USN-4727-1

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Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-4727-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4727-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-4727-1
Upstream
Related
Published
2021-02-10T00:54:45.517909Z
Modified
2025-10-13T04:35:20Z
Summary
linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oem-5.6, linux-oracle, linux-raspi vulnerability
Details

Alexander Popov discovered that multiple race conditions existed in the AF_VSOCK implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code.

References

Affected packages

Ubuntu:20.04:LTS / linux-hwe-5.8

Package

Name
linux-hwe-5.8
Purl
pkg:deb/ubuntu/linux-hwe-5.8@5.8.0-43.49~20.04.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.8.0-43.49~20.04.1

Affected versions

5.*

5.8.0-23.24~20.04.1
5.8.0-25.26~20.04.1
5.8.0-28.30~20.04.1
5.8.0-29.31~20.04.1
5.8.0-31.33~20.04.1
5.8.0-33.36~20.04.1
5.8.0-34.37~20.04.2
5.8.0-36.40~20.04.1
5.8.0-38.43~20.04.1
5.8.0-40.45~20.04.1
5.8.0-41.46~20.04.1

Ecosystem specific 

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Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2021-26708",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:20.04:LTS"
}

Ubuntu:20.04:LTS / linux-oem-5.6

Package

Name
linux-oem-5.6
Purl
pkg:deb/ubuntu/linux-oem-5.6@5.6.0-1047.51?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.6.0-1047.51

Affected versions

5.*

5.6.0-1007.7
5.6.0-1008.8
5.6.0-1010.10
5.6.0-1011.11
5.6.0-1013.13
5.6.0-1017.17
5.6.0-1018.18
5.6.0-1020.20
5.6.0-1021.21
5.6.0-1023.23
5.6.0-1026.26
5.6.0-1027.27
5.6.0-1028.28
5.6.0-1031.32
5.6.0-1032.33
5.6.0-1033.35
5.6.0-1034.36
5.6.0-1035.37
5.6.0-1036.39
5.6.0-1039.43
5.6.0-1042.46

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "linux-buildinfo-5.6.0-1047-oem",
            "binary_version": "5.6.0-1047.51"
        },
        {
            "binary_name": "linux-headers-5.6.0-1047-oem",
            "binary_version": "5.6.0-1047.51"
        },
        {
            "binary_name": "linux-image-unsigned-5.6.0-1047-oem",
            "binary_version": "5.6.0-1047.51"
        },
        {
            "binary_name": "linux-modules-5.6.0-1047-oem",
            "binary_version": "5.6.0-1047.51"
        },
        {
            "binary_name": "linux-oem-5.6-headers-5.6.0-1047",
            "binary_version": "5.6.0-1047.51"
        },
        {
            "binary_name": "linux-oem-5.6-tools-5.6.0-1047",
            "binary_version": "5.6.0-1047.51"
        },
        {
            "binary_name": "linux-oem-5.6-tools-host",
            "binary_version": "5.6.0-1047.51"
        },
        {
            "binary_name": "linux-tools-5.6.0-1047-oem",
            "binary_version": "5.6.0-1047.51"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2021-26708",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:20.04:LTS"
}