CVE-2021-38198: Medium severity Linux Linux kernel vulnerability

Published Aug 8, 2021
·
Updated

arch/x86/kvm/mmu/pagingtmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access permissions of a shadow page, leading to a missing guest protection page fault.

Affected Software

96 affected componentsFixes available
Linux Linux kernel<5.12.11
Debian Debian Linux=9.0
debian/linux
5.10.223-15.10.234-16.1.129-16.1.135-16.12.25-16.12.27-1
ubuntu/linux-aws<4.4.0-1102.107
4.4.0-1102.107
ubuntu/linux-azure<4.15.0-1125.138~14.04.1
4.15.0-1125.138~14.04.1
ubuntu/linux-lts-xenial<4.4.0-222.255~14.04.1
4.4.0-222.255~14.04.1
ubuntu/linux*
ubuntu/linux<4.4.0-222.255
4.4.0-222.255
ubuntu/linux-aws<4.4.0-1138.152
4.4.0-1138.152
ubuntu/linux-aws-hwe<4.15.0-1113.120~16.04.1
4.15.0-1113.120~16.04.1
ubuntu/linux-azure<4.15.0-1125.138~16.04.1
4.15.0-1125.138~16.04.1
ubuntu/linux-gcp<4.15.0-1110.124~16.04.1
4.15.0-1110.124~16.04.1
ubuntu/linux-hwe<4.15.0-161.169~16.04.1
4.15.0-161.169~16.04.1
ubuntu/linux-kvm<4.4.0-1103.112
4.4.0-1103.112
ubuntu/linux-oracle<4.15.0-1082.90~16.04.1
4.15.0-1082.90~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux-fips<4.4.0-1072.78
4.4.0-1072.78
ubuntu/linux-fips*
ubuntu/linux<4.15.0-161.169
4.15.0-161.169
ubuntu/linux-aws<4.15.0-1114.121
4.15.0-1114.121
ubuntu/linux-aws-5.4<5.4.0-1058.61~18.04.3
5.4.0-1058.61~18.04.3
ubuntu/linux-azure-4.15<4.15.0-1125.138
4.15.0-1125.138
ubuntu/linux-azure-5.4<5.4.0-1062.65~18.04.1
5.4.0-1062.65~18.04.1
ubuntu/linux-dell300x<4.15.0-1029.34
4.15.0-1029.34
ubuntu/linux-gcp-4.15<4.15.0-1110.124
4.15.0-1110.124
ubuntu/linux-gcp-5.4<5.4.0-1056.60~18.04.1
5.4.0-1056.60~18.04.1
ubuntu/linux-gke-5.4<5.4.0-1054.57~18.04.1
5.4.0-1054.57~18.04.1
ubuntu/linux-gkeop-5.4<5.4.0-1025.26~18.04.1
5.4.0-1025.26~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-89.100~18.04.1
5.4.0-89.100~18.04.1
ubuntu/linux-kvm<4.15.0-1101.103
4.15.0-1101.103
ubuntu/linux-oracle<4.15.0-1082.90
4.15.0-1082.90
ubuntu/linux-oracle-5.4<5.4.0-1056.60~18.04.1
5.4.0-1056.60~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1045.49~18.04.1
5.4.0-1045.49~18.04.1
ubuntu/linux-raspi2<4.15.0-1097.103
4.15.0-1097.103
ubuntu/linux-snapdragon<4.15.0-1114.123
4.15.0-1114.123
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-gke-4.15*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-fips<4.15.0-2055.57
4.15.0-2055.57
ubuntu/linux-azure-fips<4.15.0-2037.41
4.15.0-2037.41
ubuntu/linux-fips<4.15.0-1071.80
4.15.0-1071.80
ubuntu/linux-gcp-fips<4.15.0-2020.22
4.15.0-2020.22
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-89.100
5.4.0-89.100
ubuntu/linux-aws<5.4.0-1058.61
5.4.0-1058.61
ubuntu/linux-aws-5.11<5.11.0-1016.17~20.04.1
5.11.0-1016.17~20.04.1
ubuntu/linux-azure<5.4.0-1062.65
5.4.0-1062.65
ubuntu/linux-azure-5.11<5.11.0-1013.14~20.04.1
5.11.0-1013.14~20.04.1
ubuntu/linux-bluefield<5.4.0-1020.23
5.4.0-1020.23
ubuntu/linux-gcp<5.4.0-1056.60
5.4.0-1056.60
ubuntu/linux-gcp-5.11<5.11.0-1017.19~20.04.1
5.11.0-1017.19~20.04.1
ubuntu/linux-gke<5.4.0-1054.57
5.4.0-1054.57
ubuntu/linux-gkeop<5.4.0-1025.26
5.4.0-1025.26
ubuntu/linux-hwe-5.11<5.11.0-34.36~20.04.1
5.11.0-34.36~20.04.1
ubuntu/linux-ibm<5.4.0-1006.7
5.4.0-1006.7
ubuntu/linux-kvm<5.4.0-1048.50
5.4.0-1048.50
ubuntu/linux-oem-5.10<5.10.0-1038.40
5.10.0-1038.40
ubuntu/linux-oracle<5.4.0-1056.60
5.4.0-1056.60
ubuntu/linux-oracle-5.11<5.11.0-1016.17~20.04.1
5.11.0-1016.17~20.04.1
ubuntu/linux-raspi<5.4.0-1045.49
5.4.0-1045.49
ubuntu/linux-riscv-5.11<5.11.0-1017.18~20.04.1
5.11.0-1017.18~20.04.1
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.8*
ubuntu/linux-gcp-5.8*
ubuntu/linux-hwe-5.8*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.8*
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-fips<5.4.0-1035.41
5.4.0-1035.41
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-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 6.12.25-1Fixed in 6.12.27-1
  2. Upgrade

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

    Fixed in 4.4.0-1102.107
  3. Upgrade

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

    Fixed in 4.15.0-1125.138~14.04.1
  4. Upgrade

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

    Fixed in 4.4.0-222.255~14.04.1
  5. Upgrade

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

    Fixed in 4.4.0-222.255
  6. Upgrade

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

    Fixed in 4.4.0-1138.152
  7. Upgrade

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

    Fixed in 4.15.0-1113.120~16.04.1
  8. Upgrade

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

    Fixed in 4.15.0-1125.138~16.04.1
  9. Upgrade

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

    Fixed in 4.15.0-1110.124~16.04.1
  10. Upgrade

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

    Fixed in 4.15.0-161.169~16.04.1
  11. Upgrade

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

    Fixed in 4.4.0-1103.112
  12. Upgrade

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

    Fixed in 4.15.0-1082.90~16.04.1
  13. Upgrade

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

    Fixed in 4.4.0-1072.78
  14. Upgrade

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

    Fixed in 4.15.0-161.169
  15. Upgrade

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

    Fixed in 4.15.0-1114.121
  16. Upgrade

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

    Fixed in 5.4.0-1058.61~18.04.3
  17. Upgrade

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

    Fixed in 4.15.0-1125.138
  18. Upgrade

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

    Fixed in 5.4.0-1062.65~18.04.1
  19. Upgrade

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

    Fixed in 4.15.0-1029.34
  20. Upgrade

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

    Fixed in 4.15.0-1110.124
  21. Upgrade

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

    Fixed in 5.4.0-1056.60~18.04.1
  22. Upgrade

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

    Fixed in 5.4.0-1054.57~18.04.1
  23. Upgrade

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

    Fixed in 5.4.0-1025.26~18.04.1
  24. Upgrade

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

    Fixed in 5.4.0-89.100~18.04.1
  25. Upgrade

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

    Fixed in 4.15.0-1101.103
  26. Upgrade

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

    Fixed in 4.15.0-1082.90
  27. Upgrade

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

    Fixed in 5.4.0-1056.60~18.04.1
  28. Upgrade

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

    Fixed in 5.4.0-1045.49~18.04.1
  29. Upgrade

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

    Fixed in 4.15.0-1097.103
  30. Upgrade

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

    Fixed in 4.15.0-1114.123
  31. Upgrade

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

    Fixed in 4.15.0-2055.57
  32. Upgrade

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

    Fixed in 4.15.0-2037.41
  33. Upgrade

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

    Fixed in 4.15.0-1071.80
  34. Upgrade

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

    Fixed in 4.15.0-2020.22
  35. Upgrade

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

    Fixed in 5.4.0-89.100
  36. Upgrade

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

    Fixed in 5.4.0-1058.61
  37. Upgrade

    Upgrade ubuntu/linux-aws-5.11 to a version that resolves this vulnerability.

    Fixed in 5.11.0-1016.17~20.04.1
  38. Upgrade

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

    Fixed in 5.4.0-1062.65
  39. Upgrade

    Upgrade ubuntu/linux-azure-5.11 to a version that resolves this vulnerability.

    Fixed in 5.11.0-1013.14~20.04.1
  40. Upgrade

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

    Fixed in 5.4.0-1020.23
  41. Upgrade

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

    Fixed in 5.4.0-1056.60
  42. Upgrade

    Upgrade ubuntu/linux-gcp-5.11 to a version that resolves this vulnerability.

    Fixed in 5.11.0-1017.19~20.04.1
  43. Upgrade

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

    Fixed in 5.4.0-1054.57
  44. Upgrade

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

    Fixed in 5.4.0-1025.26
  45. Upgrade

    Upgrade ubuntu/linux-hwe-5.11 to a version that resolves this vulnerability.

    Fixed in 5.11.0-34.36~20.04.1
  46. Upgrade

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

    Fixed in 5.4.0-1006.7
  47. Upgrade

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

    Fixed in 5.4.0-1048.50
  48. Upgrade

    Upgrade ubuntu/linux-oem-5.10 to a version that resolves this vulnerability.

    Fixed in 5.10.0-1038.40
  49. Upgrade

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

    Fixed in 5.4.0-1056.60
  50. Upgrade

    Upgrade ubuntu/linux-oracle-5.11 to a version that resolves this vulnerability.

    Fixed in 5.11.0-1016.17~20.04.1
  51. Upgrade

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

    Fixed in 5.4.0-1045.49
  52. Upgrade

    Upgrade ubuntu/linux-riscv-5.11 to a version that resolves this vulnerability.

    Fixed in 5.11.0-1017.18~20.04.1
  53. Upgrade

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

    Fixed in 5.4.0-1069.73+fips2
  54. Upgrade

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

    Fixed in 5.4.0-1073.76+fips1
  55. Upgrade

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

    Fixed in 5.4.0-1035.41
  56. Upgrade

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

    Fixed in 5.4.0-1067.71~20.04.1
  57. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 5.12.11

Event History

Aug 8, 2021
CVE Published
via MITRE·07:28 PM
Data Sourced
via MITRE·07:28 PM
Description
Data Sourced
via OSV·08:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·08:15 PM
RemedyDescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2021-38198?

CVE-2021-38198 is classified as a high-severity vulnerability due to its potential to lead to security breaches in guest virtual machines.

2

How do I fix CVE-2021-38198?

To mitigate CVE-2021-38198, upgrade your Linux kernel to version 5.12.11 or later, or apply the relevant patches provided by your distribution.

3

Which Linux kernel versions are affected by CVE-2021-38198?

CVE-2021-38198 affects Linux kernel versions prior to 5.12.11.

4

Is CVE-2021-38198 specific to certain Linux distributions?

Yes, CVE-2021-38198 affects various Linux distributions that utilize vulnerable kernel versions, including Debian 9.0.

5

What types of systems are impacted by CVE-2021-38198?

CVE-2021-38198 impacts systems utilizing KVM for virtualization and running affected versions of the Linux kernel.

Company

Resources

Contact

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