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Kernel Live Patch Security Notice LSN-0085-1

Kernel Live Patch Security Notice LSN-0085-1
Posted Mar 24, 2022
Authored by Benjamin M. Romer

Yiqi Sun and Kevin Wang discovered that the cgroups implementation in the Linux kernel did not properly restrict access to the cgroups v1 release_agent feature. A local attacker could use this to gain administrative privileges. Nick Gregory discovered that the Linux kernel incorrectly handled network offload functionality. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2022-0492, CVE-2022-25636
SHA-256 | 2192c199581e31d17ad1f82ccb72319fb36da887cc27a4431990dced1f3967d7

Kernel Live Patch Security Notice LSN-0085-1

Change Mirror Download
Linux kernel vulnerabilities

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary

Several security issues were fixed in the 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-gkeop - Linux kernel for Google Container Engine (GKE) systems
- linux-ibm - Linux kernel for IBM cloud systems
- linux-oem - Linux kernel for OEM systems

Details

Yiqi Sun and Kevin Wang discovered that the cgroups implementation in
the Linux kernel did not properly restrict access to the cgroups v1
release_agent feature. A local attacker could use this to gain
administrative privileges. (CVE-2022-0492)

Nick Gregory discovered that the Linux kernel incorrectly handled
network offload functionality. A local attacker could use this to cause
a denial of service or possibly execute arbitrary code. (CVE-2022-25636)

Update instructions

The problem can be corrected by updating your kernel livepatch to the
following versions:

Ubuntu 20.04 LTS
aws - 85.1
azure - 85.1
gcp - 85.1
generic - 85.1
gke - 85.1
gkeop - 85.1
ibm - 85.1
lowlatency - 85.1

Ubuntu 18.04 LTS
aws - 85.1
azure - 85.1
generic - 85.1
generic - 85.2
gke - 85.1
gkeop - 85.1
ibm - 85.1
lowlatency - 85.1
lowlatency - 85.2
oem - 85.1

Ubuntu 16.04 ESM
aws - 85.1
azure - 85.1
generic - 85.1
lowlatency - 85.1

Ubuntu 14.04 ESM
generic - 85.1
lowlatency - 85.1

Support Information

Kernels older than the levels listed below do not receive livepatch
updates. If you are running a kernel version earlier than the one listed
below, please upgrade your kernel as soon as possible.

Ubuntu 20.04 LTS
linux-aws - 5.4.0-1009
linux-azure - 5.4.0-1010
linux-gcp - 5.4.0-1009
linux-gke - 5.4.0-1033
linux-gkeop - 5.4.0-1009
linux-ibm - 5.4.0-1009
linux-oem - 5.4.0-26
linux - 5.4.0-26

Ubuntu 18.04 LTS
linux-aws - 4.15.0-1054
linux-azure-4.15 - 4.15.0-1115
linux-azure-5.4 - 5.4.0-1069
linux-gke-4.15 - 4.15.0-1076
linux-gke-5.4 - 5.4.0-1009
linux-gkeop-5.4 - 5.4.0-1007
linux-hwe-5.4 - 5.4.0-26
linux-ibm-5.4 - 5.4.0-1009
linux-oem - 4.15.0-1063
linux - 4.15.0-69

Ubuntu 16.04 ESM
linux-aws - 4.4.0-1098
linux-azure - 4.15.0-1063
linux-hwe - 4.15.0-69
linux - 4.4.0-168

Ubuntu 14.04 ESM
linux-lts-xenial - 4.4.0-168

References

- CVE-2022-0492
- CVE-2022-25636




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