[LSN-0087-1] Linux kernel vulnerability

[benjamin.romer at canonical.com]

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 22.04 LTS
-   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

Aaron Adams discovered that the netfilter subsystem in the Linux kernel
did not properly handle the removal of stateful expressions 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 execute
arbitrary code. (CVE-2022-1966)

Ziming Zhang discovered that the netfilter subsystem in the Linux kernel
did not properly validate sets with multiple ranged fields. A local
attacker could use this to cause a denial of service or execute
arbitrary code. (CVE-2022-1972)

Update instructions

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

Ubuntu 20.04 LTS
    aws - 87.1
    azure - 87.1
    gcp - 87.1
    generic - 87.1
    gke - 87.1
    gkeop - 87.1
    ibm - 87.1
    lowlatency - 87.1

Ubuntu 18.04 LTS
    aws - 87.1
    aws - 87.2
    azure - 87.1
    gcp - 87.1
    generic - 87.1
    gke - 87.1
    gkeop - 87.1
    lowlatency - 87.1
    oem - 87.1

Ubuntu 16.04 ESM
    aws - 87.1
    azure - 87.1
    gcp - 87.1
    generic - 87.1
    lowlatency - 87.1

Ubuntu 22.04 LTS
    gcp - 87.1
    generic - 87.1
    gke - 87.1
    ibm - 87.1
    lowlatency - 87.1

Ubuntu 14.04 ESM
    generic - 87.1
    lowlatency - 87.1

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-5.4 - 5.4.0-1069
    linux-aws - 4.15.0-1054
    linux-azure-4.15 - 4.15.0-1115
    linux-azure-5.4 - 5.4.0-1069
    linux-gcp-4.15 - 4.15.0-1121
    linux-gcp-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-hwe - 4.15.0-1126
    linux-aws - 4.4.0-1098
    linux-azure - 4.15.0-1063
    linux-gcp - 4.15.0-1118
    linux-hwe - 4.15.0-69
    linux - 4.4.0-168

Ubuntu 22.04 LTS
    linux-aws - 5.15.0-1000
    linux-azure - 5.15.0-1000
    linux-gcp - 5.15.0-1000
    linux-gke - 5.15.0-1000
    linux-ibm - 5.15.0-1000
    linux - 5.15.0-24

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

References

-   CVE-2022-1966
-   CVE-2022-1972