USN-7652-1: Linux kernel (Real-time) vulnerabilities

USN-7652-1: Linux kernel (Real-time) vulnerabilities

Publication date: 17 July 2025
Overview: Several security issues were fixed in the Linux kernel.

Packages
linux-realtime - Linux kernel for Real-time systems

Details
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:

• PowerPC architecture;
• S390 architecture;
• Block layer subsystem;
• Serial ATA and Parallel ATA drivers;
• Drivers core;
• Network block device driver;
• Character device driver;
• TPM device driver;
• Clock framework and drivers;
• FireWire subsystem;
• GPU drivers;
• HID subsystem;
• I3C subsystem;
• InfiniBand drivers;
• IOMMU subsystem;
• Media drivers;
• NVIDIA Tegra memory controller driver;
• Fastrpc Driver;
• Network drivers;
• Operating Performance Points (OPP) driver;
• PCI subsystem;
• x86 platform drivers;
• PPS (Pulse Per Second) driver;
• PTP clock framework;
• Remote Processor subsystem;
• Real Time Clock drivers;
• SCSI subsystem;
• QCOM SoC drivers;
• Media staging drivers;
• TTY drivers;
• UFS subsystem;
• USB Gadget drivers;
• USB Host Controller drivers;
• File systems infrastructure;
• BTRFS file system;
• F2FS file system;
• NILFS2 file system;
• SMB network file system;
• UBI file system;
• Timer subsystem;
• KVM subsystem;
• Networking core;
• ptr_ring data structure definitions;
• Networking subsytem;
• Amateur Radio drivers;
• XFRM subsystem;
• Tracing infrastructure;
• BPF subsystem;
• Padata parallel execution mechanism;
• printk logging mechanism;
• Memory management;
• Bluetooth subsystem;
• IPv4 networking;
• IPv6 networking;
• MAC80211 subsystem;
• Multipath TCP;
• Netfilter;
• NFC subsystem;
• Rose network layer;
• RxRPC session sockets;
• Network traffic control;
• Landlock security;
• Linux Security Modules (LSM) Framework;
• Tomoyo security module;
• SoC audio core drivers

Update instructions
The problem can be corrected by updating your system to the following package versions:
24.04 noble

• linux-image-6.8.1-1025-realtime – 6.8.1-1025.26
• linux-image-realtime – 6.8.1-1025.26
• linux-image-realtime-6.8.1 – 6.8.1-1025.26