1. Ubuntu Security Notices
  2. USN-5384-1

USN-5384-1: Linux kernel vulnerabilities

Publication date

20 April 2022

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

It was discovered that the UDF file system implementation in the Linux
kernel could attempt to dereference a null pointer in some situations. An
attacker could use this to construct a malicious UDF image that, when
mounted and operated on, could cause a denial of service (system crash).
(CVE-2022-0617)

Lyu Tao discovered that the NFS implementation in the Linux kernel did not
properly handle requests to open a directory on a regular file. A local
attacker could use this to expose sensitive information (kernel memory).
(CVE-2022-24448)

It was discovered that the YAM AX.25 device driver in the Linux kernel did
not properly deallocate memory in some error conditions. A local privileged
attacker could use this to cause a denial of service (kernel memory
exhaustion). (CVE-2022-24959)

It was discovered that the UDF file system implementation in the Linux
kernel could attempt to dereference a null pointer in some situations. An
attacker could use this to construct a malicious UDF image that, when
mounted and operated on, could cause a denial of service (system crash).
(CVE-2022-0617)

Lyu Tao discovered that the NFS implementation in the Linux kernel did not
properly handle requests to open a directory on a regular file. A local
attacker could use this to expose sensitive information (kernel memory).
(CVE-2022-24448)

It was discovered that the YAM AX.25 device driver in the Linux kernel did
not properly deallocate memory in some error conditions. A local privileged
attacker could use this to cause a denial of service (kernel memory
exhaustion). (CVE-2022-24959)

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
20.04 focal linux-image-5.4.0-1062-kvm –  5.4.0-1062.65
linux-image-5.4.0-109-generic-lpae –  5.4.0-109.123
linux-image-gkeop –  5.4.0.1039.42
linux-image-virtual –  5.4.0.109.113
linux-image-generic –  5.4.0.109.113
linux-image-oem –  5.4.0.109.113
linux-image-5.4.0-1059-raspi –  5.4.0-1059.67
linux-image-oem-osp1 –  5.4.0.109.113
linux-image-5.4.0-1068-gke –  5.4.0-1068.71
linux-image-ibm-lts-20.04 –  5.4.0.1020.20
linux-image-azure-lts-20.04 –  5.4.0.1077.75
linux-image-gkeop-5.4 –  5.4.0.1039.42
linux-image-azure-fde –  5.4.0.1076.79+cvm1.21
linux-image-5.4.0-1077-azure –  5.4.0-1077.80
linux-image-gke –  5.4.0.1068.78
linux-image-ibm –  5.4.0.1020.20
linux-image-5.4.0-1076-azure-fde –  5.4.0-1076.79+cvm1.1
linux-image-aws-lts-20.04 –  5.4.0.1072.74
linux-image-5.4.0-1070-oracle –  5.4.0-1070.76
linux-image-5.4.0-1020-ibm –  5.4.0-1020.22
linux-image-raspi2 –  5.4.0.1059.93
linux-image-5.4.0-109-lowlatency –  5.4.0-109.123
linux-image-gcp-lts-20.04 –  5.4.0.1072.80
linux-image-5.4.0-1072-gcp –  5.4.0-1072.77
linux-image-5.4.0-1039-gkeop –  5.4.0-1039.40
linux-image-5.4.0-109-generic –  5.4.0-109.123
linux-image-raspi –  5.4.0.1059.93
linux-image-gke-5.4 –  5.4.0.1068.78
linux-image-kvm –  5.4.0.1062.61
linux-image-oracle-lts-20.04 –  5.4.0.1070.70
linux-image-generic-lpae –  5.4.0.109.113
linux-image-5.4.0-1072-aws –  5.4.0-1072.77
linux-image-lowlatency –  5.4.0.109.113
18.04 bionic linux-image-5.4.0-109-generic-lpae –  5.4.0-109.123~18.04.1
linux-image-generic-hwe-18.04 –  5.4.0.109.123~18.04.94
linux-image-snapdragon-hwe-18.04 –  5.4.0.109.123~18.04.94
linux-image-oem –  5.4.0.109.123~18.04.94
linux-image-aws –  5.4.0.1072.54
linux-image-5.4.0-109-generic –  5.4.0-109.123~18.04.1
linux-image-raspi-hwe-18.04 –  5.4.0.1059.60
linux-image-5.4.0-1072-gcp –  5.4.0-1072.77~18.04.1
linux-image-5.4.0-1059-raspi –  5.4.0-1059.66~18.04.1
linux-image-5.4.0-1072-aws –  5.4.0-1072.77~18.04.1
linux-image-generic-lpae-hwe-18.04 –  5.4.0.109.123~18.04.94
linux-image-5.4.0-1068-gke –  5.4.0-1068.71~18.04.1
linux-image-gkeop-5.4 –  5.4.0.1039.40~18.04.39
linux-image-azure –  5.4.0.1077.56
linux-image-5.4.0-1020-ibm –  5.4.0-1020.22~18.04.1
linux-image-5.4.0-1077-azure –  5.4.0-1077.80~18.04.1
linux-image-5.4.0-1039-gkeop –  5.4.0-1039.40~18.04.1
linux-image-ibm –  5.4.0.1020.37
linux-image-virtual-hwe-18.04 –  5.4.0.109.123~18.04.94
linux-image-5.4.0-1070-oracle –  5.4.0-1070.76~18.04.1
linux-image-5.4.0-109-lowlatency –  5.4.0-109.123~18.04.1
linux-image-gcp –  5.4.0.1072.56
linux-image-oem-osp1 –  5.4.0.109.123~18.04.94
linux-image-oracle –  5.4.0.1070.76~18.04.49
linux-image-lowlatency-hwe-18.04 –  5.4.0.109.123~18.04.94
linux-image-gke-5.4 –  5.4.0.1068.71~18.04.32

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References

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