CVE-2019-19448: Use After Free

Published Dec 8, 2019
·
Updated

In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in trymergefreespace in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure.

Affected Software

125 affected componentsFixes available
Linux Linux kernel>=2.6.31<4.4.233
Linux Linux kernel>=4.5.0<4.9.233
Linux Linux kernel>=4.10<4.14.194
Linux Linux kernel>=4.15<4.19.141
Linux Linux kernel>=4.20<5.4.60
Linux Linux kernel>=5.5.0<5.7.17
Linux Linux kernel>=5.8<5.8.3
Debian Debian Linux=9.0
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
NetApp Active Iq Unified Manager Vmware Vsphere
NetApp Cloud Backup
NetApp Data Availability Services
NetApp Hci Management Node
NetApp Solidfire
NetApp Steelstore Cloud Integrated Storage
NetApp A700s Firmware
NetApp A700s
NetApp Fas 8300 Firmware
NetApp Fas 8300
NetApp Fas 8700 Firmware
NetApp Fas 8700
NetApp Fas A400 Firmware
NetApp Fas A400
NetApp Aff 8300 Firmware
NetApp Aff 8300
NetApp Aff 8700 Firmware
NetApp Aff 8700
NetApp Aff A400 Firmware
NetApp Aff A400
NetApp H610s Firmware
NetApp H610s
NetApp Solidfire Baseboard Management Controller Firmware
NetApp Solidfire Baseboard Management Controller
All of the following
NetApp A700s Firmware
NetApp A700s
All of the following
NetApp Fas 8300 Firmware
NetApp Fas 8300
All of the following
NetApp Fas 8700 Firmware
NetApp Fas 8700
All of the following
NetApp Fas A400 Firmware
NetApp Fas A400
All of the following
NetApp Aff 8300 Firmware
NetApp Aff 8300
All of the following
NetApp Aff 8700 Firmware
NetApp Aff 8700
All of the following
NetApp Aff A400 Firmware
NetApp Aff A400
All of the following
NetApp H610s Firmware
NetApp H610s
All of the following
NetApp Solidfire Baseboard Management Controller Firmware
NetApp Solidfire Baseboard Management Controller
debian/linux
6.1.176-16.1.190-16.12.107-16.12.113-17.2.12-17.2.13-1
ubuntu/linux-aws<4.4.0-1078.82
4.4.0-1078.82
ubuntu/linux-azure<4.15.0-1098.109~14.04.1
4.15.0-1098.109~14.04.1
ubuntu/linux-lts-xenial<4.4.0-190.220~14.04.1
4.4.0-190.220~14.04.1
ubuntu/linux*
ubuntu/linux<4.4.0-190.220
4.4.0-190.220
ubuntu/linux-aws<4.4.0-1114.127
4.4.0-1114.127
ubuntu/linux-aws-hwe<4.15.0-1085.90~16.04.1
4.15.0-1085.90~16.04.1
ubuntu/linux-azure<4.15.0-1098.109~16.04.1
4.15.0-1098.109~16.04.1
ubuntu/linux-gcp<4.15.0-1086.98~16.04.1
4.15.0-1086.98~16.04.1
ubuntu/linux-hwe<4.15.0-120.122~16.04.1
4.15.0-120.122~16.04.1
ubuntu/linux-kvm<4.4.0-1080.87
4.4.0-1080.87
ubuntu/linux-oracle<4.15.0-1056.61~16.04.1
4.15.0-1056.61~16.04.1
ubuntu/linux-raspi2<4.4.0-1139.148
4.4.0-1139.148
ubuntu/linux-snapdragon<4.4.0-1143.152
4.4.0-1143.152
ubuntu/linux-hwe-edge*
ubuntu/linux-fips<4.4.0-1046.51
4.4.0-1046.51
ubuntu/linux-fips*
ubuntu/linux<4.15.0-121.123
4.15.0-121.123
ubuntu/linux-aws<4.15.0-1086.91
4.15.0-1086.91
ubuntu/linux-aws-5.4<5.4.0-1025.25~18.04.1
5.4.0-1025.25~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1099.110
4.15.0-1099.110
ubuntu/linux-azure-5.4<5.4.0-1026.26~18.04.1
5.4.0-1026.26~18.04.1
ubuntu/linux-gcp-4.15<4.15.0-1086.98
4.15.0-1086.98
ubuntu/linux-gcp-5.4<5.4.0-1025.25~18.04.1
5.4.0-1025.25~18.04.1
ubuntu/linux-gke-4.15<4.15.0-1072.76
4.15.0-1072.76
ubuntu/linux-hwe-5.4<5.4.0-48.52~18.04.1
5.4.0-48.52~18.04.1
ubuntu/linux-kvm<4.15.0-1077.79
4.15.0-1077.79
ubuntu/linux-oem<4.15.0-1099.109
4.15.0-1099.109
ubuntu/linux-oracle<4.15.0-1057.62
4.15.0-1057.62
ubuntu/linux-oracle-5.4<5.4.0-1025.25~18.04.1
5.4.0-1025.25~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1019.21~18.04.1
5.4.0-1019.21~18.04.1
ubuntu/linux-raspi2<4.15.0-1073.78
4.15.0-1073.78
ubuntu/linux-snapdragon<4.15.0-1089.98
4.15.0-1089.98
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-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-fips<4.15.0-2030.31
4.15.0-2030.31
ubuntu/linux-azure-fips<4.15.0-2012.14
4.15.0-2012.14
ubuntu/linux-fips<4.15.0-1044.50
4.15.0-1044.50
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-48.52
5.4.0-48.52
ubuntu/linux-aws<5.4.0-1025.25
5.4.0-1025.25
ubuntu/linux-azure<5.4.0-1026.26
5.4.0-1026.26
ubuntu/linux-gcp<5.4.0-1025.25
5.4.0-1025.25
ubuntu/linux-kvm<5.4.0-1024.24
5.4.0-1024.24
ubuntu/linux-oracle<5.4.0-1025.25
5.4.0-1025.25
ubuntu/linux-raspi<5.4.0-1019.21
5.4.0-1019.21
ubuntu/linux-riscv<5.4.0-34.38
5.4.0-34.38
ubuntu/linux-oem-5.6*
ubuntu/linux-raspi2*
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*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. 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
  2. Upgrade

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

    Fixed in 4.4.0-1078.82
  3. Upgrade

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

    Fixed in 4.15.0-1098.109~14.04.1
  4. Upgrade

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

    Fixed in 4.4.0-190.220~14.04.1
  5. Upgrade

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

    Fixed in 4.4.0-190.220
  6. Upgrade

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

    Fixed in 4.4.0-1114.127
  7. Upgrade

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

    Fixed in 4.15.0-1085.90~16.04.1
  8. Upgrade

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

    Fixed in 4.15.0-1098.109~16.04.1
  9. Upgrade

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

    Fixed in 4.15.0-1086.98~16.04.1
  10. Upgrade

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

    Fixed in 4.15.0-120.122~16.04.1
  11. Upgrade

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

    Fixed in 4.4.0-1080.87
  12. Upgrade

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

    Fixed in 4.15.0-1056.61~16.04.1
  13. Upgrade

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

    Fixed in 4.4.0-1139.148
  14. Upgrade

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

    Fixed in 4.4.0-1143.152
  15. Upgrade

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

    Fixed in 4.4.0-1046.51
  16. Upgrade

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

    Fixed in 4.15.0-121.123
  17. Upgrade

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

    Fixed in 4.15.0-1086.91
  18. Upgrade

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

    Fixed in 5.4.0-1025.25~18.04.1
  19. Upgrade

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

    Fixed in 4.15.0-1099.110
  20. Upgrade

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

    Fixed in 5.4.0-1026.26~18.04.1
  21. Upgrade

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

    Fixed in 4.15.0-1086.98
  22. Upgrade

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

    Fixed in 5.4.0-1025.25~18.04.1
  23. Upgrade

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

    Fixed in 4.15.0-1072.76
  24. Upgrade

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

    Fixed in 5.4.0-48.52~18.04.1
  25. Upgrade

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

    Fixed in 4.15.0-1077.79
  26. Upgrade

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

    Fixed in 4.15.0-1099.109
  27. Upgrade

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

    Fixed in 4.15.0-1057.62
  28. Upgrade

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

    Fixed in 5.4.0-1025.25~18.04.1
  29. Upgrade

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

    Fixed in 5.4.0-1019.21~18.04.1
  30. Upgrade

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

    Fixed in 4.15.0-1073.78
  31. Upgrade

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

    Fixed in 4.15.0-1089.98
  32. Upgrade

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

    Fixed in 4.15.0-2030.31
  33. Upgrade

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

    Fixed in 4.15.0-2012.14
  34. Upgrade

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

    Fixed in 4.15.0-1044.50
  35. Upgrade

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

    Fixed in 5.4.0-48.52
  36. Upgrade

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

    Fixed in 5.4.0-1025.25
  37. Upgrade

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

    Fixed in 5.4.0-1026.26
  38. Upgrade

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

    Fixed in 5.4.0-1025.25
  39. Upgrade

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

    Fixed in 5.4.0-1024.24
  40. Upgrade

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

    Fixed in 5.4.0-1025.25
  41. Upgrade

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

    Fixed in 5.4.0-1019.21
  42. Upgrade

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

    Fixed in 5.4.0-34.38
  43. Upgrade

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

    Fixed in 5.4.0-1069.73+fips2
  44. Upgrade

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

    Fixed in 5.4.0-1073.76+fips1
  45. 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

Dec 8, 2019
CVE Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
CVE Published
via MITRE·01:01 AM
Data Sourced
via MITRE·01:01 AM
Description
Data Sourced
via OSV·02:15 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·02:15 AM
DescriptionSeverityWeaknessAffected Software

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2019-19448?

CVE-2019-19448 has a moderate severity level due to the potential for data corruption and denial of service.

2

How do I fix CVE-2019-19448?

To fix CVE-2019-19448, upgrade your Linux kernel to versions 5.10.223-1, 5.10.226-1, 6.1.123-1, 6.1.119-1, 6.12.10-1, or 6.12.11-1.

3

What versions of Linux kernel are affected by CVE-2019-19448?

CVE-2019-19448 affects Linux kernel versions 5.0.21 to 5.3.11 and several earlier versions up to 4.19.x.

4

Is CVE-2019-19448 a local or remote vulnerability?

CVE-2019-19448 is a local vulnerability that requires an attacker to have access to a system where the vulnerable kernel is running.

5

What type of vulnerability is CVE-2019-19448?

CVE-2019-19448 is a use-after-free vulnerability in the Linux kernel related to the btrfs filesystem.

Company

Resources

Contact

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