USN-6999-1: Linux kernel vulnerabilities

USN-6999-1: Linux kernel vulnerabilities
11 September 2024

Several security issues were fixed in the Linux kernel.

Releases
Ubuntu 24.04 LTS

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-lowlatency - Linux low latency kernel
• linux-oem-6.8 - Linux kernel for OEM systems
• linux-oracle - Linux kernel for Oracle Cloud systems

Details
Chenyuan Yang discovered that the CEC driver driver in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2024-23848)

It was discovered that the JFS file system contained an out-of-bounds read vulnerability when printing xattr debug information. A local attacker could use this to cause a denial of service (system crash). (CVE-2024-40902)
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;
• MIPS architecture;
• PA-RISC architecture;
• PowerPC architecture;
• RISC-V architecture;
• x86 architecture;
• Block layer subsystem;
• ACPI drivers;
• Drivers core;
• Null block device driver;
• Character device driver;
• TPM device driver;
• Clock framework and drivers;
• CPU frequency scaling framework;
• Hardware crypto device drivers;
• CXL (Compute Express Link) drivers;
• Buffer Sharing and Synchronization framework;
• DMA engine subsystem;
• EFI core;
• FPGA Framework;
• GPU drivers;
• Greybus drivers;
• HID subsystem;
• HW tracing;
• I2C subsystem;
• IIO subsystem;
• InfiniBand drivers;
• Input Device (Mouse) drivers;
• Mailbox framework;
• Media drivers;
• Microchip PCI driver;
• VMware VMCI Driver;
• Network drivers;
• PCI subsystem;
• x86 platform drivers;
• PTP clock framework;
• S/390 drivers;
• SCSI drivers;
• SoundWire subsystem;
• Sonic Silicon Backplane drivers;
• Greybus lights staging drivers;
• Thermal drivers;
• TTY drivers;
• USB subsystem;
• VFIO drivers;
• Framebuffer layer;
• Watchdog drivers;
• 9P distributed file system;
• BTRFS file system;
• File systems infrastructure;
• Ext4 file system;
• F2FS file system;
• JFS file system;
• Network file system server daemon;
• NILFS2 file system;
• NTFS3 file system;
• SMB network file system;
• Tracing file system;
• Tracing infrastructure;
• io_uring subsystem;
• Core kernel;
• BPF subsystem;
• Kernel debugger infrastructure;
• DMA mapping infrastructure;
• IRQ subsystem;
• Memory management;
• 9P file system network protocol;
• Amateur Radio drivers;
• B.A.T.M.A.N. meshing protocol;
• Ethernet bridge;
• Networking core;
• Ethtool driver;
• IPv4 networking;
• IPv6 networking;
• MAC80211 subsystem;
• Multipath TCP;
• Netfilter;
• NET/ROM layer;
• NFC subsystem;
• Network traffic control;
• Sun RPC protocol;
• TIPC protocol;
• TLS protocol;
• Unix domain sockets;
• Wireless networking;
• XFRM subsystem;
• AppArmor security module;
• Integrity Measurement Architecture(IMA) framework;
• Landlock security;
• Linux Security Modules (LSM) Framework;
• SELinux security module;
• Simplified Mandatory Access Control Kernel framework;
• ALSA framework;
• HD-audio driver;
• SOF drivers;

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

Ubuntu 24.04

• linux-image-6.8.0-1010-gke - 6.8.0-1010.13
• linux-image-6.8.0-1012-ibm - 6.8.0-1012.12
• linux-image-6.8.0-1012-oem - 6.8.0-1012.12
• linux-image-6.8.0-1012-oracle - 6.8.0-1012.12
• linux-image-6.8.0-1012-oracle-64k - 6.8.0-1012.12
• linux-image-6.8.0-1014-gcp - 6.8.0-1014.16
• linux-image-6.8.0-1015-aws - 6.8.0-1015.16
• linux-image-6.8.0-44-generic - 6.8.0-44.44
• linux-image-6.8.0-44-generic-64k - 6.8.0-44.44
• linux-image-6.8.0-44-lowlatency - 6.8.0-44.44.1
• linux-image-6.8.0-44-lowlatency-64k - 6.8.0-44.44.1
• linux-image-aws - 6.8.0-1015.16
• linux-image-gcp - 6.8.0-1014.16
• linux-image-generic - 6.8.0-44.44
• linux-image-generic-64k - 6.8.0-44.44
• linux-image-generic-64k-hwe-24.04 - 6.8.0-44.44
• linux-image-generic-hwe-24.04 - 6.8.0-44.44
• linux-image-generic-lpae - 6.8.0-44.44
• linux-image-gke - 6.8.0-1010.13
• linux-image-ibm - 6.8.0-1012.12
• linux-image-ibm-classic - 6.8.0-1012.12
• linux-image-ibm-lts-24.04 - 6.8.0-1012.12
• linux-image-kvm - 6.8.0-44.44
• linux-image-lowlatency - 6.8.0-44.44.1
• linux-image-lowlatency-64k - 6.8.0-44.44.1
• linux-image-oracle - 6.8.0-1012.12
• linux-image-oracle-64k - 6.8.0-1012.12
• linux-image-virtual - 6.8.0-44.44
• linux-image-virtual-hwe-24.04 - 6.8.0-44.44

After a standard system update you need to reboot your computer to make all the necessary changes.

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.