CVE-2022-49672: net: tun: unlink NAPI from device on destruction

Published Feb 26, 2025
·
Updated

In the Linux kernel, the following vulnerability has been resolved:

net: tun: unlink NAPI from device on destruction

Syzbot found a race between tun file and device destruction. NAPIs live in struct tunfile which can get destroyed before the netdev so we have to del them explicitly. The current code is missing deleting the NAPI if the queue was detached first.

Affected Software

164 affected componentsFixes available
Linux Linux kernel
IBM Verify Identity Access<=11.0 - 11.0.2
IBM Security Verify Access<=10.0 - 10.0.9.1
IBM Verify Identity Access Container<=11.0 - 11.0.2
IBM Security Verify Access Container<=10.0 - 10.0.9.1
Linux Linux kernel>=4.15<4.19.251
Linux Linux kernel>=4.20<5.4.204
Linux Linux kernel>=5.5<5.10.129
Linux Linux kernel>=5.11<5.15.53
Linux Linux kernel>=5.16<5.18.10
Linux Linux kernel=5.19-rc1
Linux Linux kernel=5.19-rc2
Linux Linux kernel=5.19-rc3
Linux Linux kernel=5.19-rc4
ubuntu/linux-azure<4.15.0-1153.168~14.04.1
4.15.0-1153.168~14.04.1
ubuntu/linux-aws-hwe<4.15.0-1142.154~16.04.1
4.15.0-1142.154~16.04.1
ubuntu/linux-azure<4.15.0-1153.168~16.04.1
4.15.0-1153.168~16.04.1
ubuntu/linux-gcp<4.15.0-1137.153~16.04.1
4.15.0-1137.153~16.04.1
ubuntu/linux-hwe<4.15.0-194.205~16.04.1
4.15.0-194.205~16.04.1
ubuntu/linux-oracle<4.15.0-1107.118~16.04.1
4.15.0-1107.118~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux<4.15.0-194.205
4.15.0-194.205
ubuntu/linux-aws<4.15.0-1142.154
4.15.0-1142.154
ubuntu/linux-aws-5.4<5.4.0-1086.93~18.04.1
5.4.0-1086.93~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1153.168
4.15.0-1153.168
ubuntu/linux-azure-5.4<5.4.0-1094.100~18.04.1
5.4.0-1094.100~18.04.1
ubuntu/linux-gcp-4.15<4.15.0-1137.153
4.15.0-1137.153
ubuntu/linux-gcp-5.4<5.4.0-1092.101~18.04.1
5.4.0-1092.101~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-128.144~18.04.1
5.4.0-128.144~18.04.1
ubuntu/linux-ibm-5.4<5.4.0-1034.38~18.04.1
5.4.0-1034.38~18.04.1
ubuntu/linux-kvm<4.15.0-1128.133
4.15.0-1128.133
ubuntu/linux-oracle<4.15.0-1107.118
4.15.0-1107.118
ubuntu/linux-oracle-5.4<5.4.0-1084.92~18.04.1
5.4.0-1084.92~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1071.81~18.04.1
5.4.0-1071.81~18.04.1
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-gke-4.15*
ubuntu/linux-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-fips<4.15.0-2081.87
4.15.0-2081.87
ubuntu/linux-azure-fips<4.15.0-2062.68
4.15.0-2062.68
ubuntu/linux-fips<4.15.0-1099.110
4.15.0-1099.110
ubuntu/linux-gcp-fips<4.15.0-2047.52
4.15.0-2047.52
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-128.144
5.4.0-128.144
ubuntu/linux-aws<5.4.0-1086.93
5.4.0-1086.93
ubuntu/linux-aws-5.15<5.15.0-1020.24~20.04.1
5.15.0-1020.24~20.04.1
ubuntu/linux-azure<5.4.0-1094.100
5.4.0-1094.100
ubuntu/linux-azure-5.15<5.15.0-1020.25~20.04.1
5.15.0-1020.25~20.04.1
ubuntu/linux-bluefield<5.4.0-1047.52
5.4.0-1047.52
ubuntu/linux-gcp<5.4.0-1090.98
5.4.0-1090.98
ubuntu/linux-gcp-5.15<5.15.0-1018.24~20.04.1
5.15.0-1018.24~20.04.1
ubuntu/linux-hwe-5.15<5.15.0-48.54~20.04.1
5.15.0-48.54~20.04.1
ubuntu/linux-ibm<5.4.0-1034.38
5.4.0-1034.38
ubuntu/linux-intel-iotg-5.15<5.15.0-1016.21~20.04.1
5.15.0-1016.21~20.04.1
ubuntu/linux-iot<5.4.0-1005.7
5.4.0-1005.7
ubuntu/linux-kvm<5.4.0-1076.81
5.4.0-1076.81
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-48.54~20.04.1
5.15.0-48.54~20.04.1
ubuntu/linux-oracle<5.4.0-1084.92
5.4.0-1084.92
ubuntu/linux-oracle-5.15<5.15.0-1018.23~20.04.1
5.15.0-1018.23~20.04.1
ubuntu/linux-raspi<5.4.0-1071.81
5.4.0-1071.81
ubuntu/linux-riscv-5.15<5.15.0-1019.22~20.04.1
5.15.0-1019.22~20.04.1
ubuntu/linux-aws-5.11*
ubuntu/linux-aws-5.13*
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.11*
ubuntu/linux-azure-5.13*
ubuntu/linux-azure-5.8*
ubuntu/linux-azure-fde*
ubuntu/linux-gcp-5.11*
ubuntu/linux-gcp-5.13*
ubuntu/linux-gcp-5.8*
ubuntu/linux-gke*
ubuntu/linux-gke-5.15*
ubuntu/linux-gkeop*
ubuntu/linux-gkeop-5.15*
ubuntu/linux-hwe-5.11*
ubuntu/linux-hwe-5.13*
ubuntu/linux-hwe-5.8*
ubuntu/linux-intel-5.13*
ubuntu/linux-oem-5.10*
ubuntu/linux-oem-5.13*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle-5.11*
ubuntu/linux-oracle-5.13*
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.11*
ubuntu/linux-riscv-5.8*
ubuntu/linux-aws-fips<5.4.0-1086.93+fips1
5.4.0-1086.93+fips1
ubuntu/linux-azure-fips<5.4.0-1094.100+fips1
5.4.0-1094.100+fips1
ubuntu/linux-fips<5.4.0-1062.70
5.4.0-1062.70
ubuntu/linux-gcp-fips<5.4.0-1092.101+fips1
5.4.0-1092.101+fips1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.15.0-48.54
5.15.0-48.54
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws<5.15.0-1020.24
5.15.0-1020.24
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-azure<5.15.0-1020.25
5.15.0-1020.25
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-fde<5.15.0-1024.30.1
5.15.0-1024.30.1
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp<5.15.0-1018.24
5.15.0-1018.24
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gke<5.15.0-1016.19
5.15.0-1016.19
ubuntu/linux-gkeop<5.15.0-1003.5
5.15.0-1003.5
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5*
ubuntu/linux-ibm<5.15.0-1015.17
5.15.0-1015.17
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-intel-iotg<5.15.0-1016.21
5.15.0-1016.21
ubuntu/linux-kvm<5.15.0-1018.22
5.15.0-1018.22
ubuntu/linux-lowlatency<5.15.0-48.54
5.15.0-48.54
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-lowlatency-hwe-6.5*
ubuntu/linux-nvidia<5.15.0-1007.7
5.15.0-1007.7
ubuntu/linux-nvidia-6.2*
ubuntu/linux-nvidia-6.5*
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-oem-6.5*
ubuntu/linux-oracle<5.15.0-1018.23
5.15.0-1018.23
ubuntu/linux-oracle-6.5*
ubuntu/linux-raspi<5.15.0-1015.17
5.15.0-1015.17
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-riscv-6.5*
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-starfive-6.5*
ubuntu/linux-realtime<5.15.0-1021.21
5.15.0-1021.21
ubuntu/linux-raspi-realtime*
debian/linux<5.18.14-1
5.18.14-1
debian/linux<5.18.14-1
5.18.14-1
debian/linux<5.18.14-1
5.18.14-1
debian/linux
6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 4.15.0-1153.168~14.04.1
  2. Upgrade

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

    Fixed in 4.15.0-1142.154~16.04.1
  3. Upgrade

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

    Fixed in 4.15.0-1153.168~16.04.1
  4. Upgrade

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

    Fixed in 4.15.0-1137.153~16.04.1
  5. Upgrade

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

    Fixed in 4.15.0-194.205~16.04.1
  6. Upgrade

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

    Fixed in 4.15.0-1107.118~16.04.1
  7. Upgrade

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

    Fixed in 4.15.0-194.205
  8. Upgrade

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

    Fixed in 4.15.0-1142.154
  9. Upgrade

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

    Fixed in 5.4.0-1086.93~18.04.1
  10. Upgrade

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

    Fixed in 4.15.0-1153.168
  11. Upgrade

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

    Fixed in 5.4.0-1094.100~18.04.1
  12. Upgrade

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

    Fixed in 4.15.0-1137.153
  13. Upgrade

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

    Fixed in 5.4.0-1092.101~18.04.1
  14. Upgrade

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

    Fixed in 5.4.0-128.144~18.04.1
  15. Upgrade

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

    Fixed in 5.4.0-1034.38~18.04.1
  16. Upgrade

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

    Fixed in 4.15.0-1128.133
  17. Upgrade

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

    Fixed in 4.15.0-1107.118
  18. Upgrade

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

    Fixed in 5.4.0-1084.92~18.04.1
  19. Upgrade

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

    Fixed in 5.4.0-1071.81~18.04.1
  20. Upgrade

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

    Fixed in 4.15.0-2081.87
  21. Upgrade

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

    Fixed in 4.15.0-2062.68
  22. Upgrade

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

    Fixed in 4.15.0-1099.110
  23. Upgrade

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

    Fixed in 4.15.0-2047.52
  24. Upgrade

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

    Fixed in 5.4.0-128.144
  25. Upgrade

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

    Fixed in 5.4.0-1086.93
  26. Upgrade

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

    Fixed in 5.15.0-1020.24~20.04.1
  27. Upgrade

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

    Fixed in 5.4.0-1094.100
  28. Upgrade

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

    Fixed in 5.15.0-1020.25~20.04.1
  29. Upgrade

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

    Fixed in 5.4.0-1047.52
  30. Upgrade

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

    Fixed in 5.4.0-1090.98
  31. Upgrade

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

    Fixed in 5.15.0-1018.24~20.04.1
  32. Upgrade

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

    Fixed in 5.15.0-48.54~20.04.1
  33. Upgrade

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

    Fixed in 5.4.0-1034.38
  34. Upgrade

    Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1016.21~20.04.1
  35. Upgrade

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

    Fixed in 5.4.0-1005.7
  36. Upgrade

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

    Fixed in 5.4.0-1076.81
  37. Upgrade

    Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-48.54~20.04.1
  38. Upgrade

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

    Fixed in 5.4.0-1084.92
  39. Upgrade

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

    Fixed in 5.15.0-1018.23~20.04.1
  40. Upgrade

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

    Fixed in 5.4.0-1071.81
  41. Upgrade

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

    Fixed in 5.15.0-1019.22~20.04.1
  42. Upgrade

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

    Fixed in 5.4.0-1086.93+fips1
  43. Upgrade

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

    Fixed in 5.4.0-1094.100+fips1
  44. Upgrade

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

    Fixed in 5.4.0-1062.70
  45. Upgrade

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

    Fixed in 5.4.0-1092.101+fips1
  46. Upgrade

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

    Fixed in 5.15.0-48.54
  47. Upgrade

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

    Fixed in 5.15.0-1020.24
  48. Upgrade

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

    Fixed in 5.15.0-1020.25
  49. Upgrade

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

    Fixed in 5.15.0-1024.30.1
  50. Upgrade

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

    Fixed in 5.15.0-1018.24
  51. Upgrade

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

    Fixed in 5.15.0-1016.19
  52. Upgrade

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

    Fixed in 5.15.0-1003.5
  53. Upgrade

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

    Fixed in 5.15.0-1015.17
  54. Upgrade

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

    Fixed in 5.15.0-1016.21
  55. Upgrade

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

    Fixed in 5.15.0-1018.22
  56. Upgrade

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

    Fixed in 5.15.0-48.54
  57. Upgrade

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

    Fixed in 5.15.0-1007.7
  58. Upgrade

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

    Fixed in 5.15.0-1018.23
  59. Upgrade

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

    Fixed in 5.15.0-1015.17
  60. Upgrade

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

    Fixed in 5.15.0-1021.21
  61. Upgrade

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

    Fixed in 5.18.14-1
  62. 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 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1

Event History

Feb 26, 2025
CVE Published
via MITRE·02:24 AM
Data Sourced
via MITRE·02:24 AM
DescriptionSeverity
Data Sourced
via Red Hat·03:05 AM
DescriptionSeverityAffected Software
Data Sourced
via OSV·07:01 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·07:01 AM
RemedyDescriptionSeverityAffected Software
Jul 8, 2026
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is the severity of CVE-2022-49672?

CVE-2022-49672 has a medium severity rating due to a race condition that may affect network performance and stability.

2

How do I fix CVE-2022-49672?

To fix CVE-2022-49672, ensure that you update your Linux kernel to the latest patched version provided by your distribution.

3

What software is affected by CVE-2022-49672?

CVE-2022-49672 affects the Linux kernel, which is used in various Linux distributions.

4

What are the implications of CVE-2022-49672?

The implications of CVE-2022-49672 involve potential network disruptions due to improper handling of the tun device during destruction.

5

Was CVE-2022-49672 publicly disclosed?

Yes, CVE-2022-49672 was publicly disclosed and addressed in the Linux kernel updates.

Company

Resources

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