Ubuntu 20.04 LTS: 0091-1 Critical Use-After-Free Kernel Flaws

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

Ubuntu 20.04 LTS
    aws - 91.1
    azure - 91.1
    gcp - 91.1
    generic - 91.1
    gke - 91.1
    gkeop - 91.1
    ibm - 91.1
    lowlatency - 91.1

Ubuntu 18.04 LTS
    aws - 91.1
    azure - 91.1
    gcp - 91.1
    generic - 91.1
    gke - 91.1
    gkeop - 91.1
    ibm - 91.1
    lowlatency - 91.1

Ubuntu 22.04 LTS
    aws - 91.1
    azure - 91.1
    gcp - 91.1
    generic - 91.1
    gke - 91.1
    ibm - 91.1

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-5.15 - 5.15.0-1000
    linux-aws - 5.4.0-1009
    linux-aws - 5.4.0-1061
    linux-azure-5.15 - 5.15.0-1069
    linux-azure - 5.4.0-1010
    linux-gcp-5.15 - 5.15.0-1000
    linux-gcp - 5.4.0-1009
    linux-gke-5.15 - 5.15.0-1000
    linux-gke - 5.4.0-1033
    linux-gkeop - 5.4.0-1009
    linux-hwe - 5.15.0-0
    linux-ibm-5.15 - 5.15.0-1000
    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-aws - 4.15.0-1119
    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-aws - 4.4.0-1129
    linux-azure - 4.15.0-1063
    linux-azure - 4.15.0-1078
    linux-azure - 4.15.0-1114
    linux-gcp - 4.15.0-1118
    linux-hwe - 4.15.0-143
    linux-hwe - 4.15.0-69
    linux - 4.4.0-168
    linux - 4.4.0-211

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
    linux - 5.15.0-25

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

References

-   CVE-2022-41222
-   CVE-2022-42719
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