UBUNTU-CVE-2021-20226

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Source

https://ubuntu.com/security/CVE-2021-20226

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20226.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-20226

Upstream

CVE-2021-20226

Published

2021-02-23T17:15:00Z

Modified

2025-07-18T16:46:36Z

Severity

7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

A use-after-free flaw was found in the io_uring in Linux kernel, where a local attacker with a user privilege could cause a denial of service problem on the system The issue results from the lack of validating the existence of an object prior to performing operations on the object by not incrementing the file reference counter while in use. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.

References

Affected packages

Ubuntu:Pro:16.04:LTS / linux-hwe-edge

Package

Name: linux-hwe-edge
Purl: pkg:deb/ubuntu/linux-hwe-edge@4.15.0-23.25~16.04.1?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.8.0-28.30~16.04.1

4.8.0-30.32~16.04.1

4.8.0-32.34~16.04.1

4.8.0-34.36~16.04.1

4.10.0-14.16~16.04.1

4.10.0-19.21~16.04.1

4.10.0-20.22~16.04.1

4.10.0-21.23~16.04.1

4.10.0-22.24~16.04.1

4.10.0-24.28~16.04.1

4.10.0-26.30~16.04.1

4.11.0-13.19~16.04.1

4.11.0-14.20~16.04.1

4.13.0-16.19~16.04.3

4.13.0-17.20~16.04.1

4.13.0-19.22~16.04.1

4.13.0-21.24~16.04.1

4.13.0-25.29~16.04.2

4.15.0-13.14~16.04.1

4.15.0-15.16~16.04.1

4.15.0-20.21~16.04.1

4.15.0-22.24~16.04.1

4.15.0-23.25~16.04.1

Ubuntu:Pro:18.04:LTS / linux-aws-5.0

Package

Name: linux-aws-5.0
Purl: pkg:deb/ubuntu/linux-aws-5.0@5.0.0-1027.30?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.0.0-1021.24~18.04.1

5.0.0-1022.25~18.04.1

5.0.0-1023.26~18.04.1

5.0.0-1024.27~18.04.1

5.0.0-1025.28

5.0.0-1027.30

Ubuntu:Pro:18.04:LTS / linux-aws-5.3

Package

Name: linux-aws-5.3
Purl: pkg:deb/ubuntu/linux-aws-5.3@5.3.0-1035.37?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.3.0-1016.17~18.04.1

5.3.0-1017.18~18.04.1

5.3.0-1019.21~18.04.1

5.3.0-1023.25~18.04.1

5.3.0-1028.30~18.04.1

5.3.0-1030.32~18.04.1

5.3.0-1032.34~18.04.2

5.3.0-1033.35

5.3.0-1034.36

5.3.0-1035.37

Ubuntu:Pro:18.04:LTS / linux-azure

Package

Name: linux-azure
Purl: pkg:deb/ubuntu/linux-azure@5.0.0-1036.38?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.15.0-1002.2

4.15.0-1003.3

4.15.0-1004.4

4.15.0-1008.8

4.15.0-1009.9

4.15.0-1012.12

4.15.0-1013.13

4.15.0-1014.14

4.15.0-1018.18

4.15.0-1019.19

4.15.0-1021.21

4.15.0-1022.23

4.15.0-1023.24

4.15.0-1025.26

4.15.0-1028.29

4.15.0-1030.31

4.15.0-1031.32

4.15.0-1032.33

4.15.0-1035.36

4.15.0-1036.38

4.15.0-1037.39

4.18.0-1011.11~18.04.1

4.18.0-1013.13~18.04.1

4.18.0-1014.14~18.04.1

4.18.0-1018.18~18.04.1

4.18.0-1019.19~18.04.1

4.18.0-1020.20~18.04.1

4.18.0-1023.24~18.04.1

4.18.0-1024.25~18.04.1

4.18.0-1025.27~18.04.1

5.*

5.0.0-1014.14~18.04.1

5.0.0-1016.17~18.04.1

5.0.0-1018.19~18.04.1

5.0.0-1020.21~18.04.1

5.0.0-1022.23~18.04.1

5.0.0-1023.24~18.04.1

5.0.0-1025.27~18.04.1

5.0.0-1027.29~18.04.1

5.0.0-1028.30~18.04.1

5.0.0-1029.31~18.04.1

5.0.0-1031.33

5.0.0-1032.34

5.0.0-1035.37

5.0.0-1036.38

Ubuntu:Pro:18.04:LTS / linux-azure-5.3

Package

Name: linux-azure-5.3
Purl: pkg:deb/ubuntu/linux-azure-5.3@5.3.0-1035.36?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.3.0-1007.8~18.04.1

5.3.0-1008.9~18.04.1

5.3.0-1009.10~18.04.1

5.3.0-1010.11~18.04.1

5.3.0-1012.13~18.04.1

5.3.0-1013.14~18.04.1

5.3.0-1016.17~18.04.1

5.3.0-1018.19~18.04.1

5.3.0-1019.20~18.04.1

5.3.0-1020.21~18.04.1

5.3.0-1022.23~18.04.1

5.3.0-1028.29~18.04.1

5.3.0-1031.32~18.04.1

5.3.0-1032.33~18.04.1

5.3.0-1034.35~18.04.1

5.3.0-1035.36

Ubuntu:Pro:18.04:LTS / linux-azure-edge

Package

Name: linux-azure-edge
Purl: pkg:deb/ubuntu/linux-azure-edge@5.0.0-1012.12~18.04.2?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.18.0-1006.6~18.04.1

4.18.0-1007.7~18.04.1

4.18.0-1008.8~18.04.1

5.*

5.0.0-1012.12~18.04.2

Ubuntu:Pro:18.04:LTS / linux-gcp

Package

Name: linux-gcp
Purl: pkg:deb/ubuntu/linux-gcp@5.0.0-1034.35?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.15.0-1001.1

4.15.0-1003.3

4.15.0-1005.5

4.15.0-1006.6

4.15.0-1008.8

4.15.0-1009.9

4.15.0-1010.10

4.15.0-1014.14

4.15.0-1015.15

4.15.0-1017.18

4.15.0-1018.19

4.15.0-1019.20

4.15.0-1021.22

4.15.0-1023.24

4.15.0-1024.25

4.15.0-1025.26

4.15.0-1026.27

4.15.0-1027.28

4.15.0-1028.29

4.15.0-1029.31

4.15.0-1030.32

4.15.0-1032.34

4.15.0-1033.35

4.15.0-1034.36

4.15.0-1036.38

4.15.0-1037.39

4.15.0-1040.42

4.15.0-1042.45

4.15.0-1044.70

5.*

5.0.0-1020.20~18.04.1

5.0.0-1021.21~18.04.1

5.0.0-1025.26~18.04.1

5.0.0-1026.27~18.04.1

5.0.0-1028.29~18.04.1

5.0.0-1029.30~18.04.1

5.0.0-1031.32

5.0.0-1033.34

5.0.0-1034.35

Ubuntu:Pro:18.04:LTS / linux-gcp-5.3

Package

Name: linux-gcp-5.3
Purl: pkg:deb/ubuntu/linux-gcp-5.3@5.3.0-1032.34~18.04.1?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.3.0-1008.9~18.04.1

5.3.0-1009.10~18.04.1

5.3.0-1010.11~18.04.1

5.3.0-1012.13~18.04.1

5.3.0-1014.15~18.04.1

5.3.0-1016.17~18.04.1

5.3.0-1017.18~18.04.1

5.3.0-1018.19~18.04.1

5.3.0-1020.22~18.04.1

5.3.0-1026.28~18.04.1

5.3.0-1029.31~18.04.1

5.3.0-1030.32~18.04.1

5.3.0-1032.34~18.04.1

Ubuntu:Pro:18.04:LTS / linux-gcp-edge

Package

Name: linux-gcp-edge
Purl: pkg:deb/ubuntu/linux-gcp-edge@5.0.0-1013.13~18.04.1?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.18.0-1004.5~18.04.1

4.18.0-1005.6~18.04.1

4.18.0-1006.7~18.04.1

4.18.0-1007.8~18.04.1

4.18.0-1008.9~18.04.1

4.18.0-1009.10~18.04.1

4.18.0-1011.12~18.04.1

4.18.0-1012.13~18.04.1

4.18.0-1013.14~18.04.1

4.18.0-1015.16~18.04.1

5.*

5.0.0-1011.11~18.04.1

5.0.0-1013.13~18.04.1

Ubuntu:Pro:18.04:LTS / linux-hwe

Package

Name: linux-hwe
Purl: pkg:deb/ubuntu/linux-hwe@5.3.0-76.72?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.18.0-13.14~18.04.1

4.18.0-14.15~18.04.1

4.18.0-15.16~18.04.1

4.18.0-16.17~18.04.1

4.18.0-17.18~18.04.1

4.18.0-18.19~18.04.1

4.18.0-20.21~18.04.1

4.18.0-21.22~18.04.1

4.18.0-22.23~18.04.1

4.18.0-24.25~18.04.1

4.18.0-25.26~18.04.1

5.*

5.0.0-23.24~18.04.1

5.0.0-25.26~18.04.1

5.0.0-27.28~18.04.1

5.0.0-29.31~18.04.1

5.0.0-31.33~18.04.1

5.0.0-32.34~18.04.2

5.0.0-35.38~18.04.1

5.0.0-36.39~18.04.1

5.0.0-37.40~18.04.1

5.3.0-26.28~18.04.1

5.3.0-28.30~18.04.1

5.3.0-40.32~18.04.1

5.3.0-42.34~18.04.1

5.3.0-45.37~18.04.1

5.3.0-46.38~18.04.1

5.3.0-51.44~18.04.2

5.3.0-53.47~18.04.1

5.3.0-59.53~18.04.1

5.3.0-61.55~18.04.1

5.3.0-62.56~18.04.1

5.3.0-64.58~18.04.1

5.3.0-65.59

5.3.0-66.60

5.3.0-67.61

5.3.0-68.63

5.3.0-69.65

5.3.0-70.66

5.3.0-72.68

5.3.0-73.69

5.3.0-74.70

5.3.0-75.71

5.3.0-76.72

Ubuntu:Pro:18.04:LTS / linux-hwe-edge

Package

Name: linux-hwe-edge
Purl: pkg:deb/ubuntu/linux-hwe-edge@5.3.0-24.26~18.04.2?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.0.0-15.16~18.04.1

5.0.0-16.17~18.04.1

5.0.0-17.18~18.04.1

5.0.0-19.20~18.04.1

5.0.0-20.21~18.04.1

5.3.0-19.20~18.04.2

5.3.0-22.24~18.04.1

5.3.0-23.25~18.04.1

5.3.0-23.25~18.04.2

5.3.0-24.26~18.04.2

Ubuntu:Pro:18.04:LTS / linux-oem

Package

Name: linux-oem
Purl: pkg:deb/ubuntu/linux-oem@4.15.0-1103.114?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.15.0-1002.3

4.15.0-1004.5

4.15.0-1006.9

4.15.0-1008.11

4.15.0-1009.12

4.15.0-1012.15

4.15.0-1013.16

4.15.0-1015.18

4.15.0-1017.20

4.15.0-1018.21

4.15.0-1021.24

4.15.0-1024.29

4.15.0-1026.31

4.15.0-1028.33

4.15.0-1030.35

4.15.0-1033.38

4.15.0-1034.39

4.15.0-1035.40

4.15.0-1036.41

4.15.0-1038.43

4.15.0-1039.44

4.15.0-1043.48

4.15.0-1045.50

4.15.0-1050.57

4.15.0-1056.65

4.15.0-1057.66

4.15.0-1059.68

4.15.0-1063.72

4.15.0-1064.73

4.15.0-1065.75

4.15.0-1066.76

4.15.0-1067.77

4.15.0-1069.79

4.15.0-1073.83

4.15.0-1076.86

4.15.0-1079.89

4.15.0-1080.90

4.15.0-1081.91

4.15.0-1087.97

4.15.0-1090.100

4.15.0-1091.101

4.15.0-1093.103

4.15.0-1094.104

4.15.0-1096.106

4.15.0-1097.107

4.15.0-1099.109

4.15.0-1100.110

4.15.0-1101.112

4.15.0-1102.113

4.15.0-1103.114

Ubuntu:Pro:18.04:LTS / linux-oracle-5.0

Package

Name: linux-oracle-5.0
Purl: pkg:deb/ubuntu/linux-oracle-5.0@5.0.0-1014.19?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.0.0-1007.12~18.04.1

5.0.0-1008.13~18.04.1

5.0.0-1009.14~18.04.1

5.0.0-1010.15~18.04.1

5.0.0-1011.16

5.0.0-1013.18

5.0.0-1014.19

Ubuntu:Pro:18.04:LTS / linux-oracle-5.3

Package

Name: linux-oracle-5.3
Purl: pkg:deb/ubuntu/linux-oracle-5.3@5.3.0-1030.32~18.04.1?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.3.0-1011.12~18.04.1

5.3.0-1013.14~18.04.1

5.3.0-1014.15~18.04.1

5.3.0-1016.18~18.04.1

5.3.0-1018.20~18.04.1

5.3.0-1024.26~18.04.1

5.3.0-1027.29~18.04.1

5.3.0-1028.30~18.04.1

5.3.0-1030.32~18.04.1

Ubuntu:20.04:LTS / linux-hwe-5.8

Package

Name: linux-hwe-5.8
Purl: pkg:deb/ubuntu/linux-hwe-5.8@5.8.0-34.37~20.04.2?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.8.0-34.37~20.04.2

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

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "block-modules-5.8.0-34-generic-64k-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "block-modules-5.8.0-34-generic-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "block-modules-5.8.0-34-generic-lpae-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "crypto-modules-5.8.0-34-generic-64k-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "crypto-modules-5.8.0-34-generic-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "crypto-modules-5.8.0-34-generic-lpae-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "dasd-extra-modules-5.8.0-34-generic-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "dasd-modules-5.8.0-34-generic-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "fat-modules-5.8.0-34-generic-64k-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "fat-modules-5.8.0-34-generic-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "fat-modules-5.8.0-34-generic-lpae-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "fb-modules-5.8.0-34-generic-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "firewire-core-modules-5.8.0-34-generic-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "floppy-modules-5.8.0-34-generic-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "fs-core-modules-5.8.0-34-generic-64k-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "fs-core-modules-5.8.0-34-generic-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "fs-core-modules-5.8.0-34-generic-lpae-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "fs-secondary-modules-5.8.0-34-generic-64k-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "fs-secondary-modules-5.8.0-34-generic-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "fs-secondary-modules-5.8.0-34-generic-lpae-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "input-modules-5.8.0-34-generic-64k-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "input-modules-5.8.0-34-generic-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "input-modules-5.8.0-34-generic-lpae-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "ipmi-modules-5.8.0-34-generic-64k-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "ipmi-modules-5.8.0-34-generic-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "ipmi-modules-5.8.0-34-generic-lpae-di",
            "binary_version": "5.8.0-34.37~20.04.2"
        },
        {
            "binary_name": "kernel-image-5.8.0-34-generic-64k-di",
            "binary_version": "5.8.0-34.37~20.04.2"
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}

Ubuntu:Pro:20.04:LTS / linux-oem-5.6

Package

Name: linux-oem-5.6
Purl: pkg:deb/ubuntu/linux-oem-5.6@5.6.0-1056.60?arch=source&distro=esm-infra/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

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

5.6.0-1047.51

5.6.0-1048.52

5.6.0-1050.54

5.6.0-1052.56

5.6.0-1053.57

5.6.0-1054.58

5.6.0-1055.59

5.6.0-1056.60

Ubuntu:Pro:20.04:LTS / linux-raspi2

Package

Name: linux-raspi2
Purl: pkg:deb/ubuntu/linux-raspi2@5.4.0-1006.6?arch=source&distro=esm-infra/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.3.0-1007.8

5.3.0-1014.16

5.3.0-1015.17

5.3.0-1017.19

5.4.0-1004.4

5.4.0-1006.6

Ubuntu:Pro:20.04:LTS / linux-riscv

Package

Name: linux-riscv
Purl: pkg:deb/ubuntu/linux-riscv@5.4.0-40.45?arch=source&distro=esm-infra/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.4.0-24.28

5.4.0-26.30

5.4.0-27.31

5.4.0-28.32

5.4.0-30.34

5.4.0-31.35

5.4.0-33.37

5.4.0-34.38

5.4.0-36.41

5.4.0-37.42

5.4.0-39.44

5.4.0-40.45