[USN-5518-1] Linux kernel vulnerabilities

Thu Jul 14 01:39:33 UTC 2022

==========================================================================
Ubuntu Security Notice USN-5518-1
July 14, 2022

linux, linux-aws, linux-azure, linux-gcp, linux-gke, linux-ibm, linux-kvm,
linux-lowlatency, linux-oracle vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud 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-kvm: Linux kernel for cloud environments
- linux-lowlatency: Linux low latency kernel
- linux-oracle: Linux kernel for Oracle Cloud systems

Details:

It was discovered that the eBPF implementation in the Linux kernel did not
properly prevent writes to kernel objects in BPF_BTF_LOAD commands. A
privileged local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2022-0500)

It was discovered that the Marvell NFC device driver implementation in the
Linux kernel did not properly perform memory cleanup operations in some
situations, leading to a use-after-free vulnerability. A local attacker
could possibly use this to cause a denial of service (system) or execute
arbitrary code. (CVE-2022-1734)

Yongkang Jia discovered that the KVM hypervisor implementation in the Linux
kernel did not properly handle guest TLB mapping invalidation requests in
some situations. An attacker in a guest VM could use this to cause a denial
of service in the host OS (system crash). (CVE-2022-1789)

Duoming Zhou discovered a race condition in the NFC subsystem in the Linux
kernel, leading to a use-after-free vulnerability. A privileged local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2022-1974)

Duoming Zhou discovered that the NFC subsystem in the Linux kernel did not
properly prevent context switches from occurring during certain atomic
context operations. A privileged local attacker could use this to cause a
denial of service (system crash). (CVE-2022-1975)

Minh Yuan discovered that the floppy driver in the Linux kernel contained a
race condition in some situations, leading to 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-2022-33981)

Update instructions:

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

Ubuntu 22.04 LTS:
  linux-image-5.15.0-1010-ibm     5.15.0-1010.12
  linux-image-5.15.0-1011-gke     5.15.0-1011.14
  linux-image-5.15.0-1013-gcp     5.15.0-1013.18
  linux-image-5.15.0-1013-kvm     5.15.0-1013.16
  linux-image-5.15.0-1013-oracle  5.15.0-1013.17
  linux-image-5.15.0-1014-azure   5.15.0-1014.17
  linux-image-5.15.0-1015-aws     5.15.0-1015.19
  linux-image-5.15.0-41-generic   5.15.0-41.44
  linux-image-5.15.0-41-generic-64k  5.15.0-41.44
  linux-image-5.15.0-41-generic-lpae  5.15.0-41.44
  linux-image-5.15.0-41-lowlatency  5.15.0-41.44
  linux-image-5.15.0-41-lowlatency-64k  5.15.0-41.44
  linux-image-aws                 5.15.0.1015.15
  linux-image-azure               5.15.0.1014.13
  linux-image-gcp                 5.15.0.1013.11
  linux-image-generic             5.15.0.41.43
  linux-image-generic-64k         5.15.0.41.43
  linux-image-generic-64k-hwe-22.04  5.15.0.41.43
  linux-image-generic-hwe-22.04   5.15.0.41.43
  linux-image-generic-lpae        5.15.0.41.43
  linux-image-generic-lpae-hwe-22.04  5.15.0.41.43
  linux-image-gke                 5.15.0.1011.14
  linux-image-gke-5.15            5.15.0.1011.14
  linux-image-ibm                 5.15.0.1010.9
  linux-image-kvm                 5.15.0.1013.11
  linux-image-lowlatency          5.15.0.41.40
  linux-image-lowlatency-64k      5.15.0.41.40
  linux-image-lowlatency-64k-hwe-22.04  5.15.0.41.40
  linux-image-lowlatency-hwe-22.04  5.15.0.41.40
  linux-image-oem-20.04           5.15.0.41.43
  linux-image-oracle              5.15.0.1013.11
  linux-image-virtual             5.15.0.41.43
  linux-image-virtual-hwe-22.04   5.15.0.41.43

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-5518-1
  CVE-2022-0500, CVE-2022-1734, CVE-2022-1789, CVE-2022-1974,
  CVE-2022-1975, CVE-2022-33981

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.15.0-41.44
  https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1015.19
  https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1014.17
  https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1013.18
  https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1011.14
  https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1010.12
  https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1013.16
  https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-41.44
  https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1013.17

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