syscall;
  • Kernel fork() syscall;
  • Kernel futex primitives;
  • IRQ subsystem;
  • Kexec HandOver (KHO);
  • Locking primitives;
  • Kernel module support;
  • Padata parallel execution mechanism;
  • RCU subsystem;
  • Scheduler infrastructure;
  • Signal handling mechanism;
  • Timer subsystem;
  • Cryptographic library;
  • Debug objects infrastructure;
  • Scatterlist API;
  • KProbes tracing;
  • 6LoWPAN network protocol;
  • IEEE 802 network protocols;
  • 802.1Q VLAN protocol;
  • 9P file system network protocol;
  • B.A.T.M.A.N. meshing protocol;
  • Ethernet bridge;
  • Ceph Core library;
  • Devlink API;
  • Distributed Switch Architecture;
  • Ethtool driver;
  • Handshake API;
  • HSR network protocol;
  • IEEE802154.4 network protocol;
  • IPv4 networking;
  • IPv6 networking;
  • IUCV driver;
  • L2TP protocol;
  • MAC80211 subsystem;
  • IEEE 802.15.4 subsystem;
  • Multipath TCP;
  • NetLabel subsystem;
  • NFC subsystem;
  • Open vSwitch;
  • Phonet protocol;
  • Qualcomm IPC Router (QRTR);
  • RDS protocol;
  • RxRPC session sockets;
  • SCTP protocol;
  • SMC sockets;
  • TIPC protocol;
  • TLS protocol;
  • Unix domain sockets;
  • VMware vSockets driver;
  • Wireless networking;
  • eXpress Data Path;
  • AppArmor security module;
  • Linux Security Modules (LSM) Framework;
  • Integrity Measurement Architecture(IMA) framework;
  • SELinux security module;
  • Apple Onboard Audio ALSA driver;
  • ALSA framework;
  • FireWire sound drivers;
  • HD-audio driver;
  • Gravis UltraSound ALSA driver;
  • AudioScience HPI driver;
  • C-Media CMI8x38 ALSA driver;
  • ESS Solo-1 ALSA driver;
  • ICE1712/ICE1724 (Envy24) ALSA driver;
  • Yamaha YMFPCI ALSA driver;
  • FourSemi audio codecs;
  • Texas InstrumentS Audio (ASoC/HDA) drivers;
  • Simple audio multiplexer codec driver;
  • Wolfson Microelectronics audio codecs;
  • QCOM ASoC drivers;
  • Renesas ASoC drivers;
  • SoundWire (SDCA) ASoC drivers;
  • SOF drivers;
  • STI 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
24.04 LTS noble linux-image-7.0.0-1011-gcp –  7.0.0-1011.11~24.04.1
linux-image-7.0.0-1011-gcp-64k –  7.0.0-1011.11~24.04.1
linux-image-gcp –  7.0.0-1011.11~24.04.1
linux-image-gcp-64k –  7.0.0-1011.11~24.04.1
linux-image-gcp-64k-7.0 –  7.0.0-1011.11~24.04.1
linux-image-gcp-7.0 –  7.0.0-1011.11~24.04.1

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References

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