CVE-2020-36322: Medium severity Linux Linux kernel vulnerability

Published Dec 10, 2020
·
Updated

A denial of service flaw was found in fusedogetattr in fs/fuse/dir.c in the kernel side of the FUSE filesystem in the Linux kernel. A local user could use this flaw to crash the system.

Other sources

An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka CID-5d069dbe8aaf. fusedogetattr() calls makebadinode() in inappropriate situations, causing a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950.

An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6. fusedogetattr() calls makebadinode() in inappropriate situations, causing a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950.

Reference and upstream patch: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5d069dbe8aaf2a197142558b6fb2978189ba3454

— Red Hat

Affected Software

90 affected componentsFixes available
redhat/kernel-rt<0:3.10.0-1160.53.1.rt56.1193.el7
0:3.10.0-1160.53.1.rt56.1193.el7
redhat/kernel<0:3.10.0-1160.53.1.el7
0:3.10.0-1160.53.1.el7
redhat/kernel<0:4.18.0-305.el8
0:4.18.0-305.el8
redhat/kernel-rt<0:4.18.0-193.71.1.rt13.121.el8_2
0:4.18.0-193.71.1.rt13.121.el8_2
redhat/kernel<0:4.18.0-193.71.1.el8_2
0:4.18.0-193.71.1.el8_2
redhat/linux kernel<5.11
5.11
Linux Linux kernel<5.10.6
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Starwindsoftware Starwind Virtual San=8-14338
ubuntu/linux-aws<4.4.0-1102.107
4.4.0-1102.107
ubuntu/linux-azure<4.15.0-1126.139~14.04.1
4.15.0-1126.139~14.04.1
ubuntu/linux-lts-xenial<4.4.0-222.255~14.04.1
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<4.15.0-1115.122~16.04.1
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<4.4.0-1103.112
4.4.0-1103.112
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<4.4.0-1072.78
4.4.0-1072.78
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<5.4.0-1039.41~18.04.1
5.4.0-1039.41~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1126.139
4.15.0-1126.139
ubuntu/linux-azure-5.4<5.4.0-1041.43~18.04.1
5.4.0-1041.43~18.04.1
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<5.4.0-1038.41~18.04.1
5.4.0-1038.41~18.04.1
ubuntu/linux-gke-5.4<5.4.0-1037.39~18.04.1
5.4.0-1037.39~18.04.1
ubuntu/linux-gkeop-5.4<5.4.0-1011.12~18.04.2
5.4.0-1011.12~18.04.2
ubuntu/linux-hwe-5.4<5.4.0-67.75~18.04.1
5.4.0-67.75~18.04.1
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<5.4.0-1039.42~18.04.1
5.4.0-1039.42~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1030.33~18.04.1
5.4.0-1030.33~18.04.1
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<5.4.0-67.75
5.4.0-67.75
ubuntu/linux-aws<5.4.0-1039.41
5.4.0-1039.41
ubuntu/linux-azure<5.4.0-1041.43
5.4.0-1041.43
ubuntu/linux-gcp<5.4.0-1038.41
5.4.0-1038.41
ubuntu/linux-gke<5.4.0-1037.39
5.4.0-1037.39
ubuntu/linux-gkeop<5.4.0-1011.12
5.4.0-1011.12
ubuntu/linux-hwe-5.8<5.8.0-45.51~20.04.1
5.8.0-45.51~20.04.1
ubuntu/linux-kvm<5.4.0-1034.35
5.4.0-1034.35
ubuntu/linux-oem-5.10<5.10.0-1011.12
5.10.0-1011.12
ubuntu/linux-oracle<5.4.0-1039.42
5.4.0-1039.42
ubuntu/linux-raspi<5.4.0-1030.33
5.4.0-1030.33
ubuntu/linux-riscv-5.8<5.8.0-18.20~20.04.1
5.8.0-18.20~20.04.1
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*
debian/linux
6.1.176-16.1.190-16.12.107-16.12.116-17.2.15-17.3.4-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 0:3.10.0-1160.53.1.rt56.1193.el7
  2. Upgrade

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

    Fixed in 0:3.10.0-1160.53.1.el7
  3. Upgrade

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

    Fixed in 0:4.18.0-305.el8
  4. Upgrade

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

    Fixed in 0:4.18.0-193.71.1.rt13.121.el8_2
  5. Upgrade

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

    Fixed in 0:4.18.0-193.71.1.el8_2
  6. Upgrade

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

    Fixed in 5.11
  7. Upgrade

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

    Fixed in 4.4.0-1102.107
  8. Upgrade

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

    Fixed in 4.15.0-1126.139~14.04.1
  9. Upgrade

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

    Fixed in 4.4.0-222.255~14.04.1
  10. Upgrade

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

    Fixed in 4.4.0-222.255
  11. Upgrade

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

    Fixed in 4.4.0-1138.152
  12. Upgrade

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

    Fixed in 4.15.0-1115.122~16.04.1
  13. Upgrade

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

    Fixed in 4.15.0-1126.139~16.04.1
  14. Upgrade

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

    Fixed in 4.15.0-1111.125~16.04.1
  15. Upgrade

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

    Fixed in 4.15.0-162.170~16.04.1
  16. Upgrade

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

    Fixed in 4.4.0-1103.112
  17. Upgrade

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

    Fixed in 4.15.0-1083.91~16.04.1
  18. Upgrade

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

    Fixed in 4.4.0-1072.78
  19. Upgrade

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

    Fixed in 4.15.0-162.170
  20. Upgrade

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

    Fixed in 4.15.0-1115.122
  21. Upgrade

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

    Fixed in 5.4.0-1039.41~18.04.1
  22. Upgrade

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

    Fixed in 4.15.0-1126.139
  23. Upgrade

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

    Fixed in 5.4.0-1041.43~18.04.1
  24. Upgrade

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

    Fixed in 4.15.0-1030.35
  25. Upgrade

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

    Fixed in 4.15.0-1111.125
  26. Upgrade

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

    Fixed in 5.4.0-1038.41~18.04.1
  27. Upgrade

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

    Fixed in 5.4.0-1037.39~18.04.1
  28. Upgrade

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

    Fixed in 5.4.0-1011.12~18.04.2
  29. Upgrade

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

    Fixed in 5.4.0-67.75~18.04.1
  30. Upgrade

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

    Fixed in 4.15.0-1102.104
  31. Upgrade

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

    Fixed in 4.15.0-1083.91
  32. Upgrade

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

    Fixed in 5.4.0-1039.42~18.04.1
  33. Upgrade

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

    Fixed in 5.4.0-1030.33~18.04.1
  34. Upgrade

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

    Fixed in 4.15.0-1098.104
  35. Upgrade

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

    Fixed in 4.15.0-1115.124
  36. Upgrade

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

    Fixed in 4.15.0-2056.58
  37. Upgrade

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

    Fixed in 4.15.0-2038.42
  38. Upgrade

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

    Fixed in 4.15.0-1072.81
  39. Upgrade

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

    Fixed in 4.15.0-2021.23
  40. Upgrade

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

    Fixed in 5.4.0-67.75
  41. Upgrade

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

    Fixed in 5.4.0-1039.41
  42. Upgrade

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

    Fixed in 5.4.0-1041.43
  43. Upgrade

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

    Fixed in 5.4.0-1038.41
  44. Upgrade

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

    Fixed in 5.4.0-1037.39
  45. Upgrade

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

    Fixed in 5.4.0-1011.12
  46. Upgrade

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

    Fixed in 5.8.0-45.51~20.04.1
  47. Upgrade

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

    Fixed in 5.4.0-1034.35
  48. Upgrade

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

    Fixed in 5.10.0-1011.12
  49. Upgrade

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

    Fixed in 5.4.0-1039.42
  50. Upgrade

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

    Fixed in 5.4.0-1030.33
  51. Upgrade

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

    Fixed in 5.8.0-18.20~20.04.1
  52. Upgrade

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

    Fixed in 5.4.0-1069.73+fips2
  53. Upgrade

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

    Fixed in 5.4.0-1073.76+fips1
  54. Upgrade

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

    Fixed in 5.4.0-1067.71~20.04.1
  55. 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 7.3.4-1
  56. Upgrade

    Upgrade Linux kernel to a version that resolves this vulnerability.

    Fixed in 5.10.6
  57. Configuration

    Add `install fuse /bin/true` to `/etc/modprobe.d/disable-fuse.conf` to prevent the FUSE module from loading. Do not use this mitigation if the system requires FUSE.

    FUSE kernel module install fuse = /bin/true
  58. Operational

    Restart the system if the FUSE modules are currently loaded.

Event History

Dec 10, 2020
CVE Published
12:00 AM
Apr 14, 2021
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via OSV·06:15 AM
DescriptionSeverityAffected Software

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-2020-36322?

CVE-2020-36322 has been classified as a denial of service vulnerability that can lead to system crashes.

2

How do I fix CVE-2020-36322?

To fix CVE-2020-36322, update the Linux kernel to versions 5.10.6 or later, or apply the relevant patches for your distribution.

3

Which versions of Linux are affected by CVE-2020-36322?

CVE-2020-36322 affects Linux kernel versions prior to 5.10.6, including specific versions of Red Hat and Debian kernels.

4

Can a local user exploit CVE-2020-36322?

Yes, a local user can exploit CVE-2020-36322 to crash the system and cause a denial of service.

5

Is CVE-2020-36322 fixed in the latest Linux kernels?

Yes, CVE-2020-36322 is resolved in Linux kernel versions 5.10.6 and higher.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203