CVE-2021-3564: Double Free

Published May 24, 2021
·
Updated

A flaw double-free memory corruption in the Linux kernel HCI device initialization subsystem was found in the way user attach malicious HCI TTY Bluetooth device. A local user could use this flaw to crash the system.

Other sources

A flaw was found in the Linux kernel in the BlueTooth subsystem when the HCI device initialization fails. It can lead to unexpected results, like double-free memory corruption vulnerability.

— Red Hat

Affected Software

101 affected componentsFixes available
redhat/kernel-rt<0:3.10.0-1160.59.1.rt56.1200.el7
0:3.10.0-1160.59.1.rt56.1200.el7
redhat/kernel<0:3.10.0-1160.59.1.el7
0:3.10.0-1160.59.1.el7
redhat/kernel-rt<0:4.18.0-348.rt7.130.el8
0:4.18.0-348.rt7.130.el8
redhat/kernel<0:4.18.0-348.el8
0:4.18.0-348.el8
Linux Linux kernel>=3.13
Fedoraproject Fedora=34
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<4.4.0-1099.104
4.4.0-1099.104
ubuntu/linux-azure<4.15.0-1122.135~14.04.1
4.15.0-1122.135~14.04.1
ubuntu/linux-lts-xenial<4.4.0-219.252~14.04.1
4.4.0-219.252~14.04.1
ubuntu/linux*
ubuntu/linux<4.4.0-219.252
4.4.0-219.252
ubuntu/linux-aws<4.4.0-1135.149
4.4.0-1135.149
ubuntu/linux-aws-hwe<4.15.0-1110.117~16.04.1
4.15.0-1110.117~16.04.1
ubuntu/linux-azure<4.15.0-1122.135~16.04.1
4.15.0-1122.135~16.04.1
ubuntu/linux-gcp<4.15.0-1107.121~16.04.1
4.15.0-1107.121~16.04.1
ubuntu/linux-hwe<4.15.0-154.161~16.04.1
4.15.0-154.161~16.04.1
ubuntu/linux-kvm<4.4.0-1100.109
4.4.0-1100.109
ubuntu/linux-oracle<4.15.0-1079.87~16.04.1
4.15.0-1079.87~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux-fips<4.4.0-1069.75
4.4.0-1069.75
ubuntu/linux-fips*
ubuntu/linux<4.15.0-154.161
4.15.0-154.161
ubuntu/linux-aws<4.15.0-1110.117
4.15.0-1110.117
ubuntu/linux-aws-5.4<5.4.0-1055.58~18.04.1
5.4.0-1055.58~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1122.135
4.15.0-1122.135
ubuntu/linux-azure-5.4<5.4.0-1056.58~18.04.1
5.4.0-1056.58~18.04.1
ubuntu/linux-dell300x<4.15.0-1027.32
4.15.0-1027.32
ubuntu/linux-gcp-4.15<4.15.0-1107.121
4.15.0-1107.121
ubuntu/linux-gcp-5.4<5.4.0-1051.55~18.04.1
5.4.0-1051.55~18.04.1
ubuntu/linux-gke-5.4<5.4.0-1051.54~18.04.1
5.4.0-1051.54~18.04.1
ubuntu/linux-gkeop-5.4<5.4.0-1022.23~18.04.1
5.4.0-1022.23~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-81.91~18.04.1
5.4.0-81.91~18.04.1
ubuntu/linux-kvm<4.15.0-1098.100
4.15.0-1098.100
ubuntu/linux-oracle<4.15.0-1079.87
4.15.0-1079.87
ubuntu/linux-oracle-5.4<5.4.0-1053.57~18.04.1
5.4.0-1053.57~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1042.46~18.04.3
5.4.0-1042.46~18.04.3
ubuntu/linux-raspi2<4.15.0-1094.100
4.15.0-1094.100
ubuntu/linux-snapdragon<4.15.0-1111.120
4.15.0-1111.120
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<4.15.0-2052.54
4.15.0-2052.54
ubuntu/linux-azure-fips<4.15.0-2034.38
4.15.0-2034.38
ubuntu/linux-fips<4.15.0-1068.77
4.15.0-1068.77
ubuntu/linux-gcp-fips<4.15.0-2017.19
4.15.0-2017.19
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-81.91
5.4.0-81.91
ubuntu/linux-aws<5.4.0-1055.58
5.4.0-1055.58
ubuntu/linux-aws-5.11<5.11.0-1016.17~20.04.1
5.11.0-1016.17~20.04.1
ubuntu/linux-aws-5.8<5.8.0-1042.44~20.04.1
5.8.0-1042.44~20.04.1
ubuntu/linux-azure<5.4.0-1056.58
5.4.0-1056.58
ubuntu/linux-azure-5.11<5.11.0-1013.14~20.04.1
5.11.0-1013.14~20.04.1
ubuntu/linux-azure-5.8<5.8.0-1040.43~20.04.1
5.8.0-1040.43~20.04.1
ubuntu/linux-bluefield<5.4.0-1019.22
5.4.0-1019.22
ubuntu/linux-gcp<5.4.0-1051.55
5.4.0-1051.55
ubuntu/linux-gcp-5.11<5.11.0-1017.19~20.04.1
5.11.0-1017.19~20.04.1
ubuntu/linux-gcp-5.8<5.8.0-1039.41
5.8.0-1039.41
ubuntu/linux-gke<5.4.0-1051.54
5.4.0-1051.54
ubuntu/linux-gkeop<5.4.0-1022.23
5.4.0-1022.23
ubuntu/linux-hwe-5.11<5.11.0-34.36~20.04.1
5.11.0-34.36~20.04.1
ubuntu/linux-kvm<5.4.0-1045.47
5.4.0-1045.47
ubuntu/linux-oem-5.10<5.10.0-1038.40
5.10.0-1038.40
ubuntu/linux-oracle<5.4.0-1053.57
5.4.0-1053.57
ubuntu/linux-oracle-5.11<5.11.0-1016.17~20.04.1
5.11.0-1016.17~20.04.1
ubuntu/linux-oracle-5.8<5.8.0-1038.39~20.04.1
5.8.0-1038.39~20.04.1
ubuntu/linux-raspi<5.4.0-1042.46
5.4.0-1042.46
ubuntu/linux-riscv-5.11<5.11.0-1017.18~20.04.1
5.11.0-1017.18~20.04.1
ubuntu/linux-azure-fde-5.15<5.15.0-1114.123~20.04.1
5.15.0-1114.123~20.04.1
ubuntu/linux-hwe-5.8*
ubuntu/linux-oem-5.6*
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<5.4.0-1032.37
5.4.0-1032.37
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 redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1160.59.1.rt56.1200.el7
  2. Upgrade

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

    Fixed in 0:3.10.0-1160.59.1.el7
  3. Upgrade

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

    Fixed in 0:4.18.0-348.rt7.130.el8
  4. Upgrade

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

    Fixed in 0:4.18.0-348.el8
  5. 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
  6. Upgrade

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

    Fixed in 4.4.0-1099.104
  7. Upgrade

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

    Fixed in 4.15.0-1122.135~14.04.1
  8. Upgrade

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

    Fixed in 4.4.0-219.252~14.04.1
  9. Upgrade

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

    Fixed in 4.4.0-219.252
  10. Upgrade

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

    Fixed in 4.4.0-1135.149
  11. Upgrade

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

    Fixed in 4.15.0-1110.117~16.04.1
  12. Upgrade

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

    Fixed in 4.15.0-1122.135~16.04.1
  13. Upgrade

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

    Fixed in 4.15.0-1107.121~16.04.1
  14. Upgrade

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

    Fixed in 4.15.0-154.161~16.04.1
  15. Upgrade

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

    Fixed in 4.4.0-1100.109
  16. Upgrade

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

    Fixed in 4.15.0-1079.87~16.04.1
  17. Upgrade

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

    Fixed in 4.4.0-1069.75
  18. Upgrade

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

    Fixed in 4.15.0-154.161
  19. Upgrade

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

    Fixed in 4.15.0-1110.117
  20. Upgrade

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

    Fixed in 5.4.0-1055.58~18.04.1
  21. Upgrade

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

    Fixed in 4.15.0-1122.135
  22. Upgrade

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

    Fixed in 5.4.0-1056.58~18.04.1
  23. Upgrade

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

    Fixed in 4.15.0-1027.32
  24. Upgrade

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

    Fixed in 4.15.0-1107.121
  25. Upgrade

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

    Fixed in 5.4.0-1051.55~18.04.1
  26. Upgrade

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

    Fixed in 5.4.0-1051.54~18.04.1
  27. Upgrade

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

    Fixed in 5.4.0-1022.23~18.04.1
  28. Upgrade

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

    Fixed in 5.4.0-81.91~18.04.1
  29. Upgrade

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

    Fixed in 4.15.0-1098.100
  30. Upgrade

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

    Fixed in 4.15.0-1079.87
  31. Upgrade

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

    Fixed in 5.4.0-1053.57~18.04.1
  32. Upgrade

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

    Fixed in 5.4.0-1042.46~18.04.3
  33. Upgrade

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

    Fixed in 4.15.0-1094.100
  34. Upgrade

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

    Fixed in 4.15.0-1111.120
  35. Upgrade

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

    Fixed in 4.15.0-2052.54
  36. Upgrade

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

    Fixed in 4.15.0-2034.38
  37. Upgrade

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

    Fixed in 4.15.0-1068.77
  38. Upgrade

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

    Fixed in 4.15.0-2017.19
  39. Upgrade

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

    Fixed in 5.4.0-81.91
  40. Upgrade

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

    Fixed in 5.4.0-1055.58
  41. Upgrade

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

    Fixed in 5.11.0-1016.17~20.04.1
  42. Upgrade

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

    Fixed in 5.8.0-1042.44~20.04.1
  43. Upgrade

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

    Fixed in 5.4.0-1056.58
  44. Upgrade

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

    Fixed in 5.11.0-1013.14~20.04.1
  45. Upgrade

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

    Fixed in 5.8.0-1040.43~20.04.1
  46. Upgrade

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

    Fixed in 5.4.0-1019.22
  47. Upgrade

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

    Fixed in 5.4.0-1051.55
  48. Upgrade

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

    Fixed in 5.11.0-1017.19~20.04.1
  49. Upgrade

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

    Fixed in 5.8.0-1039.41
  50. Upgrade

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

    Fixed in 5.4.0-1051.54
  51. Upgrade

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

    Fixed in 5.4.0-1022.23
  52. Upgrade

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

    Fixed in 5.11.0-34.36~20.04.1
  53. Upgrade

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

    Fixed in 5.4.0-1045.47
  54. Upgrade

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

    Fixed in 5.10.0-1038.40
  55. Upgrade

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

    Fixed in 5.4.0-1053.57
  56. Upgrade

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

    Fixed in 5.11.0-1016.17~20.04.1
  57. Upgrade

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

    Fixed in 5.8.0-1038.39~20.04.1
  58. Upgrade

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

    Fixed in 5.4.0-1042.46
  59. Upgrade

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

    Fixed in 5.11.0-1017.18~20.04.1
  60. 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
  61. Upgrade

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

    Fixed in 5.4.0-1069.73+fips2
  62. Upgrade

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

    Fixed in 5.4.0-1073.76+fips1
  63. Upgrade

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

    Fixed in 5.4.0-1032.37
  64. 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

May 24, 2021
Data Sourced
via Red Hat·07:31 PM
DescriptionSeverityAffected Software
May 25, 2021
CVE Published
12:00 AM
Jun 8, 2021
CVE Published
via MITRE·11:59 AM
Data Sourced
via MITRE·11:59 AM
DescriptionWeakness
Data Sourced
via OSV·12:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·12:15 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is the severity of CVE-2021-3564?

CVE-2021-3564 has been classified as a high severity vulnerability due to its potential to cause system crashes.

2

How do I fix CVE-2021-3564?

To resolve CVE-2021-3564, ensure that your Linux kernel is updated to the versions specified by your distribution's security advisories.

3

Who is affected by CVE-2021-3564?

CVE-2021-3564 affects local users of systems running vulnerable versions of the Linux kernel that allow for HCI Bluetooth device initialization.

4

Can CVE-2021-3564 be exploited remotely?

CVE-2021-3564 requires local access to the system, as it involves user-initiated actions that can lead to a crash.

5

What types of Linux distributions are impacted by CVE-2021-3564?

CVE-2021-3564 affects several Linux distributions including Red Hat, Fedora, and Debian, depending on the kernel version.

Company

Resources

Contact

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