1. Ubuntu Security Notices
  2. USN-5803-1

USN-5803-1: Linux kernel vulnerabilities

Publication date

13 January 2023

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-aws-5.15 - Linux kernel for Amazon Web Services (AWS) systems
  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-azure-5.15 - Linux kernel for Microsoft Azure cloud systems
  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-gcp-5.15 - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-hwe-5.15 - Linux hardware enablement (HWE) kernel
  • linux-ibm - Linux kernel for IBM cloud systems
  • linux-kvm - Linux kernel for cloud environments
  • linux-oracle - Linux kernel for Oracle Cloud systems
  • linux-raspi - Linux kernel for Raspberry Pi systems

Details

Kyle Zeng discovered that the sysctl implementation in the Linux kernel
contained a stack-based buffer overflow. A local attacker could use this to
cause a denial of service (system crash) or execute arbitrary code.
(CVE-2022-4378)

Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation
in the Linux kernel contained multiple use-after-free vulnerabilities. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2022-42896)

It was discovered that the Xen netback driver in the Linux kernel did not
properly handle packets structured in certain ways. An attacker in a guest
VM could possibly use this to cause a denial of service (host NIC
availability). (CVE-2022-3643)

It was discovered that an integer overflow...

Kyle Zeng discovered that the sysctl implementation in the Linux kernel
contained a stack-based buffer overflow. A local attacker could use this to
cause a denial of service (system crash) or execute arbitrary code.
(CVE-2022-4378)

Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation
in the Linux kernel contained multiple use-after-free vulnerabilities. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2022-42896)

It was discovered that the Xen netback driver in the Linux kernel did not
properly handle packets structured in certain ways. An attacker in a guest
VM could possibly use this to cause a denial of service (host NIC
availability). (CVE-2022-3643)

It was discovered that an integer overflow vulnerability existed in the
Bluetooth subsystem in the Linux kernel. A physically proximate attacker
could use this to cause a denial of service (system crash).
(CVE-2022-45934)

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
22.10 kinetic linux-image-5.19.0-1015-oracle –  5.19.0-1015.17
linux-image-virtual –  5.19.0.29.26
linux-image-5.19.0-1016-kvm –  5.19.0-1016.17
linux-image-generic-64k –  5.19.0.29.26
linux-image-generic –  5.19.0.29.26
linux-image-aws –  5.19.0.1017.14
linux-image-5.19.0-29-generic –  5.19.0-29.30
linux-image-ibm –  5.19.0.1015.12
linux-image-5.19.0-29-generic-64k –  5.19.0-29.30
linux-image-5.19.0-1015-ibm –  5.19.0-1015.16
linux-image-5.19.0-29-generic-lpae –  5.19.0-29.30
linux-image-gcp –  5.19.0.1015.12
linux-image-oem-22.04 –  5.19.0.29.26
linux-image-oracle –  5.19.0.1015.12
linux-image-5.19.0-1017-aws –  5.19.0-1017.18
linux-image-kvm –  5.19.0.1016.13
linux-image-generic-lpae –  5.19.0.29.26
linux-image-5.19.0-1015-gcp –  5.19.0-1015.16
22.04 jammy linux-image-virtual –  5.15.0.58.56
linux-image-generic-64k –  5.15.0.58.56
linux-image-generic –  5.15.0.58.56
linux-image-aws –  5.15.0.1028.26
linux-image-generic-64k-hwe-22.04 –  5.15.0.58.56
linux-image-5.15.0-1023-raspi –  5.15.0-1023.25
linux-image-ibm –  5.15.0.1023.19
linux-image-generic-hwe-22.04 –  5.15.0.58.56
linux-image-5.15.0-1031-azure –  5.15.0-1031.38
linux-image-5.15.0-1027-gcp –  5.15.0-1027.34
linux-image-aws-lts-22.04 –  5.15.0.1028.26
linux-image-5.15.0-1023-ibm –  5.15.0-1023.26
linux-image-oem-20.04 –  5.15.0.58.56
linux-image-azure-lts-22.04 –  5.15.0.1031.27
linux-image-azure –  5.15.0.1031.27
linux-image-generic-lpae-hwe-22.04 –  5.15.0.58.56
linux-image-raspi-nolpae –  5.15.0.1023.20
linux-image-5.15.0-1026-kvm –  5.15.0-1026.31
linux-image-5.15.0-1028-aws –  5.15.0-1028.32
linux-image-5.15.0-58-generic-64k –  5.15.0-58.64
linux-image-5.15.0-58-generic-lpae –  5.15.0-58.64
linux-image-gcp –  5.15.0.1027.22
linux-image-5.15.0-1027-oracle –  5.15.0-1027.33
linux-image-virtual-hwe-22.04 –  5.15.0.58.56
linux-image-oracle –  5.15.0.1027.22
linux-image-raspi –  5.15.0.1023.20
linux-image-kvm –  5.15.0.1026.22
linux-image-5.15.0-58-generic –  5.15.0-58.64
linux-image-generic-lpae –  5.15.0.58.56
linux-image-5.15.0-1023-raspi-nolpae –  5.15.0-1023.25
20.04 focal linux-image-virtual-hwe-20.04 –  5.15.0.58.64~20.04.24
linux-image-aws –  5.15.0.1028.32~20.04.17
linux-image-5.15.0-1031-azure –  5.15.0-1031.38~20.04.1
linux-image-5.15.0-1027-gcp –  5.15.0-1027.34~20.04.1
linux-image-generic-hwe-20.04 –  5.15.0.58.64~20.04.24
linux-image-azure –  5.15.0.1031.38~20.04.21
linux-image-5.15.0-1028-aws –  5.15.0-1028.32~20.04.1
linux-image-5.15.0-58-generic-64k –  5.15.0-58.64~20.04.1
linux-image-5.15.0-58-generic-lpae –  5.15.0-58.64~20.04.1
linux-image-gcp –  5.15.0.1027.34~20.04.1
linux-image-generic-lpae-hwe-20.04 –  5.15.0.58.64~20.04.24
linux-image-generic-64k-hwe-20.04 –  5.15.0.58.64~20.04.24
linux-image-5.15.0-58-generic –  5.15.0-58.64~20.04.1

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References

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