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UBUNTU-CVE-2021-20261

MEDIUM6.4

A race condition was found in the Linux kernels implementation of the floppy disk drive controller driver software. The impact of this issue is lessened by the fact that the default permissions on the

Published Mar 11, 2021

Modified 6 months ago

Fix available

Details

A race condition was found in the Linux kernels implementation of the floppy disk drive controller driver software. The impact of this issue is lessened by the fact that the default permissions on the floppy device (/dev/fd0) are restricted to root. If the permissions on the device have changed the impact changes greatly. In the default configuration root (or equivalent) permissions are required to attack this flaw.

Affected Packages

Ubuntu:22.04:LTSlinux

Fixed in:

5.13.0-19.19

Ubuntu:24.04:LTSlinux

Fixed in:

6.5.0-9.9

Ubuntu:25.04linux

Fixed in:

6.11.0-8.8

Ubuntu:Pro:14.04:LTSlinux

Affected versions:

3.11.0-12.193.12.0-1.33.12.0-2.53.12.0-2.73.12.0-3.83.12.0-3.93.12.0-4.103.12.0-4.123.12.0-5.133.12.0-7.15+170 more

Ubuntu:16.04:LTSlinux

Affected versions:

4.2.0-16.194.2.0-17.214.2.0-19.234.3.0-1.104.3.0-2.114.3.0-5.164.3.0-6.174.3.0-7.184.4.0-10.254.4.0-101.124+115 more

Fixed in:

4.4.0-208.240

Ubuntu:20.04:LTSlinux

Affected versions:

5.3.0-18.195.3.0-24.26

Fixed in:

5.4.0-9.12

Ubuntu:18.04:LTSlinux

Fixed in:

4.13.0-16.19

Ubuntu:25.04linux-aws

Fixed in:

6.11.0-1004.4

Ubuntu:18.04:LTSlinux-aws

Fixed in:

4.15.0-1001.1

Ubuntu:Pro:14.04:LTSlinux-aws

Affected versions:

4.4.0-1002.24.4.0-1003.34.4.0-1005.54.4.0-1006.64.4.0-1009.94.4.0-1010.104.4.0-1011.114.4.0-1012.124.4.0-1014.144.4.0-1016.16+44 more

Fixed in:

4.4.0-1090.94

Ubuntu:16.04:LTSlinux-aws

Affected versions:

4.4.0-1001.104.4.0-1003.124.4.0-1004.134.4.0-1007.164.4.0-1009.184.4.0-1011.204.4.0-1012.214.4.0-1013.224.4.0-1016.254.4.0-1017.26+71 more

Fixed in:

4.4.0-1126.140

Ubuntu:20.04:LTSlinux-aws

Affected versions:

5.3.0-1003.35.3.0-1008.95.3.0-1009.105.3.0-1010.11

Fixed in:

5.4.0-1005.5

Ubuntu:24.04:LTSlinux-aws

Fixed in:

6.5.0-1008.8

Ubuntu:22.04:LTSlinux-aws

Fixed in:

5.13.0-1005.6

Ubuntu:Pro:18.04:LTSlinux-aws-5.0

Affected versions:

5.0.0-1021.24~18.04.15.0.0-1022.25~18.04.15.0.0-1023.26~18.04.15.0.0-1024.27~18.04.15.0.0-1025.285.0.0-1027.30

Ubuntu:20.04:LTSlinux-aws-5.15

Affected versions:

5.15.0-1014.18~20.04.1

Fixed in:

5.15.0-1015.19~20.04.1

Ubuntu:Pro:18.04:LTSlinux-aws-5.3

Affected versions:

5.3.0-1016.17~18.04.15.3.0-1017.18~18.04.15.3.0-1019.21~18.04.15.3.0-1023.25~18.04.15.3.0-1028.30~18.04.15.3.0-1030.32~18.04.15.3.0-1032.34~18.04.25.3.0-1033.355.3.0-1034.365.3.0-1035.37

Ubuntu:18.04:LTSlinux-aws-5.4

Affected versions:

5.4.0-1018.18~18.04.1

Fixed in:

5.4.0-1020.20~18.04.2

Ubuntu:22.04:LTSlinux-aws-6.8

Fixed in:

6.8.0-1009.9~22.04.2

Ubuntu:FIPS-updates:20.04:LTSlinux-aws-fips

Ubuntu:Pro:FIPS-updates:20.04:LTSlinux-aws-fips

Fixed in:

5.4.0-1021.21+fips2

Ubuntu:Pro:FIPS-updates:22.04:LTSlinux-aws-fips

Affected versions:

5.15.0-1051.56+fips1

Fixed in:

5.15.0-1052.57+fips1

Ubuntu:Pro:FIPS:20.04:LTSlinux-aws-fips

Fixed in:

5.4.0-1021.21+fips2

Ubuntu:FIPS-updates:18.04:LTSlinux-aws-fips

Ubuntu:FIPS:18.04:LTSlinux-aws-fips

Ubuntu:FIPS:20.04:LTSlinux-aws-fips

Ubuntu:FIPS-preview:22.04:LTSlinux-aws-fips

Affected versions:

5.15.0-1042.47+fips1

Ubuntu:FIPS-updates:22.04:LTSlinux-aws-fips

Affected versions:

5.15.0-1051.56+fips1

Ubuntu:Pro:FIPS:18.04:LTSlinux-aws-fips

Fixed in:

4.15.0-2000.4

Ubuntu:Pro:FIPS-updates:18.04:LTSlinux-aws-fips

Fixed in:

4.15.0-2000.4

Ubuntu:Pro:FIPS-preview:22.04:LTSlinux-aws-fips

Affected versions:

5.15.0-1042.47+fips1

Fixed in:

5.15.0-1051.56+fips1

Ubuntu:16.04:LTSlinux-aws-hwe

Affected versions:

4.15.0-1030.31~16.04.1

Fixed in:

4.15.0-1031.33~16.04.1

Ubuntu:16.04:LTSlinux-azure

Affected versions:

4.11.0-1009.94.11.0-1011.114.11.0-1013.134.11.0-1014.14

Fixed in:

4.11.0-1015.15

Ubuntu:24.04:LTSlinux-azure

Fixed in:

6.5.0-1007.7

Ubuntu:14.04:LTSlinux-azure

Fixed in:

4.15.0-1023.24~14.04.1

Ubuntu:25.04linux-azure

Fixed in:

6.11.0-1004.4

Ubuntu:Pro:18.04:LTSlinux-azure

Affected versions:

4.15.0-1002.24.15.0-1003.34.15.0-1004.44.15.0-1008.84.15.0-1009.94.15.0-1012.124.15.0-1013.134.15.0-1014.144.15.0-1018.184.15.0-1019.19+34 more

Ubuntu:20.04:LTSlinux-azure

Affected versions:

5.3.0-1003.35.3.0-1008.95.3.0-1009.10

Fixed in:

5.4.0-1006.6

Ubuntu:22.04:LTSlinux-azure

Fixed in:

5.13.0-1006.7

Ubuntu:18.04:LTSlinux-azure-4.15

Fixed in:

4.15.0-1082.92

Ubuntu:20.04:LTSlinux-azure-5.15

Fixed in:

5.15.0-1007.8~20.04.1

Ubuntu:Pro:18.04:LTSlinux-azure-5.3

Affected versions:

5.3.0-1007.8~18.04.15.3.0-1008.9~18.04.15.3.0-1009.10~18.04.15.3.0-1010.11~18.04.15.3.0-1012.13~18.04.15.3.0-1013.14~18.04.15.3.0-1016.17~18.04.15.3.0-1018.19~18.04.15.3.0-1019.20~18.04.15.3.0-1020.21~18.04.1+6 more

Ubuntu:18.04:LTSlinux-azure-5.4

Affected versions:

5.4.0-1020.20~18.04.1

Fixed in:

5.4.0-1022.22~18.04.1

Ubuntu:24.04:LTSlinux-azure-6.11

Fixed in:

6.11.0-1008.8~24.04.1

Ubuntu:22.04:LTSlinux-azure-6.8

Fixed in:

6.8.0-1008.8~22.04.1

Ubuntu:Pro:18.04:LTSlinux-azure-edge

Affected versions:

4.18.0-1006.6~18.04.14.18.0-1007.7~18.04.14.18.0-1008.8~18.04.15.0.0-1012.12~18.04.2

Ubuntu:Pro:20.04:LTSlinux-azure-fde

Affected versions:

5.4.0-1063.66+cvm2.25.4.0-1063.66+cvm3.25.4.0-1064.67+cvm1.15.4.0-1065.68+cvm2.15.4.0-1067.70+cvm1.15.4.0-1068.71+cvm1.15.4.0-1069.72+cvm1.15.4.0-1070.73+cvm1.15.4.0-1072.75+cvm1.15.4.0-1073.76+cvm1.1+16 more

Ubuntu:22.04:LTSlinux-azure-fde

Fixed in:

5.15.0-1019.24.1

Ubuntu:20.04:LTSlinux-azure-fde-5.15

Fixed in:

5.15.0-1019.24~20.04.1.1

Ubuntu:Pro:FIPS-updates:18.04:LTSlinux-azure-fips

Fixed in:

4.15.0-1002.2

Ubuntu:Pro:FIPS-preview:22.04:LTSlinux-azure-fips

Fixed in:

5.15.0-1053.61+fips1

Ubuntu:Pro:FIPS:20.04:LTSlinux-azure-fips

Fixed in:

5.4.0-1022.22+fips1

Ubuntu:Pro:FIPS-updates:22.04:LTSlinux-azure-fips

Affected versions:

5.15.0-1053.61+fips1

Fixed in:

5.15.0-1058.66+fips1

Ubuntu:Pro:FIPS-updates:20.04:LTSlinux-azure-fips

Fixed in:

5.4.0-1022.22+fips1

Ubuntu:Pro:FIPS:18.04:LTSlinux-azure-fips

Fixed in:

4.15.0-1002.2

Ubuntu:24.04:LTSlinux-azure-nvidia

Fixed in:

6.8.0-1013.14

Ubuntu:22.04:LTS:for:NVIDIA:BlueFieldlinux-bluefield

Fixed in:

5.15.0-1011.13

Ubuntu:20.04:LTSlinux-bluefield

Affected versions:

5.4.0-1007.10

Fixed in:

5.4.0-1011.14

Ubuntu:18.04:LTSlinux-dell300x

Fixed in:

4.15.0-1005.8

Ubuntu:Pro:FIPS:18.04:LTSlinux-fips

Fixed in:

4.15.0-1011.12

Ubuntu:Pro:FIPS-preview:22.04:LTSlinux-fips

Fixed in:

5.15.0-73.80+fips1

Ubuntu:Pro:FIPS-updates:20.04:LTSlinux-fips

Fixed in:

5.4.0-1026.30

Ubuntu:Pro:FIPS:16.04:LTSlinux-fips

Affected versions:

4.4.0-1001.14.4.0-1002.2

Ubuntu:Pro:FIPS:20.04:LTSlinux-fips

Fixed in:

5.4.0-1007.8

Ubuntu:Pro:FIPS-updates:18.04:LTSlinux-fips

Fixed in:

4.15.0-1027.32

Ubuntu:Pro:FIPS:16.04:LTSlinux-fips

Affected versions:

4.4.0-1003.34.4.0-1005.54.4.0-1006.64.4.0-1008.104.4.0-1010.134.4.0-1011.144.4.0-1012.164.4.0-1013.174.4.0-1015.204.4.0-1017.22+28 more

Fixed in:

4.4.0-1060.66

Ubuntu:FIPS:16.04:LTSlinux-fips

Affected versions:

4.4.0-1003.34.4.0-1005.54.4.0-1006.64.4.0-1008.104.4.0-1010.134.4.0-1011.144.4.0-1012.164.4.0-1013.174.4.0-1015.204.4.0-1017.22+28 more

Ubuntu:Pro:FIPS-updates:22.04:LTSlinux-fips

Affected versions:

5.15.0-73.80+fips1

Fixed in:

5.15.0-92.102+fips1

Ubuntu:22.04:LTSlinux-gcp

Fixed in:

5.13.0-1005.6

Ubuntu:20.04:LTSlinux-gcp

Affected versions:

5.3.0-1004.45.3.0-1009.105.3.0-1011.12

Fixed in:

5.4.0-1005.5

Ubuntu:16.04:LTSlinux-gcp

Fixed in:

4.10.0-1004.4

Ubuntu:Pro:18.04:LTSlinux-gcp

Affected versions:

4.15.0-1001.14.15.0-1003.34.15.0-1005.54.15.0-1006.64.15.0-1008.84.15.0-1009.94.15.0-1010.104.15.0-1014.144.15.0-1015.154.15.0-1017.18+28 more

Ubuntu:25.04linux-gcp

Fixed in:

6.11.0-1003.3

Ubuntu:24.04:LTSlinux-gcp

Fixed in:

6.5.0-1007.7

Ubuntu:18.04:LTSlinux-gcp-4.15

Fixed in:

4.15.0-1071.81

Ubuntu:20.04:LTSlinux-gcp-5.15

Fixed in:

5.15.0-1006.9~20.04.1

Ubuntu:Pro:18.04:LTSlinux-gcp-5.3

Affected versions:

5.3.0-1008.9~18.04.15.3.0-1009.10~18.04.15.3.0-1010.11~18.04.15.3.0-1012.13~18.04.15.3.0-1014.15~18.04.15.3.0-1016.17~18.04.15.3.0-1017.18~18.04.15.3.0-1018.19~18.04.15.3.0-1020.22~18.04.15.3.0-1026.28~18.04.1+3 more

Ubuntu:18.04:LTSlinux-gcp-5.4

Affected versions:

5.4.0-1019.19~18.04.2

Fixed in:

5.4.0-1021.21~18.04.1

Ubuntu:24.04:LTSlinux-gcp-6.11

Fixed in:

6.11.0-1006.6~24.04.2

Ubuntu:22.04:LTSlinux-gcp-6.8

Fixed in:

6.8.0-1010.11~22.04.1

Ubuntu:Pro:18.04:LTSlinux-gcp-edge

Affected versions:

4.18.0-1004.5~18.04.14.18.0-1005.6~18.04.14.18.0-1006.7~18.04.14.18.0-1007.8~18.04.14.18.0-1008.9~18.04.14.18.0-1009.10~18.04.14.18.0-1011.12~18.04.14.18.0-1012.13~18.04.14.18.0-1013.14~18.04.14.18.0-1015.16~18.04.1+2 more

Ubuntu:Pro:FIPS-preview:22.04:LTSlinux-gcp-fips

Fixed in:

5.15.0-1048.56+fips1

Ubuntu:Pro:FIPS-updates:20.04:LTSlinux-gcp-fips

Fixed in:

5.4.0-1021.21+fips1

Ubuntu:Pro:FIPS-updates:22.04:LTSlinux-gcp-fips

Fixed in:

5.15.0-1048.56+fips1

Ubuntu:Pro:FIPS-updates:18.04:LTSlinux-gcp-fips

Fixed in:

4.15.0-2013.14

Ubuntu:Pro:FIPS:18.04:LTSlinux-gcp-fips

Fixed in:

4.15.0-1001.1

Ubuntu:Pro:FIPS:20.04:LTSlinux-gcp-fips

Fixed in:

5.4.0-1021.21+fips1

Ubuntu:24.04:LTSlinux-gke

Fixed in:

6.8.0-1003.5

Ubuntu:22.04:LTSlinux-gke

Fixed in:

5.15.0-1002.2

Ubuntu:Pro:20.04:LTSlinux-gke

Affected versions:

5.4.0-1033.355.4.0-1035.375.4.0-1036.385.4.0-1037.395.4.0-1039.415.4.0-1041.435.4.0-1042.445.4.0-1043.455.4.0-1044.465.4.0-1046.48+41 more

Ubuntu:Pro:18.04:LTSlinux-gke-4.15

Affected versions:

4.15.0-1030.324.15.0-1032.344.15.0-1033.354.15.0-1034.364.15.0-1036.384.15.0-1037.394.15.0-1040.424.15.0-1041.434.15.0-1042.444.15.0-1044.46+23 more

Ubuntu:18.04:LTSlinux-gke-5.3

Fixed in:

5.3.0-1011.12~18.04.1

Ubuntu:18.04:LTSlinux-gke-5.4

Fixed in:

5.4.0-1025.25~18.04.1

Ubuntu:20.04:LTSlinux-gkeop

Fixed in:

5.4.0-1008.9

Ubuntu:24.04:LTSlinux-gkeop

Fixed in:

6.8.0-1001.3

Ubuntu:22.04:LTSlinux-gkeop

Fixed in:

5.15.0-1001.2

Ubuntu:20.04:LTSlinux-gkeop-5.15

Fixed in:

5.15.0-1003.5~20.04.2

Ubuntu:18.04:LTSlinux-gkeop-5.4

Fixed in:

5.4.0-1001.1

Ubuntu:16.04:LTSlinux-hwe

Affected versions:

4.8.0-36.36~16.04.1

Fixed in:

4.8.0-39.42~16.04.1

Ubuntu:Pro:18.04:LTSlinux-hwe

Affected versions:

4.18.0-13.14~18.04.14.18.0-14.15~18.04.14.18.0-15.16~18.04.14.18.0-16.17~18.04.14.18.0-17.18~18.04.14.18.0-18.19~18.04.14.18.0-20.21~18.04.14.18.0-21.22~18.04.14.18.0-22.23~18.04.14.18.0-24.25~18.04.1+33 more

Ubuntu:20.04:LTSlinux-hwe-5.15

Fixed in:

5.15.0-33.34~20.04.1

Ubuntu:18.04:LTSlinux-hwe-5.4

Fixed in:

5.4.0-37.41~18.04.1

Ubuntu:20.04:LTSlinux-hwe-5.8

Fixed in:

5.8.0-23.24~20.04.1

Ubuntu:24.04:LTSlinux-hwe-6.11

Affected versions:

6.11.0-17.17~24.04.2

Fixed in:

6.11.0-19.19~24.04.1

Ubuntu:22.04:LTSlinux-hwe-6.8

Fixed in:

6.8.0-38.38~22.04.1

Ubuntu:Pro:16.04:LTSlinux-hwe-edge

Affected versions:

4.10.0-14.16~16.04.14.10.0-19.21~16.04.14.10.0-20.22~16.04.14.10.0-21.23~16.04.14.10.0-22.24~16.04.14.10.0-24.28~16.04.14.10.0-26.30~16.04.14.11.0-13.19~16.04.14.11.0-14.20~16.04.14.13.0-16.19~16.04.3+13 more

Ubuntu:Pro:18.04:LTSlinux-hwe-edge

Affected versions:

5.0.0-15.16~18.04.15.0.0-16.17~18.04.15.0.0-17.18~18.04.15.0.0-19.20~18.04.15.0.0-20.21~18.04.15.3.0-19.20~18.04.25.3.0-22.24~18.04.15.3.0-23.25~18.04.15.3.0-23.25~18.04.25.3.0-24.26~18.04.2

Ubuntu:18.04:LTSlinux-hwe-edge

Fixed in:

5.0.0-15.16~18.04.1

Ubuntu:24.04:LTSlinux-ibm

Fixed in:

6.5.0-1009.9

Ubuntu:22.04:LTSlinux-ibm

Fixed in:

5.15.0-1002.2

Ubuntu:20.04:LTSlinux-ibm

Affected versions:

5.4.0-1003.4

Fixed in:

5.4.0-1004.5

Ubuntu:20.04:LTSlinux-ibm-5.15

Affected versions:

5.15.0-1033.36~20.04.1

Fixed in:

5.15.0-1034.37~20.04.1

Ubuntu:18.04:LTSlinux-ibm-5.4

Fixed in:

5.4.0-1010.11~18.04.2

Ubuntu:22.04:LTSlinux-ibm-6.8

Fixed in:

6.8.0-1008.8~22.04.1

Ubuntu:22.04:LTSlinux-intel-iot-realtime

Affected versions:

5.15.0-1073.75

Ubuntu:22.04:LTS:Realtime:Kernellinux-intel-iot-realtime

Ubuntu:Pro:22.04:LTS:Realtime:Kernellinux-intel-iot-realtime

Fixed in:

5.15.0-1021.26

Ubuntu:22.04:LTSlinux-intel-iotg

Fixed in:

5.15.0-1004.6

Ubuntu:20.04:LTSlinux-intel-iotg-5.15

Fixed in:

5.15.0-1003.5~20.04.1

Ubuntu:20.04:LTSlinux-iot

Fixed in:

5.4.0-1001.3

Ubuntu:18.04:LTSlinux-kvm

Fixed in:

4.15.0-1002.2

Ubuntu:22.04:LTSlinux-kvm

Fixed in:

5.13.0-1004.4

Ubuntu:16.04:LTSlinux-kvm

Affected versions:

4.4.0-1004.94.4.0-1007.124.4.0-1008.134.4.0-1009.144.4.0-1010.154.4.0-1012.174.4.0-1013.184.4.0-1015.204.4.0-1017.224.4.0-1019.24+50 more

Fixed in:

4.4.0-1091.100

Ubuntu:20.04:LTSlinux-kvm

Affected versions:

5.3.0-1003.35.3.0-1008.95.3.0-1009.10

Fixed in:

5.4.0-1004.4

Ubuntu:24.04:LTSlinux-lowlatency

Fixed in:

6.5.0-9.9.1

Ubuntu:22.04:LTSlinux-lowlatency

Fixed in:

5.15.0-22.22

Ubuntu:20.04:LTSlinux-lowlatency-hwe-5.15

Fixed in:

5.15.0-33.34~20.04.1

Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11

Affected versions:

6.11.0-1009.10~24.04.1

Fixed in:

6.11.0-1011.12~24.04.1

Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8

Fixed in:

6.8.0-38.38.1~22.04.2

Ubuntu:Pro:14.04:LTSlinux-lts-xenial

Affected versions:

4.4.0-101.124~14.04.14.4.0-103.126~14.04.14.4.0-104.127~14.04.14.4.0-108.131~14.04.14.4.0-109.132~14.04.14.4.0-111.134~14.04.14.4.0-112.135~14.04.14.4.0-116.140~14.04.14.4.0-119.143~14.04.14.4.0-121.145~14.04.1+87 more

Fixed in:

4.4.0-208.240~14.04.1

Ubuntu:24.04:LTSlinux-nvidia

Fixed in:

6.8.0-1007.7

Ubuntu:22.04:LTSlinux-nvidia

Fixed in:

5.15.0-1005.5

Ubuntu:22.04:LTSlinux-nvidia-6.5

Fixed in:

6.5.0-1004.4

Ubuntu:22.04:LTSlinux-nvidia-6.8

Fixed in:

6.8.0-1008.8~22.04.1

Ubuntu:24.04:LTSlinux-nvidia-lowlatency

Fixed in:

6.8.0-1009.9.1

Ubuntu:22.04:LTSlinux-nvidia-tegra

Affected versions:

5.15.0-1009.95.15.0-1010.105.15.0-1012.12

Fixed in:

5.15.0-1013.13

Ubuntu:24.04:LTSlinux-nvidia-tegra

Fixed in:

6.8.0-1003.3

Ubuntu:20.04:LTSlinux-nvidia-tegra-5.15

Fixed in:

5.15.0-1009.9~20.04.1

Ubuntu:22.04:LTSlinux-nvidia-tegra-igx

Fixed in:

5.15.0-1001.1

Ubuntu:Pro:18.04:LTSlinux-oem

Affected versions:

4.15.0-1002.34.15.0-1004.54.15.0-1006.94.15.0-1008.114.15.0-1009.124.15.0-1012.154.15.0-1013.164.15.0-1015.184.15.0-1017.204.15.0-1018.21+40 more

Ubuntu:20.04:LTSlinux-oem-5.10

Fixed in:

5.10.0-1008.9

Ubuntu:20.04:LTSlinux-oem-5.6

Fixed in:

5.6.0-1007.7

Ubuntu:24.04:LTSlinux-oem-6.11

Fixed in:

6.11.0-1007.7

Ubuntu:24.04:LTSlinux-oem-6.14

Affected versions:

6.14.0-1004.4

Fixed in:

6.14.0-1005.5

Ubuntu:24.04:LTSlinux-oem-6.8

Fixed in:

6.8.0-1003.3

Ubuntu:18.04:LTSlinux-oem-osp1

Fixed in:

5.0.0-1010.11

Ubuntu:18.04:LTSlinux-oracle

Affected versions:

4.15.0-1007.9

Fixed in:

4.15.0-1008.10

Ubuntu:24.04:LTSlinux-oracle

Fixed in:

6.5.0-1010.10

Ubuntu:16.04:LTSlinux-oracle

Affected versions:

4.15.0-1007.9~16.04.1

Fixed in:

4.15.0-1008.10~16.04.1

Ubuntu:25.04linux-oracle

Fixed in:

6.11.0-1006.6

Ubuntu:20.04:LTSlinux-oracle

Affected versions:

5.3.0-1002.25.3.0-1007.85.3.0-1008.9

Fixed in:

5.4.0-1005.5

Ubuntu:22.04:LTSlinux-oracle

Fixed in:

5.13.0-1008.10

Ubuntu:Pro:18.04:LTSlinux-oracle-5.0

Affected versions:

5.0.0-1007.12~18.04.15.0.0-1008.13~18.04.15.0.0-1009.14~18.04.15.0.0-1010.15~18.04.15.0.0-1011.165.0.0-1013.185.0.0-1014.19

Ubuntu:20.04:LTSlinux-oracle-5.15

Fixed in:

5.15.0-1007.9~20.04.1

Ubuntu:Pro:18.04:LTSlinux-oracle-5.3

Affected versions:

5.3.0-1011.12~18.04.15.3.0-1013.14~18.04.15.3.0-1014.15~18.04.15.3.0-1016.18~18.04.15.3.0-1018.20~18.04.15.3.0-1024.26~18.04.15.3.0-1027.29~18.04.15.3.0-1028.30~18.04.15.3.0-1030.32~18.04.1

Ubuntu:18.04:LTSlinux-oracle-5.4

Affected versions:

5.4.0-1019.19~18.04.1

Fixed in:

5.4.0-1021.21~18.04.1

Ubuntu:22.04:LTSlinux-oracle-6.8

Fixed in:

6.8.0-1006.6~22.04.3

Ubuntu:25.04linux-raspi

Fixed in:

6.11.0-1004.4

Ubuntu:22.04:LTSlinux-raspi

Fixed in:

5.13.0-1008.9

Ubuntu:20.04:LTSlinux-raspi

Fixed in:

5.4.0-1007.7

Ubuntu:24.04:LTSlinux-raspi

Fixed in:

6.5.0-1005.7

Ubuntu:18.04:LTSlinux-raspi-5.4

Fixed in:

5.4.0-1013.13~18.04.1

Ubuntu:24.04:LTS:Realtime:Kernellinux-raspi-realtime

Ubuntu:24.04:LTSlinux-raspi-realtime

Affected versions:

6.8.0-2019.20

Ubuntu:Pro:24.04:LTS:Realtime:Kernellinux-raspi-realtime

Fixed in:

6.7.0-2001.1

Ubuntu:16.04:LTSlinux-raspi2

Affected versions:

4.2.0-1013.194.2.0-1014.214.3.0-1006.64.4.0-1003.44.4.0-1004.54.4.0-1009.104.4.0-1010.124.4.0-1010.134.4.0-1012.164.4.0-1016.22+84 more

Fixed in:

4.4.0-1150.161

Ubuntu:Pro:20.04:LTSlinux-raspi2

Affected versions:

5.3.0-1007.85.3.0-1014.165.3.0-1015.175.3.0-1017.195.4.0-1004.45.4.0-1006.6

Ubuntu:18.04:LTSlinux-raspi2

Fixed in:

4.13.0-1005.5

Ubuntu:18.04:LTSlinux-raspi2-5.3

Fixed in:

5.3.0-1017.19~18.04.1

Ubuntu:24.04:LTSlinux-realtime

Fixed in:

6.8.1-1015.16

Ubuntu:Pro:24.04:LTS:Realtime:Kernellinux-realtime

Fixed in:

6.8.0-1008.19

Ubuntu:22.04:LTSlinux-realtime

Affected versions:

5.15.0-1032.35

Ubuntu:25.04linux-realtime

Fixed in:

6.11.0-1001.1

Ubuntu:Pro:22.04:LTS:Realtime:Kernellinux-realtime

Fixed in:

5.15.0-1006.6

Ubuntu:25.04linux-riscv

Fixed in:

6.11.0-8.8.1

Ubuntu:Pro:20.04:LTSlinux-riscv

Affected versions:

5.4.0-24.285.4.0-26.305.4.0-27.315.4.0-28.325.4.0-30.345.4.0-31.355.4.0-33.375.4.0-34.385.4.0-36.415.4.0-37.42+2 more

Ubuntu:24.04:LTSlinux-riscv

Fixed in:

6.5.0-9.9.1

Ubuntu:22.04:LTSlinux-riscv

Affected versions:

5.13.0-1004.45.13.0-1006.6+22.04.15.13.0-1007.7+22.04.15.13.0-1010.11+22.04.15.15.0-1004.45.15.0-1005.55.15.0-1006.65.15.0-1007.75.15.0-1008.85.15.0-1011.12+13 more

Ubuntu:20.04:LTSlinux-riscv-5.15

Fixed in:

5.15.0-1015.17~20.04.1

Ubuntu:24.04:LTSlinux-riscv-6.14

Fixed in:

6.14.0-22.22.1~24.04.1

Ubuntu:22.04:LTSlinux-riscv-6.8

Fixed in:

6.8.0-38.38.1~22.04.1

Ubuntu:16.04:LTSlinux-snapdragon

Affected versions:

4.4.0-1012.124.4.0-1013.144.4.0-1013.154.4.0-1015.184.4.0-1019.224.4.0-1020.234.4.0-1022.254.4.0-1024.274.4.0-1026.294.4.0-1030.33+82 more

Fixed in:

4.4.0-1154.164

Ubuntu:18.04:LTSlinux-snapdragon

Affected versions:

4.4.0-1077.824.4.0-1078.834.4.0-1079.844.4.0-1081.86

Fixed in:

4.15.0-1053.57

Ubuntu:20.04:LTSlinux-xilinx-zynqmp

Fixed in:

5.4.0-1020.24

Ubuntu:22.04:LTSlinux-xilinx-zynqmp

Fixed in:

5.15.0-1022.26

References

REPORThttps://bugzilla.redhat.com/show_bug.cgi?id=1932150 REPORThttps://git.kernel.org/linus/a0c80efe5956ccce9fe7ae5c78542578c07bc20a REPORThttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a0c80efe5956ccce9fe7ae5c78542578c07bc20a REPORThttps://ubuntu.com/security/CVE-2021-20261 ADVISORYhttps://ubuntu.com/security/notices/USN-4904-1 REPORThttps://www.cve.org/CVERecord?id=CVE-2021-20261

CVSS Analysis

CVSS v3.1

6.4

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

HighAC:H

Privileges Required

HighPR:H

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Upstream

Related

Timeline

PublishedMar 11, 2021

ModifiedJul 15, 2025

UBUNTU-CVE-2021-20261 | Mondoo Vulnerability Intelligence