CVE-2020-25669: Use After Free

Published May 26, 2021
·
Updated

A vulnerability was found in the Linux Kernel where the function sunkbdreinit having been scheduled by sunkbdinterrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbddisconnect, there is still an alias in sunkbdreinit causing Use After Free.

Affected Software

123 affected componentsFixes available
Linux Linux kernel<4.4.245
Linux Linux kernel>=4.5<4.9.245
Linux Linux kernel>=4.10<4.14.208
Linux Linux kernel>=4.15<4.19.159
Linux Linux kernel>=4.20<5.4.79
Linux Linux kernel>=5.5<5.9.10
Debian Debian Linux=9.0
NetApp Cloud Backup
NetApp Solidfire \& Hci Management Node
NetApp Solidfire Baseboard Management Controller
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 H300e Firmware
NetApp H300e
All of the following
NetApp H500e Firmware
NetApp H500e
All of the following
NetApp H700e Firmware
NetApp H700e
All of the following
NetApp H410s Firmware
NetApp H410s
All of the following
NetApp H410c Firmware
NetApp H410c
NetApp H300s Firmware
NetApp H300s
NetApp H500s Firmware
NetApp H500s
NetApp H700s Firmware
NetApp H700s
NetApp H300e Firmware
NetApp H300e
NetApp H500e Firmware
NetApp H500e
NetApp H700e Firmware
NetApp H700e
NetApp H410s Firmware
NetApp H410s
NetApp H410c Firmware
NetApp H410c
debian/linux
5.10.223-15.10.234-16.1.129-16.1.135-16.12.22-16.12.25-1
ubuntu/linux-aws<4.4.0-1085.89
4.4.0-1085.89
ubuntu/linux-azure<4.15.0-1108.120~14.04.1
4.15.0-1108.120~14.04.1
ubuntu/linux-lts-xenial<4.4.0-201.233~14.04.1
4.4.0-201.233~14.04.1
ubuntu/linux*
ubuntu/linux<4.4.0-201.233
4.4.0-201.233
ubuntu/linux-aws<4.4.0-1121.135
4.4.0-1121.135
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-kvm<4.4.0-1087.96
4.4.0-1087.96
ubuntu/linux-oracle<4.15.0-1065.73~16.04.1
4.15.0-1065.73~16.04.1
ubuntu/linux-raspi2<4.4.0-1145.155
4.4.0-1145.155
ubuntu/linux-snapdragon<4.4.0-1149.159
4.4.0-1149.159
ubuntu/linux-hwe-edge*
ubuntu/linux-fips<4.4.0-1055.61
4.4.0-1055.61
ubuntu/linux-fips*
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-oem-5.6<5.6.0-1053.57
5.6.0-1053.57
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-azure-fde-5.15<5.15.0-1114.123~20.04.1
5.15.0-1114.123~20.04.1
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-aws to a version that resolves this vulnerability.

    Fixed in 4.4.0-1085.89
  3. Upgrade

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

    Fixed in 4.15.0-1108.120~14.04.1
  4. Upgrade

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

    Fixed in 4.4.0-201.233~14.04.1
  5. Upgrade

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

    Fixed in 4.4.0-201.233
  6. Upgrade

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

    Fixed in 4.4.0-1121.135
  7. Upgrade

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

    Fixed in 4.15.0-1094.101~16.04.1
  8. Upgrade

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

    Fixed in 4.15.0-1108.120~16.04.1
  9. Upgrade

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

    Fixed in 4.15.0-1093.106~16.04.1
  10. Upgrade

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

    Fixed in 4.15.0-136.140~16.04.1
  11. Upgrade

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

    Fixed in 4.4.0-1087.96
  12. Upgrade

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

    Fixed in 4.15.0-1065.73~16.04.1
  13. Upgrade

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

    Fixed in 4.4.0-1145.155
  14. Upgrade

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

    Fixed in 4.4.0-1149.159
  15. Upgrade

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

    Fixed in 4.4.0-1055.61
  16. Upgrade

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

    Fixed in 4.15.0-136.140
  17. Upgrade

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

    Fixed in 4.15.0-1094.101
  18. Upgrade

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

    Fixed in 5.4.0-1038.40~18.04.1
  19. Upgrade

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

    Fixed in 4.15.0-1108.120
  20. Upgrade

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

    Fixed in 5.4.0-1040.42~18.04.1
  21. Upgrade

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

    Fixed in 4.15.0-1012.16
  22. Upgrade

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

    Fixed in 4.15.0-1093.106
  23. Upgrade

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

    Fixed in 5.4.0-1037.40~18.04.1
  24. Upgrade

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

    Fixed in 4.15.0-1079.84
  25. Upgrade

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

    Fixed in 5.4.0-1036.38~18.04.1
  26. Upgrade

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

    Fixed in 5.4.0-1010.11~18.04.1
  27. Upgrade

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

    Fixed in 5.4.0-66.74~18.04.2
  28. Upgrade

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

    Fixed in 4.15.0-1085.87
  29. Upgrade

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

    Fixed in 4.15.0-1065.73
  30. Upgrade

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

    Fixed in 5.4.0-1038.41~18.04.1
  31. Upgrade

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

    Fixed in 5.4.0-1029.32~18.04.1
  32. Upgrade

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

    Fixed in 4.15.0-1079.84
  33. Upgrade

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

    Fixed in 4.15.0-1096.105
  34. Upgrade

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

    Fixed in 4.15.0-2037.39
  35. Upgrade

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

    Fixed in 4.15.0-2020.23
  36. Upgrade

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

    Fixed in 4.15.0-1053.61
  37. Upgrade

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

    Fixed in 5.4.0-66.74
  38. Upgrade

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

    Fixed in 5.4.0-1038.40
  39. Upgrade

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

    Fixed in 5.4.0-1040.42
  40. Upgrade

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

    Fixed in 5.4.0-1037.40
  41. Upgrade

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

    Fixed in 5.4.0-1036.38
  42. Upgrade

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

    Fixed in 5.4.0-1010.11
  43. Upgrade

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

    Fixed in 5.8.0-44.50~20.04.1
  44. Upgrade

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

    Fixed in 5.4.0-1033.34
  45. Upgrade

    Upgrade ubuntu/linux-oem-5.6 to a version that resolves this vulnerability.

    Fixed in 5.6.0-1053.57
  46. Upgrade

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

    Fixed in 5.4.0-1038.41
  47. Upgrade

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

    Fixed in 5.4.0-1029.32
  48. Upgrade

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

    Fixed in 5.8.0-17.19~20.04.1
  49. Upgrade

    Upgrade ubuntu/linux-azure-fde-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1114.123~20.04.1
  50. Upgrade

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

    Fixed in 5.4.0-1069.73+fips2
  51. Upgrade

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

    Fixed in 5.4.0-1073.76+fips1
  52. 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 5, 2020
CVE Published
via OSV·12:00 AM
Data Sourced
via OSV·12:00 AM
DescriptionSeverityAffected Software
May 26, 2021
CVE Published
via MITRE·11:25 AM
Data Sourced
via MITRE·11:25 AM
DescriptionWeakness

Frequently Asked Questions

1

What is the severity of CVE-2020-25669?

CVE-2020-25669 has been assigned a medium severity rating due to the potential for a Use After Free vulnerability affecting the Linux Kernel.

2

How do I fix CVE-2020-25669?

To fix CVE-2020-25669, you should upgrade the Linux Kernel to version 5.10.223-1 or later.

3

Which versions of the Linux Kernel are affected by CVE-2020-25669?

CVE-2020-25669 affects Linux Kernel versions between 4.4.0 and 5.4.x and several other specific range versions.

4

What systems are impacted by CVE-2020-25669?

CVE-2020-25669 impacts various Linux distributions, including Debian Linux and may affect systems running specific NetApp firmware.

5

What type of vulnerability is CVE-2020-25669?

CVE-2020-25669 is classified as a Use After Free vulnerability, which can potentially lead to unauthorized access or system crashes.

Company

Resources

Contact

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