CVE-2021-3764: Medium severity Linux Linux kernel vulnerability

Published Aug 20, 2021
·
Updated

A memory leak flaw was found in the Linux kernel's ccprunaesgcmcmd() function that allows an attacker to cause a denial of service. The vulnerability is similar to the older CVE-2019-18808. The highest threat from this vulnerability is to system availability.

Other sources

A memory leak in the ccprunaesgcmcmd() function in drivers/crypto/ccp/ccp-ops.c in the Linux kernel allows attackers to cause a denial of service (memory consumption). It happens if function ccpinitdata(&src) returns error code (that is being called from the ccprunaesgcmcmd). This vulnerability is similar with the older CVE-2019-18808 and both with the CVE-2021-3744 (and the patch for the CVE-2021-3744 contains fix for this one too).

Reference: TODO: add link to the patch when available

— Red Hat

Affected Software

98 affected componentsFixes available
redhat/kernel-rt<0:4.18.0-372.9.1.rt7.166.el8
0:4.18.0-372.9.1.rt7.166.el8
redhat/kernel<0:4.18.0-372.9.1.el8
0:4.18.0-372.9.1.el8
redhat/linux kernel<4.12
4.12
Linux Linux kernel<=5.14.20
Linux Linux kernel=5.15
Linux Linux kernel=5.15-rc1
Linux Linux kernel=5.15-rc2
Linux Linux kernel=5.15-rc3
ubuntu/linux-azure<4.15.0-1127.140~14.04.1
4.15.0-1127.140~14.04.1
ubuntu/linux-aws-hwe<4.15.0-1116.123~16.04.1
4.15.0-1116.123~16.04.1
ubuntu/linux-azure<4.15.0-1127.140~16.04.1
4.15.0-1127.140~16.04.1
ubuntu/linux-gcp<4.15.0-1112.126~16.04.1
4.15.0-1112.126~16.04.1
ubuntu/linux-hwe<4.15.0-163.171~16.04.1
4.15.0-163.171~16.04.1
ubuntu/linux-oracle<4.15.0-1084.92~16.04.1
4.15.0-1084.92~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux<4.15.0-163.171
4.15.0-163.171
ubuntu/linux-aws<4.15.0-1116.123
4.15.0-1116.123
ubuntu/linux-aws-5.4<5.4.0-1060.63~18.04.1
5.4.0-1060.63~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1127.140
4.15.0-1127.140
ubuntu/linux-azure-5.4<5.4.0-1064.67~18.04.1
5.4.0-1064.67~18.04.1
ubuntu/linux-dell300x<4.15.0-1031.36
4.15.0-1031.36
ubuntu/linux-gcp-4.15<4.15.0-1112.126
4.15.0-1112.126
ubuntu/linux-gcp-5.4<5.4.0-1058.62~18.04.1
5.4.0-1058.62~18.04.1
ubuntu/linux-gke-5.4<5.4.0-1056.59~18.04.1
5.4.0-1056.59~18.04.1
ubuntu/linux-gkeop-5.4<5.4.0-1027.28~18.04.1
5.4.0-1027.28~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-91.102~18.04.1
5.4.0-91.102~18.04.1
ubuntu/linux-kvm<4.15.0-1103.105
4.15.0-1103.105
ubuntu/linux-oracle<4.15.0-1084.92
4.15.0-1084.92
ubuntu/linux-oracle-5.4<5.4.0-1058.62~18.04.1
5.4.0-1058.62~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1047.52~18.04.1
5.4.0-1047.52~18.04.1
ubuntu/linux-raspi2<4.15.0-1099.106
4.15.0-1099.106
ubuntu/linux-snapdragon<4.15.0-1116.125
4.15.0-1116.125
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<4.15.0-2057.59
4.15.0-2057.59
ubuntu/linux-azure-fips<4.15.0-2039.43
4.15.0-2039.43
ubuntu/linux-fips<4.15.0-1073.82
4.15.0-1073.82
ubuntu/linux-gcp-fips<4.15.0-2022.24
4.15.0-2022.24
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-91.102
5.4.0-91.102
ubuntu/linux-aws<5.4.0-1060.63
5.4.0-1060.63
ubuntu/linux-aws-5.11<5.11.0-1022.23~20.04.1
5.11.0-1022.23~20.04.1
ubuntu/linux-azure<5.4.0-1064.67
5.4.0-1064.67
ubuntu/linux-azure-5.11<5.11.0-1022.23~20.04.1
5.11.0-1022.23~20.04.1
ubuntu/linux-bluefield<5.4.0-1022.25
5.4.0-1022.25
ubuntu/linux-gcp<5.4.0-1058.62
5.4.0-1058.62
ubuntu/linux-gcp-5.11<5.11.0-1023.25~20.04.1
5.11.0-1023.25~20.04.1
ubuntu/linux-gke<5.4.0-1056.59
5.4.0-1056.59
ubuntu/linux-gkeop<5.4.0-1027.28
5.4.0-1027.28
ubuntu/linux-hwe-5.11<5.11.0-41.45~20.04.1
5.11.0-41.45~20.04.1
ubuntu/linux-hwe-5.13<5.13.0-22.22~20.04.1
5.13.0-22.22~20.04.1
ubuntu/linux-ibm<5.4.0-1008.9
5.4.0-1008.9
ubuntu/linux-kvm<5.4.0-1050.52
5.4.0-1050.52
ubuntu/linux-oem-5.10<5.10.0-1051.53
5.10.0-1051.53
ubuntu/linux-oem-5.13<5.13.0-1020.24
5.13.0-1020.24
ubuntu/linux-oem-5.14<5.14.0-1007.7
5.14.0-1007.7
ubuntu/linux-oracle<5.4.0-1058.62
5.4.0-1058.62
ubuntu/linux-oracle-5.11<5.11.0-1022.23~20.04.1
5.11.0-1022.23~20.04.1
ubuntu/linux-raspi<5.4.0-1047.52
5.4.0-1047.52
ubuntu/linux-riscv-5.11<5.11.0-1023.24~20.04.1
5.11.0-1023.24~20.04.1
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<5.4.0-1037.43
5.4.0-1037.43
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*
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 0:4.18.0-372.9.1.rt7.166.el8
  2. Upgrade

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

    Fixed in 0:4.18.0-372.9.1.el8
  3. Upgrade

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

    Fixed in 4.12
  4. Upgrade

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

    Fixed in 4.15.0-1127.140~14.04.1
  5. Upgrade

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

    Fixed in 4.15.0-1116.123~16.04.1
  6. Upgrade

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

    Fixed in 4.15.0-1127.140~16.04.1
  7. Upgrade

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

    Fixed in 4.15.0-1112.126~16.04.1
  8. Upgrade

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

    Fixed in 4.15.0-163.171~16.04.1
  9. Upgrade

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

    Fixed in 4.15.0-1084.92~16.04.1
  10. Upgrade

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

    Fixed in 4.15.0-163.171
  11. Upgrade

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

    Fixed in 4.15.0-1116.123
  12. Upgrade

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

    Fixed in 5.4.0-1060.63~18.04.1
  13. Upgrade

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

    Fixed in 4.15.0-1127.140
  14. Upgrade

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

    Fixed in 5.4.0-1064.67~18.04.1
  15. Upgrade

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

    Fixed in 4.15.0-1031.36
  16. Upgrade

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

    Fixed in 4.15.0-1112.126
  17. Upgrade

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

    Fixed in 5.4.0-1058.62~18.04.1
  18. Upgrade

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

    Fixed in 5.4.0-1056.59~18.04.1
  19. Upgrade

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

    Fixed in 5.4.0-1027.28~18.04.1
  20. Upgrade

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

    Fixed in 5.4.0-91.102~18.04.1
  21. Upgrade

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

    Fixed in 4.15.0-1103.105
  22. Upgrade

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

    Fixed in 4.15.0-1084.92
  23. Upgrade

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

    Fixed in 5.4.0-1058.62~18.04.1
  24. Upgrade

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

    Fixed in 5.4.0-1047.52~18.04.1
  25. Upgrade

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

    Fixed in 4.15.0-1099.106
  26. Upgrade

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

    Fixed in 4.15.0-1116.125
  27. Upgrade

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

    Fixed in 4.15.0-2057.59
  28. Upgrade

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

    Fixed in 4.15.0-2039.43
  29. Upgrade

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

    Fixed in 4.15.0-1073.82
  30. Upgrade

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

    Fixed in 4.15.0-2022.24
  31. Upgrade

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

    Fixed in 5.4.0-91.102
  32. Upgrade

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

    Fixed in 5.4.0-1060.63
  33. Upgrade

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

    Fixed in 5.11.0-1022.23~20.04.1
  34. Upgrade

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

    Fixed in 5.4.0-1064.67
  35. Upgrade

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

    Fixed in 5.11.0-1022.23~20.04.1
  36. Upgrade

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

    Fixed in 5.4.0-1022.25
  37. Upgrade

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

    Fixed in 5.4.0-1058.62
  38. Upgrade

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

    Fixed in 5.11.0-1023.25~20.04.1
  39. Upgrade

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

    Fixed in 5.4.0-1056.59
  40. Upgrade

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

    Fixed in 5.4.0-1027.28
  41. Upgrade

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

    Fixed in 5.11.0-41.45~20.04.1
  42. Upgrade

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

    Fixed in 5.13.0-22.22~20.04.1
  43. Upgrade

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

    Fixed in 5.4.0-1008.9
  44. Upgrade

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

    Fixed in 5.4.0-1050.52
  45. Upgrade

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

    Fixed in 5.10.0-1051.53
  46. Upgrade

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

    Fixed in 5.13.0-1020.24
  47. Upgrade

    Upgrade ubuntu/linux-oem-5.14 to a version that resolves this vulnerability.

    Fixed in 5.14.0-1007.7
  48. Upgrade

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

    Fixed in 5.4.0-1058.62
  49. Upgrade

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

    Fixed in 5.11.0-1022.23~20.04.1
  50. Upgrade

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

    Fixed in 5.4.0-1047.52
  51. Upgrade

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

    Fixed in 5.11.0-1023.24~20.04.1
  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-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1037.43
  55. Upgrade

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

    Fixed in 5.4.0-1067.71~20.04.1
  56. 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
  57. Upgrade

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

    Patch CVE-2021-3744

Event History

Aug 20, 2021
CVE Published
09:00 AM
Sep 15, 2021
Data Sourced
via OSV·12:00 AM
DescriptionSeverityAffected Software
Aug 23, 2022
CVE Published
via MITRE·03:52 PM
Data Sourced
via MITRE·03:52 PM
DescriptionWeakness

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-2021-3764?

CVE-2021-3764 has a high severity level due to its potential to cause denial of service.

2

How do I fix CVE-2021-3764?

To fix CVE-2021-3764, update the Linux kernel to one of the recommended patched versions provided by your distribution.

3

What systems are affected by CVE-2021-3764?

CVE-2021-3764 affects various versions of the Linux kernel, specifically those prior to version 5.15.

4

What type of vulnerability is CVE-2021-3764?

CVE-2021-3764 is a memory leak vulnerability found in the ccp_run_aes_gcm_cmd() function of the Linux kernel.

5

Can CVE-2021-3764 be exploited remotely?

CVE-2021-3764 could potentially be exploited by an attacker with local access to trigger the memory leak and cause denial of service.

Company

Resources

Contact

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