Ubuntu 20.04 LTS: USN-6681-1 Critical: Multiple Kernel Flaws
ubuntu
March 7, 2024
Several security issues were fixed in the Linux kernel.
Summary
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS (Available with Ubuntu Pro) Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-gkeop: Linux kernel for Google Container Engine (GKE) systems - linux-iot: Linux kernel for IoT platforms - linux-kvm: Linux kernel for cloud environments - linux-raspi: Linux kernel for Raspberry Pi systems - linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe-5.4: Linux hardware enablement (HWE) kernel Details: Wenqing Liu discovered that the f2fs file system implementation in the Linux kernel did not properly validate inode types while performing garbage collection. An attacker could use this to construct a malicious f2fs image that, when mounted and operated on, could cause a denial of service (system cra...
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Update Instructions
The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.4.0-1032-iot 5.4.0-1032.33 linux-image-5.4.0-1087-gkeop 5.4.0-1087.91 linux-image-5.4.0-1104-raspi 5.4.0-1104.116 linux-image-5.4.0-1108-kvm 5.4.0-1108.115 linux-image-5.4.0-1124-gcp 5.4.0-1124.133 linux-image-5.4.0-173-generic 5.4.0-173.191 linux-image-5.4.0-173-generic-lpae 5.4.0-173.191 linux-image-5.4.0-173-lowlatency 5.4.0-173.191 linux-image-gcp-lts-20.04 5.4.0.1124.126 linux-image-generic 5.4.0.173.171 linux-image-generic-lpae 5.4.0.173.171 linux-image-gkeop 5.4.0.1087.85 linux-image-gkeop-5.4 5.4.0.1087.85 linux-image-kvm 5.4.0.1108.104 linux-image-lowlatency 5.4.0.173.171 linux-image-oem 5.4.0.173.171 linux-image-oem-osp1 5.4.0.173.171 linux-image-raspi 5.4.0.1104.134 linux-image-raspi2 5.4.0.1104.134 linux-image-virtual 5.4.0.173.171 Ubuntu 18.04 LTS (Available with Ubuntu Pro): linux-image-5.4.0-1124-gcp 5.4.0-1124.133~18.04.1 linux-image-5.4.0-173-generic 5.4.0-173.191~18.04.1 linux-image-5.4.0-173-lowlatency 5.4.0-173.191~18.04.1 linux-image-gcp 5.4.0.1124.100 linux-image-generic-hwe-18.04 5.4.0.173.191~18.04.141 linux-image-lowlatency-hwe-18.04 5.4.0.173.191~18.04.141 linux-image-oem 5.4.0.173.191~18.04.141 linux-image-oem-osp1 5.4.0.173.191~18.04.141 linux-image-snapdragon-hwe-18.04 5.4.0.173.191~18.04.141 linux-image-virtual-hwe-18.04 5.4.0.173.191~18.04.141 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.
References
https://ubuntu.com/security/notices/USN-6681-1
CVE-2021-44879, CVE-2023-22995, CVE-2023-4244, CVE-2023-51779,
CVE-2023-51780, CVE-2023-51782, CVE-2023-6121, CVE-2024-0340
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Ubuntu Security Notice USN-6681-1
Package Information
https://launchpad.net/ubuntu/+source/linux/5.4.0-173.191 https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1124.133 https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1087.91 https://launchpad.net/ubuntu/+source/linux-iot/5.4.0-1032.33 https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1108.115 https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1104.116
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