CVE-2020-28941: Medium severity Linux Linux kernel vulnerability

Published Nov 19, 2020
·
Updated

An issue was discovered in drivers/accessibility/speakup/spkttyio.c in the Linux kernel through 5.9.9. Local attackers on systems with the speakup driver could cause a local denial of service attack, aka CID-d41227544427. This occurs because of an invalid free when the line discipline is used more than once.

Affected Software

74 affected componentsFixes available
Linux Linux kernel<=5.9.9
Fedoraproject Fedora=32
Fedoraproject Fedora=33
Debian Debian Linux=9.0
debian/linux
5.10.223-15.10.234-16.1.129-16.1.135-16.12.22-16.12.25-1
ubuntu/linux-azure<4.15.0-1108.120~14.04.1
4.15.0-1108.120~14.04.1
ubuntu/linux-aws-hwe<4.15.0-1094.101~16.04.1
4.15.0-1094.101~16.04.1
ubuntu/linux-azure<4.15.0-1108.120~16.04.1
4.15.0-1108.120~16.04.1
ubuntu/linux-gcp<4.15.0-1093.106~16.04.1
4.15.0-1093.106~16.04.1
ubuntu/linux-hwe<4.15.0-136.140~16.04.1
4.15.0-136.140~16.04.1
ubuntu/linux-oracle<4.15.0-1065.73~16.04.1
4.15.0-1065.73~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux<4.15.0-136.140
4.15.0-136.140
ubuntu/linux-aws<4.15.0-1094.101
4.15.0-1094.101
ubuntu/linux-aws-5.4<5.4.0-1038.40~18.04.1
5.4.0-1038.40~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1108.120
4.15.0-1108.120
ubuntu/linux-azure-5.4<5.4.0-1040.42~18.04.1
5.4.0-1040.42~18.04.1
ubuntu/linux-dell300x<4.15.0-1012.16
4.15.0-1012.16
ubuntu/linux-gcp-4.15<4.15.0-1093.106
4.15.0-1093.106
ubuntu/linux-gcp-5.4<5.4.0-1037.40~18.04.1
5.4.0-1037.40~18.04.1
ubuntu/linux-gke-4.15<4.15.0-1079.84
4.15.0-1079.84
ubuntu/linux-gke-5.4<5.4.0-1036.38~18.04.1
5.4.0-1036.38~18.04.1
ubuntu/linux-gkeop-5.4<5.4.0-1010.11~18.04.1
5.4.0-1010.11~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-66.74~18.04.2
5.4.0-66.74~18.04.2
ubuntu/linux-kvm<4.15.0-1085.87
4.15.0-1085.87
ubuntu/linux-oracle<4.15.0-1065.73
4.15.0-1065.73
ubuntu/linux-oracle-5.4<5.4.0-1038.41~18.04.1
5.4.0-1038.41~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1029.32~18.04.1
5.4.0-1029.32~18.04.1
ubuntu/linux-raspi2<4.15.0-1079.84
4.15.0-1079.84
ubuntu/linux-snapdragon<4.15.0-1096.105
4.15.0-1096.105
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-azure*
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-5.3*
ubuntu/linux-gcp-edge*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-fips<4.15.0-2037.39
4.15.0-2037.39
ubuntu/linux-azure-fips<4.15.0-2020.23
4.15.0-2020.23
ubuntu/linux-fips<4.15.0-1053.61
4.15.0-1053.61
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-66.74
5.4.0-66.74
ubuntu/linux-aws<5.4.0-1038.40
5.4.0-1038.40
ubuntu/linux-azure<5.4.0-1040.42
5.4.0-1040.42
ubuntu/linux-gcp<5.4.0-1037.40
5.4.0-1037.40
ubuntu/linux-gke<5.4.0-1036.38
5.4.0-1036.38
ubuntu/linux-gkeop<5.4.0-1010.11
5.4.0-1010.11
ubuntu/linux-hwe-5.8<5.8.0-44.50~20.04.1
5.8.0-44.50~20.04.1
ubuntu/linux-kvm<5.4.0-1033.34
5.4.0-1033.34
ubuntu/linux-oracle<5.4.0-1038.41
5.4.0-1038.41
ubuntu/linux-raspi<5.4.0-1029.32
5.4.0-1029.32
ubuntu/linux-riscv-5.8<5.8.0-17.19~20.04.1
5.8.0-17.19~20.04.1
ubuntu/linux-oem-5.6*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-aws-fips<5.4.0-1069.73+fips2
5.4.0-1069.73+fips2
ubuntu/linux-azure-fips<5.4.0-1073.76+fips1
5.4.0-1073.76+fips1
ubuntu/linux-gcp-fips<5.4.0-1067.71~20.04.1
5.4.0-1067.71~20.04.1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-realtime*
ubuntu/linux-raspi-realtime*
ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.22-1Fixed in 6.12.25-1
  2. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1108.120~14.04.1
  3. Upgrade

    Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-1094.101~16.04.1
  4. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1108.120~16.04.1
  5. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 4.15.0-1093.106~16.04.1
  6. Upgrade

    Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-136.140~16.04.1
  7. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 4.15.0-1065.73~16.04.1
  8. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 4.15.0-136.140
  9. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.15.0-1094.101
  10. Upgrade

    Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1038.40~18.04.1
  11. Upgrade

    Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1108.120
  12. Upgrade

    Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1040.42~18.04.1
  13. Upgrade

    Upgrade ubuntu/linux-dell300x to a version that resolves this vulnerability.

    Fixed in 4.15.0-1012.16
  14. Upgrade

    Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1093.106
  15. Upgrade

    Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1037.40~18.04.1
  16. Upgrade

    Upgrade ubuntu/linux-gke-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1079.84
  17. Upgrade

    Upgrade ubuntu/linux-gke-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1036.38~18.04.1
  18. Upgrade

    Upgrade ubuntu/linux-gkeop-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1010.11~18.04.1
  19. Upgrade

    Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-66.74~18.04.2
  20. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 4.15.0-1085.87
  21. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 4.15.0-1065.73
  22. Upgrade

    Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1038.41~18.04.1
  23. Upgrade

    Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1029.32~18.04.1
  24. Upgrade

    Upgrade ubuntu/linux-raspi2 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1079.84
  25. Upgrade

    Upgrade ubuntu/linux-snapdragon to a version that resolves this vulnerability.

    Fixed in 4.15.0-1096.105
  26. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2037.39
  27. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2020.23
  28. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-1053.61
  29. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 5.4.0-66.74
  30. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 5.4.0-1038.40
  31. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 5.4.0-1040.42
  32. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1037.40
  33. Upgrade

    Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.

    Fixed in 5.4.0-1036.38
  34. Upgrade

    Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.

    Fixed in 5.4.0-1010.11
  35. Upgrade

    Upgrade ubuntu/linux-hwe-5.8 to a version that resolves this vulnerability.

    Fixed in 5.8.0-44.50~20.04.1
  36. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1033.34
  37. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 5.4.0-1038.41
  38. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0-1029.32
  39. Upgrade

    Upgrade ubuntu/linux-riscv-5.8 to a version that resolves this vulnerability.

    Fixed in 5.8.0-17.19~20.04.1
  40. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1069.73+fips2
  41. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1073.76+fips1
  42. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1067.71~20.04.1

Event History

Nov 19, 2020
CVE Published
via MITRE·03:23 PM
Data Sourced
via MITRE·03:23 PM
Description
Data Sourced
via OSV·07:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·07:15 PM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2020-28941?

CVE-2020-28941 has a severity rating categorized as medium.

2

How do I fix CVE-2020-28941?

To fix CVE-2020-28941, update the Linux kernel to version 5.10 or higher.

3

Which Linux kernel versions are affected by CVE-2020-28941?

CVE-2020-28941 affects Linux kernel versions up to and including 5.9.9.

4

Can CVE-2020-28941 be exploited remotely?

CVE-2020-28941 cannot be exploited remotely as it requires local access to the system.

5

What type of vulnerability is CVE-2020-28941?

CVE-2020-28941 is classified as a local denial of service vulnerability.

Company

Resources

Contact

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