USN-5091-3

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Source

https://ubuntu.com/security/notices/USN-5091-3

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5091-3.json

JSON Data

https://api.osv.dev/v1/vulns/USN-5091-3

Published

2021-10-15T00:11:45Z

Modified

2026-02-10T04:42:19Z

Summary

linux-azure, linux-azure-5.4 regression

Details

USN-5091-1 fixed vulnerabilities in Linux 5.4-based kernels. Unfortunately, for Linux kernels intended for use within Microsoft Azure environments, that update introduced a regression that could cause the kernel to fail to boot in large Azure instance types. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack. An attacker could use this to expose sensitive information. (CVE-2021-33624)

It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679)

Alexey Kardashevskiy discovered that the KVM implementation for PowerPC systems in the Linux kernel did not properly validate RTAS arguments in some situations. An attacker in a guest vm could use this to cause a denial of service (host OS crash) or possibly execute arbitrary code. (CVE-2021-37576)

It was discovered that the Virtio console implementation in the Linux kernel did not properly validate input lengths in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-38160)

Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly order connection setup operations. An attacker controlling a remote NFS server could use this to cause a denial of service on the client. (CVE-2021-38199)

It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle device removal events. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2021-38204)

References

Affected packages

Ubuntu:18.04:LTS / linux-azure-5.4

Package

Name: linux-azure-5.4
Purl: pkg:deb/ubuntu/linux-azure-5.4@5.4.0-1061.64~18.04.1?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.4.0-1061.64~18.04.1

Affected versions

5.*

5.4.0-1020.20~18.04.1

5.4.0-1022.22~18.04.1

5.4.0-1023.23~18.04.1

5.4.0-1025.25~18.04.1

5.4.0-1026.26~18.04.1

5.4.0-1031.32~18.04.1

5.4.0-1032.33~18.04.1

5.4.0-1034.35~18.04.1

5.4.0-1035.36~18.04.1

5.4.0-1036.38~18.04.1

5.4.0-1039.41~18.04.1

5.4.0-1040.42~18.04.1

5.4.0-1041.43~18.04.1

5.4.0-1043.45~18.04.1

5.4.0-1044.46~18.04.1

5.4.0-1046.48~18.04.1

5.4.0-1047.49~18.04.1

5.4.0-1048.50~18.04.1

5.4.0-1049.51~18.04.1

5.4.0-1051.53~18.04.1

5.4.0-1055.57~18.04.1

5.4.0-1056.58~18.04.1

5.4.0-1058.60~18.04.1

5.4.0-1059.62~18.04.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "linux-azure-5.4-cloud-tools-5.4.0-1061",
            "binary_version": "5.4.0-1061.64~18.04.1"
        },
        {
            "binary_name": "linux-azure-5.4-headers-5.4.0-1061",
            "binary_version": "5.4.0-1061.64~18.04.1"
        },
        {
            "binary_name": "linux-azure-5.4-tools-5.4.0-1061",
            "binary_version": "5.4.0-1061.64~18.04.1"
        },
        {
            "binary_name": "linux-buildinfo-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64~18.04.1"
        },
        {
            "binary_name": "linux-cloud-tools-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64~18.04.1"
        },
        {
            "binary_name": "linux-headers-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64~18.04.1"
        },
        {
            "binary_name": "linux-image-unsigned-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64~18.04.1"
        },
        {
            "binary_name": "linux-modules-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64~18.04.1"
        },
        {
            "binary_name": "linux-modules-extra-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64~18.04.1"
        },
        {
            "binary_name": "linux-tools-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64~18.04.1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "cves": [],
    "ecosystem": "Ubuntu:18.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5091-3.json"

Ubuntu:20.04:LTS / linux-azure

Package

Name: linux-azure
Purl: pkg:deb/ubuntu/linux-azure@5.4.0-1061.64?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.4.0-1061.64

Affected versions

5.*

5.3.0-1003.3

5.3.0-1008.9

5.3.0-1009.10

5.4.0-1006.6

5.4.0-1008.8

5.4.0-1009.9

5.4.0-1010.10

5.4.0-1012.12

5.4.0-1016.16

5.4.0-1019.19

5.4.0-1020.20

5.4.0-1022.22

5.4.0-1023.23

5.4.0-1025.25

5.4.0-1026.26

5.4.0-1031.32

5.4.0-1032.33

5.4.0-1034.35

5.4.0-1035.36

5.4.0-1036.38

5.4.0-1039.41

5.4.0-1040.42

5.4.0-1041.43

5.4.0-1043.45

5.4.0-1044.46

5.4.0-1046.48

5.4.0-1047.49

5.4.0-1048.50

5.4.0-1049.51

5.4.0-1051.53

5.4.0-1055.57

5.4.0-1056.58

5.4.0-1058.60

5.4.0-1059.62

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "linux-azure-cloud-tools-5.4.0-1061",
            "binary_version": "5.4.0-1061.64"
        },
        {
            "binary_name": "linux-azure-headers-5.4.0-1061",
            "binary_version": "5.4.0-1061.64"
        },
        {
            "binary_name": "linux-azure-tools-5.4.0-1061",
            "binary_version": "5.4.0-1061.64"
        },
        {
            "binary_name": "linux-buildinfo-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64"
        },
        {
            "binary_name": "linux-cloud-tools-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64"
        },
        {
            "binary_name": "linux-headers-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64"
        },
        {
            "binary_name": "linux-image-unsigned-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64"
        },
        {
            "binary_name": "linux-modules-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64"
        },
        {
            "binary_name": "linux-modules-extra-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64"
        },
        {
            "binary_name": "linux-tools-5.4.0-1061-azure",
            "binary_version": "5.4.0-1061.64"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "cves": [],
    "ecosystem": "Ubuntu:20.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5091-3.json"