CVE-2021-3753: Race Condition

Published Aug 31, 2021
·
Updated

A race problem was seen in the vtkioctl in drivers/tty/vt/vtioctl.c in the Linux kernel, which may cause an out of bounds read in vt as the write access to vcmode is not protected by lock-in vtioctl (KDSETMDE). The highest threat from this vulnerability is to data confidentiality.

Other sources

Linux Kernel could allow a local attacker to obtain sensitive information, caused by an out-of-bounds read flaw in VT. By using a specially-crafted vcvisibleorigin setting, an attacker could exploit this vulnerability to obtain sensitive information, or cause a denial of service condition.

— IBM

Affected Software

132 affected componentsFixes available
Linux Linux kernel<5.15
redhat Enterprise Linux=7.0
redhat Enterprise Linux=8.0
NetApp Active Iq Unified Manager Vmware Vsphere
NetApp Element Software
NetApp Hci Management Node
NetApp Solidfire
NetApp Bootstrap Os
NetApp Hci Compute Node
NetApp H300s Firmware
NetApp H300s
NetApp H500s Firmware
NetApp H500s
NetApp H700s Firmware
NetApp H700s
NetApp H410s Firmware
NetApp H410s
NetApp H410c Firmware
NetApp H410c
All of the following
NetApp Bootstrap Os
NetApp Hci Compute Node
All of the following
NetApp H300s Firmware
NetApp H300s
All of the following
NetApp H500s Firmware
NetApp H500s
All of the following
NetApp H700s Firmware
NetApp H700s
All of the following
NetApp H410s Firmware
NetApp H410s
All of the following
NetApp H410c Firmware
NetApp H410c
IBM Security Verify Governance<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Software Stack<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Virtual Appliance<=ISVG 10.0.2
IBM Security Verify Governance Identity Manager Container<=ISVG 10.0.2
redhat/linux kernel<5.15
5.15
ubuntu/linux-aws<4.4.0-1120.126
4.4.0-1120.126
ubuntu/linux-azure<4.15.0-1126.139~14.04.1
4.15.0-1126.139~14.04.1
ubuntu/linux-lts-xenial<4.4.0-242.276~14.04.1
4.4.0-242.276~14.04.1
ubuntu/linux*
ubuntu/linux<4.4.0-242.276
4.4.0-242.276
ubuntu/linux-aws<4.4.0-1158.173
4.4.0-1158.173
ubuntu/linux-aws-hwe<4.15.0-1115.122~16.04.1
4.15.0-1115.122~16.04.1
ubuntu/linux-azure<4.15.0-1126.139~16.04.1
4.15.0-1126.139~16.04.1
ubuntu/linux-gcp<4.15.0-1111.125~16.04.1
4.15.0-1111.125~16.04.1
ubuntu/linux-hwe<4.15.0-162.170~16.04.1
4.15.0-162.170~16.04.1
ubuntu/linux-kvm<4.4.0-1121.131
4.4.0-1121.131
ubuntu/linux-oracle<4.15.0-1083.91~16.04.1
4.15.0-1083.91~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux-fips<4.4.0-1090.97
4.4.0-1090.97
ubuntu/linux-fips*
ubuntu/linux<4.15.0-162.170
4.15.0-162.170
ubuntu/linux-aws<4.15.0-1115.122
4.15.0-1115.122
ubuntu/linux-aws-5.4<5.4.0-1059.62~18.04.1
5.4.0-1059.62~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1126.139
4.15.0-1126.139
ubuntu/linux-azure-5.4<5.4.0-1063.66~18.04.1
5.4.0-1063.66~18.04.1
ubuntu/linux-dell300x<4.15.0-1030.35
4.15.0-1030.35
ubuntu/linux-gcp-4.15<4.15.0-1111.125
4.15.0-1111.125
ubuntu/linux-gcp-5.4<5.4.0-1057.61~18.04.1
5.4.0-1057.61~18.04.1
ubuntu/linux-gke-5.4<5.4.0-1055.58~18.04.1
5.4.0-1055.58~18.04.1
ubuntu/linux-gkeop-5.4<5.4.0-1026.27~18.04.1
5.4.0-1026.27~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-90.101~18.04.1
5.4.0-90.101~18.04.1
ubuntu/linux-kvm<4.15.0-1102.104
4.15.0-1102.104
ubuntu/linux-oracle<4.15.0-1083.91
4.15.0-1083.91
ubuntu/linux-oracle-5.4<5.4.0-1057.61~18.04.1
5.4.0-1057.61~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1046.50~18.04.1
5.4.0-1046.50~18.04.1
ubuntu/linux-raspi2<4.15.0-1098.104
4.15.0-1098.104
ubuntu/linux-snapdragon<4.15.0-1115.124
4.15.0-1115.124
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<4.15.0-2056.58
4.15.0-2056.58
ubuntu/linux-azure-fips<4.15.0-2038.42
4.15.0-2038.42
ubuntu/linux-fips<4.15.0-1072.81
4.15.0-1072.81
ubuntu/linux-gcp-fips<4.15.0-2021.23
4.15.0-2021.23
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-90.101
5.4.0-90.101
ubuntu/linux-aws<5.4.0-1059.62
5.4.0-1059.62
ubuntu/linux-aws-5.11<5.11.0-1020.21~20.04.2
5.11.0-1020.21~20.04.2
ubuntu/linux-azure<5.4.0-1063.66
5.4.0-1063.66
ubuntu/linux-azure-5.11<5.11.0-1020.21~20.04.1
5.11.0-1020.21~20.04.1
ubuntu/linux-bluefield<5.4.0-1021.24
5.4.0-1021.24
ubuntu/linux-gcp<5.4.0-1057.61
5.4.0-1057.61
ubuntu/linux-gcp-5.11<5.11.0-1021.23~20.04.1
5.11.0-1021.23~20.04.1
ubuntu/linux-gke<5.4.0-1055.58
5.4.0-1055.58
ubuntu/linux-gkeop<5.4.0-1026.27
5.4.0-1026.27
ubuntu/linux-hwe-5.11<5.11.0-38.42~20.04.1
5.11.0-38.42~20.04.1
ubuntu/linux-ibm<5.4.0-1007.8
5.4.0-1007.8
ubuntu/linux-kvm<5.4.0-1049.51
5.4.0-1049.51
ubuntu/linux-oem-5.10<5.10.0-1050.52
5.10.0-1050.52
ubuntu/linux-oem-5.13<5.13.0-1017.21
5.13.0-1017.21
ubuntu/linux-oracle<5.4.0-1057.61
5.4.0-1057.61
ubuntu/linux-oracle-5.11<5.11.0-1020.21~20.04.1
5.11.0-1020.21~20.04.1
ubuntu/linux-raspi<5.4.0-1046.50
5.4.0-1046.50
ubuntu/linux-riscv-5.11<5.11.0-1021.22~20.04.1
5.11.0-1021.22~20.04.1
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.8*
ubuntu/linux-gcp-5.8*
ubuntu/linux-hwe-5.8*
ubuntu/linux-intel-5.13*
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<5.4.0-1036.42
5.4.0-1036.42
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*
android/:linux_kernel:>=:0<:2022-06-05
:2022-06-05
debian/linux
6.1.176-16.1.190-16.12.107-16.12.116-17.2.15-17.3.3-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/Linux kernel to a version that resolves this vulnerability.

    Fixed in 5.15
  2. Upgrade

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

    Fixed in 4.4.0-1120.126
  3. Upgrade

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

    Fixed in 4.15.0-1126.139~14.04.1
  4. Upgrade

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

    Fixed in 4.4.0-242.276~14.04.1
  5. Upgrade

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

    Fixed in 4.4.0-242.276
  6. Upgrade

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

    Fixed in 4.4.0-1158.173
  7. Upgrade

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

    Fixed in 4.15.0-1115.122~16.04.1
  8. Upgrade

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

    Fixed in 4.15.0-1126.139~16.04.1
  9. Upgrade

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

    Fixed in 4.15.0-1111.125~16.04.1
  10. Upgrade

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

    Fixed in 4.15.0-162.170~16.04.1
  11. Upgrade

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

    Fixed in 4.4.0-1121.131
  12. Upgrade

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

    Fixed in 4.15.0-1083.91~16.04.1
  13. Upgrade

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

    Fixed in 4.4.0-1090.97
  14. Upgrade

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

    Fixed in 4.15.0-162.170
  15. Upgrade

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

    Fixed in 4.15.0-1115.122
  16. Upgrade

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

    Fixed in 5.4.0-1059.62~18.04.1
  17. Upgrade

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

    Fixed in 4.15.0-1126.139
  18. Upgrade

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

    Fixed in 5.4.0-1063.66~18.04.1
  19. Upgrade

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

    Fixed in 4.15.0-1030.35
  20. Upgrade

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

    Fixed in 4.15.0-1111.125
  21. Upgrade

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

    Fixed in 5.4.0-1057.61~18.04.1
  22. Upgrade

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

    Fixed in 5.4.0-1055.58~18.04.1
  23. Upgrade

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

    Fixed in 5.4.0-1026.27~18.04.1
  24. Upgrade

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

    Fixed in 5.4.0-90.101~18.04.1
  25. Upgrade

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

    Fixed in 4.15.0-1102.104
  26. Upgrade

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

    Fixed in 4.15.0-1083.91
  27. Upgrade

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

    Fixed in 5.4.0-1057.61~18.04.1
  28. Upgrade

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

    Fixed in 5.4.0-1046.50~18.04.1
  29. Upgrade

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

    Fixed in 4.15.0-1098.104
  30. Upgrade

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

    Fixed in 4.15.0-1115.124
  31. Upgrade

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

    Fixed in 4.15.0-2056.58
  32. Upgrade

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

    Fixed in 4.15.0-2038.42
  33. Upgrade

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

    Fixed in 4.15.0-1072.81
  34. Upgrade

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

    Fixed in 4.15.0-2021.23
  35. Upgrade

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

    Fixed in 5.4.0-90.101
  36. Upgrade

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

    Fixed in 5.4.0-1059.62
  37. Upgrade

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

    Fixed in 5.11.0-1020.21~20.04.2
  38. Upgrade

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

    Fixed in 5.4.0-1063.66
  39. Upgrade

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

    Fixed in 5.11.0-1020.21~20.04.1
  40. Upgrade

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

    Fixed in 5.4.0-1021.24
  41. Upgrade

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

    Fixed in 5.4.0-1057.61
  42. Upgrade

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

    Fixed in 5.11.0-1021.23~20.04.1
  43. Upgrade

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

    Fixed in 5.4.0-1055.58
  44. Upgrade

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

    Fixed in 5.4.0-1026.27
  45. Upgrade

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

    Fixed in 5.11.0-38.42~20.04.1
  46. Upgrade

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

    Fixed in 5.4.0-1007.8
  47. Upgrade

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

    Fixed in 5.4.0-1049.51
  48. Upgrade

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

    Fixed in 5.10.0-1050.52
  49. Upgrade

    Upgrade ubuntu/linux-oem-5.13 to a version that resolves this vulnerability.

    Fixed in 5.13.0-1017.21
  50. Upgrade

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

    Fixed in 5.4.0-1057.61
  51. Upgrade

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

    Fixed in 5.11.0-1020.21~20.04.1
  52. Upgrade

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

    Fixed in 5.4.0-1046.50
  53. Upgrade

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

    Fixed in 5.11.0-1021.22~20.04.1
  54. Upgrade

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

    Fixed in 5.4.0-1069.73+fips2
  55. Upgrade

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

    Fixed in 5.4.0-1073.76+fips1
  56. Upgrade

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

    Fixed in 5.4.0-1036.42
  57. Upgrade

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

    Fixed in 5.4.0-1067.71~20.04.1
  58. Upgrade

    Upgrade android/:linux_kernel: to a version that resolves this vulnerability.

    Fixed in :2022-06-05
  59. Upgrade

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

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.116-1Fixed in 7.2.15-1Fixed in 7.3.3-1

Event History

Aug 31, 2021
Data Sourced
via Red Hat·11:42 AM
DescriptionSeverityAffected Software
Sep 2, 2021
CVE Published
via OSV·12:00 AM
Data Sourced
via OSV·12:00 AM
DescriptionSeverityAffected Software
Feb 16, 2022
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionWeakness
Jun 1, 2022
Advisory Published
via OSV·12:00 AM

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2021-3753?

The severity of CVE-2021-3753 is considered high due to its impact on data confidentiality.

2

How do I fix CVE-2021-3753?

To fix CVE-2021-3753, update your Linux kernel to version 5.15 or apply the recommended patches for versions 5.10.223-1, 5.10.226-1, 6.1.123-1, 6.1.119-1, 6.12.11-1, or 6.12.12-1.

3

What systems are affected by CVE-2021-3753?

CVE-2021-3753 affects various versions of the Linux kernel, including specific Red Hat Enterprise Linux and Debian packages.

4

What type of vulnerability is CVE-2021-3753?

CVE-2021-3753 is a race condition vulnerability that can lead to out of bounds reading in the Linux kernel.

5

What are the potential consequences of CVE-2021-3753?

The consequences of CVE-2021-3753 include potential unauthorized access to sensitive data due to compromised data confidentiality.

Company

Resources

Contact

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