CVE-2019-19068: Medium severity Linux Linux kernel vulnerability

Published Nov 18, 2019
·
Updated

A flaw was found in the Linux kernel. A memory leak in the realtek driver allows an attacker to cause a denial of service through memory consumption. The highest threat from this vulnerability is to system availability.

Other sources

A memory leak in the rtl8xxxusubmitinturb() function in drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxucore.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering usbsubmiturb() failures, aka CID-a2cdd07488e6.

— Ubuntu

A memory leak in the rtl8xxxusubmitinturb() function in drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxucore.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering usbsubmiturb() failures.

Upstream Issue:

https://github.com/torvalds/linux/commit/a2cdd07488e666aa93a49a3fc9c9b1299e27ef3c

— Red Hat

Affected Software

66 affected componentsFixes available
redhat/kernel-rt<0:4.18.0-240.rt7.54.el8
0:4.18.0-240.rt7.54.el8
redhat/kernel<0:4.18.0-240.el8
0:4.18.0-240.el8
Linux Linux kernel<=5.3.11
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.10
Debian Debian Linux=8.0
Fedoraproject Fedora=30
Fedoraproject Fedora=31
openSUSE Leap=15.1
redhat Enterprise Linux=7.0
redhat Enterprise Linux=8.0
debian/linux
6.1.176-16.1.190-16.12.107-16.12.113-17.2.12-17.2.13-1
ubuntu/linux-aws<4.4.0-1062.66
4.4.0-1062.66
ubuntu/linux-azure<4.15.0-1074.79~14.04.1
4.15.0-1074.79~14.04.1
ubuntu/linux-lts-xenial<4.4.0-174.204~14.04.1
4.4.0-174.204~14.04.1
ubuntu/linux<4.4.0-174.204
4.4.0-174.204
ubuntu/linux-aws<4.4.0-1102.113
4.4.0-1102.113
ubuntu/linux-aws-hwe<4.15.0-1063.67~16.04.1
4.15.0-1063.67~16.04.1
ubuntu/linux-azure<4.15.0-1075.80
4.15.0-1075.80
ubuntu/linux-gcp<4.15.0-1058.62
4.15.0-1058.62
ubuntu/linux-hwe<4.15.0-91.92~16.04.1
4.15.0-91.92~16.04.1
ubuntu/linux-kvm<4.4.0-1066.73
4.4.0-1066.73
ubuntu/linux-oracle<4.15.0-1035.38~16.04.1
4.15.0-1035.38~16.04.1
ubuntu/linux-raspi2<4.4.0-1129.138
4.4.0-1129.138
ubuntu/linux-snapdragon<4.4.0-1133.141
4.4.0-1133.141
ubuntu/linux-hwe-edge*
ubuntu/linux-fips<4.4.0-1029.34
4.4.0-1029.34
ubuntu/linux-fips*
ubuntu/linux<4.15.0-91.92
4.15.0-91.92
ubuntu/linux-aws<4.15.0-1063.67
4.15.0-1063.67
ubuntu/linux-aws-5.0<5.0.0-1027.30
5.0.0-1027.30
ubuntu/linux-azure<5.0.0-1035.37
5.0.0-1035.37
ubuntu/linux-azure-5.3<5.3.0-1016.17~18.04.1
5.3.0-1016.17~18.04.1
ubuntu/linux-gcp<5.0.0-1033.34
5.0.0-1033.34
ubuntu/linux-gcp-5.3<5.3.0-1014.15~18.04.1
5.3.0-1014.15~18.04.1
ubuntu/linux-gke-4.15<4.15.0-1055.58
4.15.0-1055.58
ubuntu/linux-gke-5.0<5.0.0-1032.33
5.0.0-1032.33
ubuntu/linux-gke-5.3<5.3.0-1014.15~18.04.1
5.3.0-1014.15~18.04.1
ubuntu/linux-hwe<5.3.0-42.34~18.04.1
5.3.0-42.34~18.04.1
ubuntu/linux-kvm<4.15.0-1056.57
4.15.0-1056.57
ubuntu/linux-oem<4.15.0-1076.86
4.15.0-1076.86
ubuntu/linux-oem-osp1<5.0.0-1043.48
5.0.0-1043.48
ubuntu/linux-oracle<4.15.0-1035.39
4.15.0-1035.39
ubuntu/linux-oracle-5.0<5.0.0-1013.18
5.0.0-1013.18
ubuntu/linux-raspi2<4.15.0-1057.61
4.15.0-1057.61
ubuntu/linux-raspi2-5.3<5.3.0-1019.21~18.04.1
5.3.0-1019.21~18.04.1
ubuntu/linux-snapdragon<4.15.0-1074.81
4.15.0-1074.81
ubuntu/linux-azure-edge*
ubuntu/linux-gcp-edge*
ubuntu/linux-hwe-edge*
ubuntu/linux-aws-fips<4.15.0-2018.18
4.15.0-2018.18
ubuntu/linux-azure-fips<4.15.0-2006.7
4.15.0-2006.7
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-azure-fde*
ubuntu/linux-gke*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
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 0:4.18.0-240.rt7.54.el8
  2. Upgrade

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

    Fixed in 0:4.18.0-240.el8
  3. 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 6.12.113-1Fixed in 7.2.12-1Fixed in 7.2.13-1
  4. Upgrade

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

    Fixed in 4.4.0-1062.66
  5. Upgrade

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

    Fixed in 4.15.0-1074.79~14.04.1
  6. Upgrade

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

    Fixed in 4.4.0-174.204~14.04.1
  7. Upgrade

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

    Fixed in 4.4.0-174.204
  8. Upgrade

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

    Fixed in 4.4.0-1102.113
  9. Upgrade

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

    Fixed in 4.15.0-1063.67~16.04.1
  10. Upgrade

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

    Fixed in 4.15.0-1075.80
  11. Upgrade

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

    Fixed in 4.15.0-1058.62
  12. Upgrade

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

    Fixed in 4.15.0-91.92~16.04.1
  13. Upgrade

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

    Fixed in 4.4.0-1066.73
  14. Upgrade

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

    Fixed in 4.15.0-1035.38~16.04.1
  15. Upgrade

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

    Fixed in 4.4.0-1129.138
  16. Upgrade

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

    Fixed in 4.4.0-1133.141
  17. Upgrade

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

    Fixed in 4.4.0-1029.34
  18. Upgrade

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

    Fixed in 4.15.0-91.92
  19. Upgrade

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

    Fixed in 4.15.0-1063.67
  20. Upgrade

    Upgrade ubuntu/linux-aws-5.0 to a version that resolves this vulnerability.

    Fixed in 5.0.0-1027.30
  21. Upgrade

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

    Fixed in 5.0.0-1035.37
  22. Upgrade

    Upgrade ubuntu/linux-azure-5.3 to a version that resolves this vulnerability.

    Fixed in 5.3.0-1016.17~18.04.1
  23. Upgrade

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

    Fixed in 5.0.0-1033.34
  24. Upgrade

    Upgrade ubuntu/linux-gcp-5.3 to a version that resolves this vulnerability.

    Fixed in 5.3.0-1014.15~18.04.1
  25. Upgrade

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

    Fixed in 4.15.0-1055.58
  26. Upgrade

    Upgrade ubuntu/linux-gke-5.0 to a version that resolves this vulnerability.

    Fixed in 5.0.0-1032.33
  27. Upgrade

    Upgrade ubuntu/linux-gke-5.3 to a version that resolves this vulnerability.

    Fixed in 5.3.0-1014.15~18.04.1
  28. Upgrade

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

    Fixed in 5.3.0-42.34~18.04.1
  29. Upgrade

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

    Fixed in 4.15.0-1056.57
  30. Upgrade

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

    Fixed in 4.15.0-1076.86
  31. Upgrade

    Upgrade ubuntu/linux-oem-osp1 to a version that resolves this vulnerability.

    Fixed in 5.0.0-1043.48
  32. Upgrade

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

    Fixed in 4.15.0-1035.39
  33. Upgrade

    Upgrade ubuntu/linux-oracle-5.0 to a version that resolves this vulnerability.

    Fixed in 5.0.0-1013.18
  34. Upgrade

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

    Fixed in 4.15.0-1057.61
  35. Upgrade

    Upgrade ubuntu/linux-raspi2-5.3 to a version that resolves this vulnerability.

    Fixed in 5.3.0-1019.21~18.04.1
  36. Upgrade

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

    Fixed in 4.15.0-1074.81
  37. Upgrade

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

    Fixed in 4.15.0-2018.18
  38. Upgrade

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

    Fixed in 4.15.0-2006.7
  39. Configuration

    Blacklist the affected kernel module rtl8xxxu to prevent the vulnerable code from being loaded.

    Linux kernel module blacklist = rtl8xxxu

Event History

Nov 18, 2019
CVE Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
CVE Published
via MITRE·05:24 AM
Data Sourced
via MITRE·05:24 AM
Description
Data Sourced
via OSV·06:15 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·06:15 AM
RemedyDescriptionSeverityWeaknessAffected Software
Nov 21, 2019
Data Sourced
via Red Hat·10:44 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-2019-19068?

CVE-2019-19068 has a high severity due to its potential to cause denial of service through memory consumption.

2

How do I fix CVE-2019-19068?

To fix CVE-2019-19068, upgrade to the kernel versions 0:4.18.0-240.rt7.54.el8, 0:4.18.0-240.el8, or later patched versions.

3

Which systems are affected by CVE-2019-19068?

CVE-2019-19068 affects various systems including Red Hat, Ubuntu, Debian, Fedora, and openSUSE running specific versions of the Linux kernel.

4

What type of vulnerability is CVE-2019-19068?

CVE-2019-19068 is a memory leak vulnerability in the Realtek driver of the Linux kernel.

5

Can CVE-2019-19068 be exploited remotely?

Yes, an attacker can exploit CVE-2019-19068 remotely by triggering memory leaks, potentially leading to a denial of service.

Company

Resources

Contact

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